US20080172954A1 - Subterranean emergency shelter - Google Patents
Subterranean emergency shelter Download PDFInfo
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- US20080172954A1 US20080172954A1 US12/017,668 US1766808A US2008172954A1 US 20080172954 A1 US20080172954 A1 US 20080172954A1 US 1766808 A US1766808 A US 1766808A US 2008172954 A1 US2008172954 A1 US 2008172954A1
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- Prior art keywords
- chamber
- shelter
- base
- passageway
- closure
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/04—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate against air-raid or other war-like actions
- E04H9/10—Independent shelters; Arrangement of independent splinter-proof walls
- E04H9/12—Independent shelters; Arrangement of independent splinter-proof walls entirely underneath the level of the ground, e.g. air-raid galleries
Definitions
- the present invention relates generally to protective shelter structures, and more particularly to a subterranean tornado shelter.
- FIG. 1 is a perspective view of an exemplary shelter in accordance with the principles of the present disclosure.
- FIG. 2 is an exploded perspective view of the shelter of FIG. 1 .
- FIG. 3 is a perspective view of the shelter of FIG. 1 , installed beneath the ground.
- FIG. 4 is a cross-sectional view of the shelter of FIG. 3 , taken along line 4 - 4 .
- FIG. 5 is a cross-sectional view of the shelter of FIG. 3 , taken along line 5 - 5 .
- FIG. 6 is a detailed cross-section of the encircled area of FIG. 5 , illustrating an alternative embodiment.
- FIGS. 1 through 5 depict an exemplary subterranean emergency shelter 10 .
- the shelter 10 comprises a base 12 having an interior chamber 14 defined by a bottom wall 16 , at least one chamber sidewall 18 extending upwardly from the bottom wall 16 , and an open upper first end 20 .
- the base 12 is rotationally molded from polymeric material and has a double wall construction, wherein the inner wall surfaces 22 define the chamber 14 of the base 12 and the outer wall surfaces 24 define the exterior of the base 12 , as depicted in FIGS. 4-5 .
- Between the inner and outer walls 22 , 24 is a void or cavity 26 which may be filled with air or, alternatively, an insulative or ballast material 28 .
- a ballast material 28 in the cavity 26 may be water.
- the shelter 10 may be moved to an installation site without ballast material 28 in the cavity 26 , and may be placed in a desired location that has been excavated to accommodate the shelter 10 . Thereafter, the cavity 26 may be filled with an insulative or ballast material 28 . Accordingly, the unfilled cavity 26 minimizes the weight of the shelter 10 and facilitates transportation and handling of the shelter 10 prior to installation.
- the exterior surface of the base 12 comprises a first portion 30 having a generally frustoconical shape that gradually becomes wider in a direction from the open upper end 20 of the base 12 toward the lower end 32 of the base 12 .
- a second portion 34 of the exterior surface extends radially, outwardly from the first frustoconical portion 30 and has the general shape of an oblique rectangular prism which extends from the lower end 32 of the base 12 to the open upper end 20 .
- the exterior surface of the base 12 includes a plurality of ribs 36 extending generally from the lower end 32 of the base 12 toward the open upper end 20 .
- the ribs 36 are spaced apart circumferentially around the perimeter of the base 12 and define pockets 38 therebetween. The arrangement of ribs 36 and pockets 38 helps to strengthen the structure of the base 12 , and the sloped exterior walls help to anchor the base 12 below the ground surface 40 ( FIG. 3 ).
- the inner wall surfaces 22 of the base 12 define the chamber 14 .
- the chamber 14 includes a seat structure 42 that is integrally formed with the chamber sidewalls 18 .
- the seat structure 42 extends along the circumference of the chamber sidewall 18 and has a generally annular configuration.
- the chamber 14 further includes a recess 44 extending radially outwardly in the region of the second portion 34 of the base 12 and having the general form of a rectangular prism.
- a stairway 46 for entering and exiting the chamber 14 is located at the recess 44 , as will be described in more detail below.
- the shelter 10 further includes a closure 50 joined to the open upper end 20 of the base 12 to thereby enclose the chamber 14 .
- the closure 50 is rotationally molded from polymeric material and has a double wall construction, similar to that described below for the base 12 .
- various portions of the base 12 and closure 50 may be strengthened with “kiss-offs” 52 , 54 disposed between oppositely facing walls of the base 12 and/or closure 50 , as depicted in FIG. 4 .
- a kiss-off is a term of art that refers to a molded structure formed by bringing spaced, opposing wall surfaces together in a desired area such that the material of the opposed walls is joined or fused together in that area to define a common interface.
- the peripheral shape of the closure 50 comprises a generally circular portion 56 and a generally rectangular portion 58 extending generally radially therefrom, to correspond to the open upper end 20 of the base 12 .
- the closure 50 may include ribs 55 or other structure to provide strength and resist deformation under load.
- the closure 50 may be joined to the open upper end 20 of the base 12 , for example, by extrusion welding, joining with adhesive or fasteners, or by any other method suitable for coupling the closure 50 to the open upper end 20 of the base 12 .
- a passageway 60 extends through the closure 50 adjacent the generally rectangular portion 58 and is sized to facilitate entry into and exit from the chamber 14 .
- the passageway 60 comprises upper walls 62 a , 62 b , 62 c , 62 d extending generally upwardly from the top surface 64 of the closure 50 .
- the entire shelter 10 including the base 12 and top surface 64 of the closure 50 may be buried below grade, with only the upper portion of the passageway 60 extending above the ground surface 40 , as depicted in FIG. 3 .
- the shelter 10 further includes a door assembly 70 coupled to the passageway 60 , generally at the upper edge 72 of the upper walls 62 a , 62 b , 62 c , 62 d .
- the door assembly 70 comprises a generally rectangular doorframe 74 which may be secured to the upper edge 72 of the passageway 60 .
- a door 76 is hingedly coupled to the doorframe 74 and can be moved between a closed position ( FIG. 1 ) wherein the door 76 covers the entire passageway 60 , and an open position away from the passageway 60 ( FIGS. 2-5 ) to permit entry into or exit from the chamber 14 through the passageway 60 .
- the door assembly 70 includes one or more cylinders 78 , with extensible rods 78 a , to control movement of the door 76 between the open and closed positions.
- each cylinder 78 is coupled at a first end 80 to the doorframe 74 , and at a second end 82 to the door 76 .
- the door 76 includes oppositely disposed flange plates 84 a , 84 b on the side of the door 76 that faces the chamber 14 in the closed position.
- the second ends 82 of the cylinders 78 are coupled to the flange plates 84 a , 84 b .
- the cylinders 78 may be configured to lock the door 76 in at least one of the open position or closed position of the door 76 .
- the closure 50 further includes at least one vent 90 a , 90 b through the closure 50 and communicating with chamber 14 .
- Vents 90 a , 90 b provide a flow of fresh air into the chamber 14 and help to circulate air from the chamber 14 .
- vent pipes 92 may be coupled to the vents 90 a , 90 b to extend above the ground level 40 .
- the shelter 10 may include a circulating air fan 94 disposed in one of the vents 90 a , 90 b , or otherwise cooperating with one of the vents 90 a , 90 b , to draw fresh air in from outside the chamber 14 and to force air in the chamber 14 out through an oppositely positioned vent.
- the fan 94 may be powered by a battery, solar power, or various other power sources or combinations thereof (not shown).
- the shelter 10 further includes a stairway 46 extending from the chamber 14 and through the passageway 60 to facilitate entering the chamber 14 and exiting the chamber 14 through the passageway 60 .
- the stairway 46 comprises ladder-type structure including a plurality of rungs 100 spaced apart in a vertical direction and extending from the chamber 14 upwardly through the passageway 60 .
- the rungs 100 are supported in the chamber 14 by generally vertically extending chamber stringers 110 a , 110 b that are integrally formed with the chamber sidewalls 18 . As seen in FIGS.
- the chamber stringers 110 a , 110 b are located on oppositely disposed chamber sidewalls 18 within the protruding second portion 34 of the base 12 and the stringers 110 a , 110 b include notches 112 spaced in a vertical direction.
- the rungs 100 are received in respectively associated pairs of the notches 112 and may be secured therein, for example, by fasteners or other suitable structure.
- the passageway 60 also includes passageway stringers 114 a , 114 b disposed on oppositely facing portions of the upper walls 62 a , 62 c generally above the chamber stringers 110 a , 110 b such that the stairway 46 extends upwardly from the chamber 14 and through the passageway 60 .
- the passageway stringers 114 a , 114 b have pairs of notches 116 for supporting rungs 100 in a generally vertically spaced direction to provide a continuation of rungs 100 from chamber 14 .
- the door assembly 70 may also include one or more rungs 100 provided on the door 76 such that the stairway 46 extends outwardly from the passageway 60 when the door 76 is in the open position.
- the rungs 100 are secured to the door flanges 84 a , 84 b and are spaced apart in a generally vertical direction to provide a continuation of the rungs 100 from the passageway 60 . Accordingly, the door 76 may be moved to the open position and locked in place with the cylinders 78 , for example, whereby persons may enter or exit the chamber 14 using the rungs 100 provided in the chamber 14 and passageway 60 , and on the door 76 .
- This space 120 may be used as a storage area for tools, equipment, or provisions for persons using the shelter 10 during an emergency, such as during a tornado.
- the shelter may further include a faucet 126 within the chamber 14 and extending through a chamber sidewall 18 .
- Faucet 126 provides fluid communication between the chamber 14 and the cavity 26 that is located between the inner and outer walls 22 , 24 of the base 12 .
- the faucet 126 includes a spigot 128 communicating with the cavity 26 and a manually adjustable knob 130 for controlling the flow through the spigot 128 , whereby liquid ballast material 28 stored in the cavity 26 may be withdrawn through the spigot 128 .
- the faucet 126 may be used to draw water from the cavity 26 for use by occupants of the shelter 10 .
Abstract
In one embodiment, a shelter includes a base with an interior chamber defined by a bottom wall, a sidewall, and an open upper end. A closure is joined to the base to enclose the chamber. A passageway through the closure facilitates entry into the chamber and exit from the chamber. Rungs disposed in the chamber extend through the passageway to define a stairway. The shelter may also include a door coupled to the passageway. The door can be moved from a closed position covering the passageway to an open position away from the passageway.
Description
- This application claims priority to pending U.S. Provisional Patent Application No. 60/886,206, filed Jan. 23, 2007, which is incorporated by reference herein in its entirety.
- The present invention relates generally to protective shelter structures, and more particularly to a subterranean tornado shelter.
- The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and, together with a general description of the invention given above, and the detailed description given below, serve to explain the invention in sufficient detail to enable one of ordinary skill in the art to which the invention pertains to make and use the invention.
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FIG. 1 is a perspective view of an exemplary shelter in accordance with the principles of the present disclosure. -
FIG. 2 is an exploded perspective view of the shelter ofFIG. 1 . -
FIG. 3 is a perspective view of the shelter ofFIG. 1 , installed beneath the ground. -
FIG. 4 is a cross-sectional view of the shelter ofFIG. 3 , taken along line 4-4. -
FIG. 5 is a cross-sectional view of the shelter ofFIG. 3 , taken along line 5-5. -
FIG. 6 is a detailed cross-section of the encircled area ofFIG. 5 , illustrating an alternative embodiment. -
FIGS. 1 through 5 depict an exemplarysubterranean emergency shelter 10. Theshelter 10 comprises abase 12 having aninterior chamber 14 defined by abottom wall 16, at least onechamber sidewall 18 extending upwardly from thebottom wall 16, and an open upperfirst end 20. In the embodiment shown, thebase 12 is rotationally molded from polymeric material and has a double wall construction, wherein theinner wall surfaces 22 define thechamber 14 of thebase 12 and theouter wall surfaces 24 define the exterior of thebase 12, as depicted inFIGS. 4-5 . Between the inner andouter walls cavity 26 which may be filled with air or, alternatively, an insulative orballast material 28. In one embodiment, aballast material 28 in thecavity 26 may be water. - The
shelter 10 may be moved to an installation site withoutballast material 28 in thecavity 26, and may be placed in a desired location that has been excavated to accommodate theshelter 10. Thereafter, thecavity 26 may be filled with an insulative orballast material 28. Accordingly, theunfilled cavity 26 minimizes the weight of theshelter 10 and facilitates transportation and handling of theshelter 10 prior to installation. - In the embodiment shown, the exterior surface of the
base 12 comprises afirst portion 30 having a generally frustoconical shape that gradually becomes wider in a direction from the openupper end 20 of thebase 12 toward thelower end 32 of thebase 12. Asecond portion 34 of the exterior surface extends radially, outwardly from the firstfrustoconical portion 30 and has the general shape of an oblique rectangular prism which extends from thelower end 32 of thebase 12 to the openupper end 20. The exterior surface of thebase 12 includes a plurality ofribs 36 extending generally from thelower end 32 of thebase 12 toward the openupper end 20. Theribs 36 are spaced apart circumferentially around the perimeter of thebase 12 and definepockets 38 therebetween. The arrangement ofribs 36 andpockets 38 helps to strengthen the structure of thebase 12, and the sloped exterior walls help to anchor thebase 12 below the ground surface 40 (FIG. 3 ). - Referring to
FIGS. 4-5 , theinner wall surfaces 22 of thebase 12 define thechamber 14. In the embodiment shown, thechamber 14 includes aseat structure 42 that is integrally formed with thechamber sidewalls 18. In this embodiment, theseat structure 42 extends along the circumference of thechamber sidewall 18 and has a generally annular configuration. Thechamber 14 further includes arecess 44 extending radially outwardly in the region of thesecond portion 34 of thebase 12 and having the general form of a rectangular prism. Astairway 46 for entering and exiting thechamber 14 is located at therecess 44, as will be described in more detail below. - The
shelter 10 further includes aclosure 50 joined to the openupper end 20 of thebase 12 to thereby enclose thechamber 14. In the embodiment shown, theclosure 50 is rotationally molded from polymeric material and has a double wall construction, similar to that described below for thebase 12. To provide strength and rigidity to the structures of the rotationally moldedbase 12 andclosure 50, various portions of thebase 12 andclosure 50 may be strengthened with “kiss-offs” 52, 54 disposed between oppositely facing walls of thebase 12 and/orclosure 50, as depicted inFIG. 4 . A kiss-off is a term of art that refers to a molded structure formed by bringing spaced, opposing wall surfaces together in a desired area such that the material of the opposed walls is joined or fused together in that area to define a common interface. - The peripheral shape of the
closure 50 comprises a generallycircular portion 56 and a generallyrectangular portion 58 extending generally radially therefrom, to correspond to the openupper end 20 of thebase 12. Theclosure 50 may includeribs 55 or other structure to provide strength and resist deformation under load. Theclosure 50 may be joined to the openupper end 20 of thebase 12, for example, by extrusion welding, joining with adhesive or fasteners, or by any other method suitable for coupling theclosure 50 to the openupper end 20 of thebase 12. - Referring to
FIGS. 2-4 , apassageway 60 extends through theclosure 50 adjacent the generallyrectangular portion 58 and is sized to facilitate entry into and exit from thechamber 14. In the embodiment shown, thepassageway 60 comprisesupper walls top surface 64 of theclosure 50. In this configuration, theentire shelter 10, including thebase 12 andtop surface 64 of theclosure 50 may be buried below grade, with only the upper portion of thepassageway 60 extending above theground surface 40, as depicted inFIG. 3 . - The
shelter 10 further includes adoor assembly 70 coupled to thepassageway 60, generally at theupper edge 72 of theupper walls door assembly 70 comprises a generallyrectangular doorframe 74 which may be secured to theupper edge 72 of thepassageway 60. Adoor 76 is hingedly coupled to thedoorframe 74 and can be moved between a closed position (FIG. 1 ) wherein thedoor 76 covers theentire passageway 60, and an open position away from the passageway 60 (FIGS. 2-5 ) to permit entry into or exit from thechamber 14 through thepassageway 60. In the embodiment shown, thedoor assembly 70 includes one ormore cylinders 78, withextensible rods 78 a, to control movement of thedoor 76 between the open and closed positions. As seen inFIG. 4 , eachcylinder 78 is coupled at afirst end 80 to thedoorframe 74, and at asecond end 82 to thedoor 76. In the embodiment shown, thedoor 76 includes oppositely disposedflange plates door 76 that faces thechamber 14 in the closed position. Thesecond ends 82 of thecylinders 78 are coupled to theflange plates cylinders 78 may be configured to lock thedoor 76 in at least one of the open position or closed position of thedoor 76. - With reference to
FIG. 5 , theclosure 50 further includes at least onevent closure 50 and communicating withchamber 14.Vents chamber 14 and help to circulate air from thechamber 14. When theshelter 10 is installed below grade,vent pipes 92 may be coupled to thevents ground level 40. In one embodiment, theshelter 10 may include a circulatingair fan 94 disposed in one of thevents vents chamber 14 and to force air in thechamber 14 out through an oppositely positioned vent. Thefan 94 may be powered by a battery, solar power, or various other power sources or combinations thereof (not shown). - The
shelter 10 further includes astairway 46 extending from thechamber 14 and through thepassageway 60 to facilitate entering thechamber 14 and exiting thechamber 14 through thepassageway 60. In the embodiment shown, thestairway 46 comprises ladder-type structure including a plurality ofrungs 100 spaced apart in a vertical direction and extending from thechamber 14 upwardly through thepassageway 60. Therungs 100 are supported in thechamber 14 by generally vertically extendingchamber stringers chamber sidewalls 18. As seen inFIGS. 4-5 , thechamber stringers chamber sidewalls 18 within the protrudingsecond portion 34 of thebase 12 and thestringers notches 112 spaced in a vertical direction. Therungs 100 are received in respectively associated pairs of thenotches 112 and may be secured therein, for example, by fasteners or other suitable structure. - The
passageway 60 also includespassageway stringers upper walls 62 a, 62 c generally above the chamber stringers 110 a, 110 b such that thestairway 46 extends upwardly from thechamber 14 and through thepassageway 60. The passageway stringers 114 a, 114 b have pairs ofnotches 116 for supportingrungs 100 in a generally vertically spaced direction to provide a continuation ofrungs 100 fromchamber 14. - The
door assembly 70 may also include one ormore rungs 100 provided on thedoor 76 such that thestairway 46 extends outwardly from thepassageway 60 when thedoor 76 is in the open position. In this embodiment, therungs 100 are secured to thedoor flanges rungs 100 from thepassageway 60. Accordingly, thedoor 76 may be moved to the open position and locked in place with thecylinders 78, for example, whereby persons may enter or exit thechamber 14 using therungs 100 provided in thechamber 14 andpassageway 60, and on thedoor 76. - Behind the
rungs 100 ofstairway 46 and within therecess 44 defined by the protrudingrectangular prism portion 34 of thebase 12 is aspace 120. Thisspace 120 may be used as a storage area for tools, equipment, or provisions for persons using theshelter 10 during an emergency, such as during a tornado. - Referring now to
FIGS. 5 and 6 , the shelter may further include afaucet 126 within thechamber 14 and extending through achamber sidewall 18.Faucet 126 provides fluid communication between thechamber 14 and thecavity 26 that is located between the inner andouter walls base 12. In the embodiment shown, thefaucet 126 includes aspigot 128 communicating with thecavity 26 and a manuallyadjustable knob 130 for controlling the flow through thespigot 128, wherebyliquid ballast material 28 stored in thecavity 26 may be withdrawn through thespigot 128. When theballast material 28 is water, thefaucet 126 may be used to draw water from thecavity 26 for use by occupants of theshelter 10. - While the present invention has been illustrated by the description of an embodiment thereof, and while the embodiment has been described in considerable detail, it is not intended to restrict or in any way limit the scope of the appended claims to such detail. The various features shown and described herein may be used alone or in any combination. Additional advantages and modifications will readily appear to those skilled in the art. The invention in its broader aspects is therefore not limited to the specific details, representative apparatus and method and illustrative examples shown and described. Accordingly, departures may be made from such details without departing from the scope or spirit of the general inventive concept.
Claims (15)
1. A subterranean shelter, comprising:
a base including a chamber defined by a bottom wall, at least one chamber sidewall extending upwardly from said bottom wall, and an open upper end;
a closure joined to said open upper end of said base to thereby enclose said chamber;
a passageway through said closure adapted to facilitate entry into said chamber or exit from said chamber;
pairs of oppositely disposed notches in said chamber and said passageway through said closure, said pairs of notches spaced in a vertical direction and extending through said passageway; and
rungs supported by said respective pairs of notches to define a stairway extending from said chamber through said passage.
2. The shelter of claim 1 , further comprising a door coupled to said passageway, said door having a closed position covering said passageway, and an open position to permit entry into said chamber or exit from said chamber through said passageway.
3. The shelter of claim 2 , further comprising:
at least one rung on said door and cooperating with said rungs supported by said notches in said chamber and said passageway such that said stairway is extended outwardly of said passageway when said door is in said open position.
4. The shelter of claim 1 , wherein said base has an exterior surface comprising a first portion with a generally frustoconical shape that widens in a direction from said open upper end of said base toward a lower end of said base proximate said bottom wall, and a second portion extending radially outwardly from said first portion, said second portion having the shape of an oblique rectangular prism extending from said lower end of said base to said closure.
5. The shelter of claim 4 , further comprising a plurality of ribs formed on said exterior surface.
6. The shelter of claim 1 , wherein said passageway is defined by upper sidewalls extending vertically upwardly from said closure.
7. The shelter of claim 1 , wherein said base is rotationally molded from polymeric material.
8. The shelter of claim 7 , wherein said closure is rotationally molded from polymeric material.
9. The shelter of claim 8 , wherein said notches are integrally molded into said base and said closure
10. The shelter of claim 1 , further comprising a seat in said chamber and integrally formed with said chamber sidewall.
11. The shelter of claim 1 , further comprising at least one vent through said closure and communicating with said chamber.
12. The shelter of claim 11 , further comprising a fan associated with said at least one vent.
13. A subterranean shelter, comprising:
a base including a chamber defined by a bottom wall, at least one sidewall extending upwardly from said bottom wall, and an open upper end;
a closure joined to said open upper end of said base to thereby enclose said chamber;
a passageway through said closure adapted to facilitate entry into said chamber or exit from said chamber;
said base having a double-wall construction comprising an outer wall and an inner wall separated by an interior cavity; and
fluid ballast material disposed in said interior cavity.
14. The shelter of claim 13 , wherein said fluid ballast material is water.
15. A subterranean shelter, comprising:
a base including a chamber defined by a bottom wall, at least one sidewall extending upwardly from said bottom wall, and an open upper end;
a closure joined to said open upper end of said base to thereby enclose said chamber;
a passageway through said closure adapted to facilitate entry into said chamber or exit from said chamber;
said base having a double-wall construction comprising an outer wall and an inner wall separated by an interior cavity; and
a faucet within said chamber and communicating with said interior cavity, said faucet operative to facilitate the withdrawal of fluid material stored in said interior cavity.
Priority Applications (2)
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US12/017,668 US20080172954A1 (en) | 2007-01-23 | 2008-01-22 | Subterranean emergency shelter |
US29/334,290 USD610701S1 (en) | 2007-01-23 | 2009-03-24 | Subterranean emergency shelter |
Applications Claiming Priority (2)
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US88620607P | 2007-01-23 | 2007-01-23 | |
US12/017,668 US20080172954A1 (en) | 2007-01-23 | 2008-01-22 | Subterranean emergency shelter |
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US88620607P Continuation | 2007-01-23 | 2007-01-23 |
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US29/334,290 Continuation USD610701S1 (en) | 2007-01-23 | 2009-03-24 | Subterranean emergency shelter |
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US20080172954A1 true US20080172954A1 (en) | 2008-07-24 |
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US29/334,290 Expired - Lifetime USD610701S1 (en) | 2007-01-23 | 2009-03-24 | Subterranean emergency shelter |
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US29/334,290 Expired - Lifetime USD610701S1 (en) | 2007-01-23 | 2009-03-24 | Subterranean emergency shelter |
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US20070022678A1 (en) * | 2005-07-30 | 2007-02-01 | Sempel Donald J | In-ground storm shelter |
US20110047897A1 (en) * | 2009-08-27 | 2011-03-03 | Aram Stepanian | Underground Utility Vault Replacement System |
US20120079780A1 (en) * | 2010-09-30 | 2012-04-05 | Jerry Wirtz | In-ground shelter |
US20140366462A1 (en) * | 2013-06-14 | 2014-12-18 | Valley Storm Shelters, LLC | Storm Shelters |
US9316013B1 (en) * | 2014-02-08 | 2016-04-19 | Bunker Safety Structures, LLC | Concealed shelter |
US11795722B1 (en) * | 2020-04-13 | 2023-10-24 | Robert Hagemeister | Tornado shelter |
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Cited By (9)
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US20070022678A1 (en) * | 2005-07-30 | 2007-02-01 | Sempel Donald J | In-ground storm shelter |
US20110047897A1 (en) * | 2009-08-27 | 2011-03-03 | Aram Stepanian | Underground Utility Vault Replacement System |
US8307604B2 (en) * | 2009-08-27 | 2012-11-13 | Voltek International, Inc. | Underground utility vault replacement system |
US8413404B2 (en) * | 2009-08-27 | 2013-04-09 | Voltek International, Inc. | Underground utility vault replacement system |
US20120079780A1 (en) * | 2010-09-30 | 2012-04-05 | Jerry Wirtz | In-ground shelter |
US8646225B2 (en) * | 2010-09-30 | 2014-02-11 | Jerry Wirtz | In-ground shelter |
US20140366462A1 (en) * | 2013-06-14 | 2014-12-18 | Valley Storm Shelters, LLC | Storm Shelters |
US9316013B1 (en) * | 2014-02-08 | 2016-04-19 | Bunker Safety Structures, LLC | Concealed shelter |
US11795722B1 (en) * | 2020-04-13 | 2023-10-24 | Robert Hagemeister | Tornado shelter |
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