Chair conversion device for a backpack
A chair conversion kit for an H-frame backpack includes left and right chair leg members that connect to the H-frame at left and right hinges. A seat member connects to the leg members and also connects to the H-frame such that, when the leg members are pivoted to a seating position, the seat member extends between the leg member and the H-frame to provide a seating platform. In other embodiments, a shelter fabric and a shelter frame member interact with the backpack and chair conversion kit to provide a shelter.
The present invention relates to improvements in backpacks and camp chairs, and more particularly the invention relates to a device that permits conversion of a backpack frame to a chair. In another embodiment, this invention relates to improvements in shelter structures, and, in yet another embodiment, to shelter structures supported, in part, by a backpack frame converted to a chair.
BACKGROUND OF THE INVENTIONBackpacks of the type intended for use in hunting and backcountry travel and exploration are crafted to enable a individual to carry heavy loads for prolonged periods of time. The backpack frames are therefore fabricated from strong lightweight materials and are designed with backpack loading weight distribution considerations in mind. To this end, backpacks having external H-type frame configurations constructed of sturdy light weight materials, such as tubular aluminum members, have proved very popular. They are generally known as “external frame” packs.
When hunting or hiking with a backpack on, it is often necessary to take the backpack off from time to time to sit down and rest. And once a hunting spot or camping spot is chosen, the backpack is typically taken off and placed somewhere where it will be readily accessible for its contents. Presently, when resting or making camp or preparing a hunting spot, most hikers and hunters simply prop their backpack against a tree or other structure to keep it generally upright so that its various pockets might be accessed. When resting along a trail or at a campsite/hunting spot, hunters and hikers typically rest sitting on a log or suitable rock provided by mother nature or come prepared with a suitable, packable camp chair. To improve on this general practice, there have been attempts in the prior art to combine backpack technology and camp chair technology to provide backpacks that convert to camping chairs.
U.S. Pat. No. 4,300,707 (Kjaer) and U.S. Pat. No. 4,720,029 (Varanakis) are examples of one type of backpack/chair conversion. With these devices, the pack material must be removed from the backpack frame before the user may sit down into the converted chair.
In U.S. Pat. No. 4,450,990 (Bolstad) the loaded pack material is left on the backpack frame during the chair conversion process. The Bolstad patent teaches to covert a backpack frame into a chair by partial disassembly, reorientation and reassembly of some of the component parts of the backpack frame. This approach adds undesirable complexity and weight to the backpack frame.
U.S. Pat. No. 4,795,068 (Blean), discloses a backpack chair wherein a single U-shaped frame member is pivotally attached to the upright side members of a backpack frame to cooperate with the adjustable shoulder straps of the backpack frame to form a seat when the U-shaped frame member is pivoted to a seating position. The bottom portion of the backpack frame forms the front leg support for the chair while rear leg support is provided by leaning the backpack against the nearest firm vertical surface, such as a tree or rock. Although this construct is simple and adds minimal extra weight, its utility as a convertible backpack chair is limited to specific site locations, i.e., limited only to those sites having a suitable vertical support surface close by. Additionally, the pack portions are placed facing the vertical support surface and are difficult to access. The stress on the pack frame is also likely excessive when one sits in the chair.
U.S. Pat No. 5,303,975 discloses a chair conversion device for a backpack wherein tubular side members are pivotally connected at approximately their midpoints to the main side frame members of an external frame pack. While the construction shown therein is suitable for providing a combination backpack and chair device, it suffers from providing a seating platform that is substantially off of horizontal and therefore likely to be slightly awkward and uncomfortable to many users. Additionally the adjustment of the chair configuration and particularly the size of the seat is achieved by using different configurations for a fabric seat member, thus requiring that different fabric seat members be provided for different people.
Various other ideas for providing a chair in combination with a backpack are provided in U.S. Pat. Nos. 4,389,866; 5,579,101; and 6,574,110; and U.S. Patent Application Publication Nos. 2002/0113103; 2004/0108350; 2004/0189062; and 2005/0225126. The present invention provides a chair conversion device configuration that interacts with a backpack in a manner heretofore not shown in the prior art.
Hunting blinds and other shelter structures such as tents are also widely used by hunters and backpackers. These items are separate and distinct from the backpacks that hunters and backpackers often use, and are usually carried within the backpack. The art would thus be advanced if hunting blind and tent structures could be incorporated into the structure of a backpack. The chair conversion device of this invention can be adapted to perform such a function. Thus, it is one aspect of the invention to provide a device for converting a backpack to a chair. It is another aspect of this invention to provide hunting blind and tent structures, more broadly, “shelter(s)” that are supported, in part, by a backpack converted to chair. It has also been found that shelters can be improved by incorporating them into the structure of a chair, whether or not that chair is formed from a backpack.
SUMMARY OF THE INVENTIONIn light of the foregoing, this invention provides a chair conversion device for a backpack of the type having an H-frame with left and right pack frame members, a shoulder strap crossbar, and left and right shoulder straps, the H-frame defining a strap side and a pack side, with the shoulder straps extending on the strap side. The chair conversion device includes a left chair leg member pivotally connected to the left pack frame member at a left hinge. This left chair leg member has a left seat extension portion extending above the left hinge and a left leg extension member extending below the left hinge. The device further includes a right chair leg member pivotally connected to the right pack frame member at a right hinge, the right chair leg member having a right seat extension portion extending above the right hinge and a right leg extension member extending below the right hinge. A seat member is connected at a front edge thereof to the left and right seat extension members and is secured at a rear edge thereof to the H-frame. The left and right chair leg members can pivot to a mobile position, whereat the seat member and the left and right chair leg members are folded against the H-frame so that the pack may be carried by the shoulder straps. The left and right chair leg members can also pivot to a seat position, whereat the left and right seat extension members are moved away from the strap side of the backpack to create a seating platform from the seat member, and the left and right leg extension members are moved away from the pack side of the backpack to create rear legs for the seat member, front legs being provided by the H-frame.
In accordance with another embodiment of this invention, a backpack including the chair conversion device as disclosed above further includes elements for creating a shelter using the backpack as part of the support structure. Particularly, in accordance with this embodiment, this invention provides a shelter comprising a backpack converted to a chair, said backpack including an H-frame providing left and right frame members; a shoulder strap cross bar; left and right shoulder straps, said H-frame defining a strap side and a pack side, said shoulder straps extending on the strap side; a left chair leg member pivotally connected to the left frame member at a left hinge, said left chair leg member having a left seat extension portion extending above said left hinge and a left leg extension member extending below said left hinge; a right chair leg member pivotally connected to the right frame member at a right hinge, said right chair leg member having a right seat extension portion extending above said right hinge and a right leg extension member extending below said right hinge; and a seat member connected at a front edge thereof to said left and right seat extension members and secured at a rear edge thereof to said H-frame, wherein said left and right chair leg members are in a seat position, whereat said left and right seat extension members are moved away from said strap side of said backpack to create a seating platform from said seat member, and said left and right leg extension members are moved away from said pack side of said backpack to create rear legs for said seat member; a left roof support extending from a connection to said left frame member; a right roof support extending from a connection to said right frame member, said left and right roof supports extending over said seat member; and a shelter fabric supported by said left and right roof support members and extending downwardly therefrom to enclose said chair.
Realizing that the concepts for creating a shelter in accordance with this invention might be employed with other chair structures not necessarily provided by backpacks, in yet another embodiment of this invention, there is provided a shelter comprising a chair having a seat member and a backrest, said backrest having left and right frame members; a left roof support extending from a connection to said left frame member; a right roof support extending from a connection to said right frame member, said left and right roof supports extending to a height above said seat member; and a shelter fabric supported by said left and right roof support members and extending downwardly therefrom to a shelter support surface.
BRIEF DESCRIPTION OF THE DRAWINGS
In the present invention, a chair conversion device is placed on a common backpack so that the backpack may be converted to a chair, when removed off of one's shoulders. Thus, it is first helpful to disclose some of the general elements of a backpack before disclosing the elements of the chair conversion device that interact with the backpack. Herein, elements of the backpack are disclosed and referred to in the figures with numerals under 100, while elements of the chair conversion device are disclosed and referred to in the figures with numerals of 100 and greater.
Thus, backpack 10 includes H-frame 12 having left pack frame member 14 and right pack frame member 16. Shoulder straps 18 extend from H-frame 12 on strap side 20, while pack fabric 22 is secured to H-frame 12 on pack side 24. Notably, the designations “left” and “right” herein designate those sides of the backpack that are placed proximate the “left” and “right” shoulder/arms of the user, when the backpack is worn. Thus, in
The chair conversion device that is secured to a backpack such as backpack 10 is shown and designated in the figures by the numeral 100. Chair conversion device 100 includes left chair leg member 102 pivotally connected to left pack frame member 14 at left hinge 104. The portion of left chair leg member 102 that extends above left hinge 104 is herein termed a “left seat extension member” and receives the numeral 106, while that portion extending below left hinge 104 is herein termed a “left leg extension member” and receives the numeral 108. Right chair leg member 110 connects to right pack frame member 16 at right hinge 112, with right seat extension member 114 extending above right hinge 112 and right leg extension member 116 extending below right hinge 112.
Although any suitable hinges may be employed, as can be seen in
Seat member 140 connects at its front edge 142 to left seat extension member 106 and right seat extension member 114, and connects at its rear edge 144 to H-frame 12. Although other means might be used to connect seat member 140 between left and right chair leg members 102, 116 and H-frame 12, in the preferred embodiment of this invention, crossbar 146 connects between left seat extension member 106 and right seat extension member 114, is preferably generally U-shaped, as shown, and is preferably integral with those leg members, although it may optionally telescope within the leg members, as indicated at the letter T in
More particularly, left and right chair leg members 102, 110 can pivot to a mobile position, as shown in
Virtually any strong, lightweight material can be employed for the leg members and crossbar of the chair conversion kit. Aluminum is currently a popular external frame material. The frames are generally hollow tubes, with packs and other extensions held in place by clevis pins or similar devices. Many tube members of the frame telescope relative to one another to take different positions and permit some adjustment of the frame. The seat member is preferably made from a sturdy fabric. In a particularly preferred embodiment, left chair member 102, at left leg extension member 108 is curved to extend further away from pack side 24 than it would if it were not curved. This is shown at curve 170. As seen in
While developing the above-disclosed chair conversion device for a backpack, it was determined that further improvements could be made by providing such a chair with other beneficial features, namely the ability to create a hunting blind or shelter. Thus, referring to
As perhaps best seen in
When received in left and right pack frame members 14, 16 and pivoted into a preferred position, as disclosed and shown in
Referring now to
Left extension member 202 fits within the tube of left pack frame member 14, once top cross bar 13 is removed from its connection to left and right pack frame members 14, 16. Right extension member 204 likewise fits within right pack frame member 16. At least one hole 236 is typically provided in the hollow tubes forming left and right pack frame members 14, 16, and, if not so provided, could be created to practice this invention. A snap button 238, which is spring loaded to extend beyond the outside diameter of left extension member 202, snaps into hole 236 to hold left extension member 202 in place. Pushing against snap button 238 to push it back into the hollow of left pack frame member 14 will then allow for removal or repositioning of left extension member 202, with repositioning being accomplished by the provision of multiple holes 236 along left pack frame member 14. Additionally, the extension members will tend to hold their position within the pack frame members due to friction between snap bottoms and the inside surface of the frame members. Right extension member 204 and right pack frame member 16 are similarly telescopingly engaged, as is top cross bar 13 relative to left and right roof supports 206, 208, as shown at hole 240 on left roof supports 206 and snap buttons 242 on top cross bar 13. Clearly, multi-section roof supports and extension members would have complimentary holes and snap buttons. By permitting the telescoping of top cross bar 13, the ceiling of the shelter can be altered, as shown in phantom in
Pivot brackets 210 are pivotally secured to left and right extension members 202, 204, as at pivot pin 244. They are welded or bolted or clevis pinned or otherwise secured to left and right roof support members 206, 208. Pivot brackets 210 preferably permit left and right roof supports 206, 208 to clear the top of left and right extension members 202, 204 to pivot from one side of the pack to the other, with movement to the strap side being stopped by contact between roof supports 206, 208 and left and right extension members 202, 204 or left and right pack frame members 14, 16 (if telescoped down to a great extent).
With reference to
While a full and complete description of the invention has been set forth in accordance with the dictates of the patent statutes, it should be understood that modifications can be resorted to without departing from the spirit hereof or the scope of the appended claims.
Claims
1. A chair conversion device for a backpack of the type having an H-frame with left and right pack frame members, a shoulder strap crossbar, and left and right shoulder straps, the H-frame defining a strap side and a pack side, said shoulder straps extending on the strap side, the chair conversion device comprising:
- a left chair leg member pivotally connected to the left pack frame member at a left hinge, said left chair leg member having a left seat extension portion extending above said left hinge and a left leg extension member extending below said left hinge;
- a right chair leg member pivotally connected to the right pack frame member at a right hinge, said right chair leg member having a right seat extension portion extending above said right hinge and a right leg extension member extending below said right hinge; and
- a seat member connected at a front edge thereof to said left and right seat extension members and secured at a rear edge thereof to the H-frame, wherein said left and right chair leg members can pivot to a mobile position, whereat said seat member and said left and right chair leg members are folded against the H-frame so that the pack may be carried by the shoulder straps, and a seat position, whereat said left and right seat extension members are moved away from the strap side of the backpack to create a seating platform from said seat member, and said left and right leg extension members are moved away from the pack side of the backpack to create rear legs for said seat member.
2. The chair conversion device of claim 1, wherein the left and right pack frame members of the H-frame form front legs for said seat member.
3. The chair conversion device of claim 1, wherein said seat member is at least partially secured to the shoulder strap crossbar of the H-frame at said back edge of said seat member.
4. The chair conversion device of claim 3, wherein said seat member is secured to the shoulder strap crossbar through an adjustable seat strap extending transversely from said back edge to the shoulder strap crossbar.
5. The chair conversion device of claim 1, wherein said seat member is secured to the H-frame by left and right seat adjustment straps connecting to respective left and right sides of said seat member at said back edge thereof and extending respectively around the left and right pack frame members to adjustably connect to one another at the pack side of the H-frame.
6. The chair conversion device of claim 5, wherein said left and right seat adjustment straps connect to one another through a buckle having one connector thereof carried by said left seat adjustment strap and a mating connector thereof carried by said right seat adjustment strap.
7. The chair conversion device of claim 1, wherein said seat member is secured to the shoulder strap crossbar through an adjustable seat strap extending transversely from said back edge to the shoulder strap crossbar, and further secured to the H-frame by left and right seat adjustment straps connecting to respective left and right sides of said seat member at said back edge thereof and extending respectively around the left and right pack frame members to connect to one another at the pack side of the H-frame.
8. The chair conversion device of claim 1, further comprising:
- a seat crossbar connecting said left and right seat extension portions of said left and right chair leg members.
9. The chair conversion device of claim 8, wherein said seat crossbar is a generally U-shaped bar and is integral with both said left and right chair leg members.
10. The chair conversion device of claim 9, wherein said seat member is connected at said front edge thereof to said left and right seat extension members by forming a sleeve about said U-shaped bar.
11. The chair conversion device of claim 1, wherein the degree to which said right and left chair leg members pivot from said mobile position to said seat position is dictated by the connection of said seat member at said front edge to said right and left chair leg members and at said back edge to the H-frame, the pivoting from said mobile position to said seat position being stopped when said seat member is pulled taut between said front edge and back edge.
12. A shelter comprising:
- a chair having a seat member and a backrest, said backrest having left and right frame members;
- a left roof support extending from a connection to said left frame member;
- a right roof support extending from a connection to said right frame member, said left and right roof supports extending to a height above said seat member; and
- a shelter fabric supported by said left and right roof support members and extending downwardly therefrom to a shelter support surface.
13. The shelter of claim 12, wherein said left and right roof supports extend over said seat member and said shelter fabric encloses said chair.
14. The shelter of claim 12, wherein said left and right roof support members are pivotally connected to respective said left and right frame members.
15. The shelter of claim 14, wherein said left roof support member is pivotally connected to a left telescoping extension that is secured to and telescopes relative to said left frame member, and said right roof support member is pivotally connected to a right telescoping extension that is secured to and telescopes relative to said right frame member.
16. The shelter of claim 12, wherein said chair rests on a surface and said shelter fabric extends downwardly to said surface and is staked thereto to enclose said chair.
17. The shelter of claim 12, wherein said shelter fabric has a zippered front portion facing the same direction as said seat member extends from said backrest, such that one sitting in said chair would face said zippered front.
18. The shelter of claim 17, wherein said shelter fabric has a hood opening above said zippered front portion, said hood opening including a draw cord for adjusting the size of said hood opening.
19. The shelter of claim 17, further comprising a shelter extension that secures to zipper members of said zippered front portion to enclose a greater volume.
20. The shelter of claim 12, wherein said left roof support telescopes and said right roof support telescopes such that the degree to which said left and right roof supports extend over said seat member is adjustable.
21. The shelter of claim 12, wherein said chair is a backpack converted to a chair.
22. The shelter of claim 19, wherein said backpack comprises:
- an H-frame providing said left and right frame members;
- a shoulder strap cross bar;
- left and right shoulder straps, said H-frame defining a strap side and a pack side, said shoulder straps extending on the strap side;
- a left chair leg member pivotally connected to the left frame member at a left hinge, said left chair leg member having a left seat extension portion extending above said left hinge and a left leg extension member extending below said left hinge;
- a right chair leg member pivotally connected to the right frame member at a right hinge, said right chair leg member having a right seat extension portion extending above said right hinge and a right leg extension member extending below said right hinge; and
- a seat member connected at a front edge thereof to said left and right seat extension members and secured at a rear edge thereof to the H-frame, wherein said left and right chair leg members are in a seat position, whereat said left and right seat extension members are moved away from the strap side of said backpack to create a seating platform from said seat member, and said left and right leg extension members are moved away from the pack side of said backpack to create rear legs for said seat member.
23. A shelter comprising:
- a backpack converted to a chair, said backpack including: an H-frame providing left and right frame members; a shoulder strap cross bar; left and right shoulder straps, said H-frame defining a strap side and a pack side, said shoulder straps extending on the strap side; a left chair leg member pivotally connected to the left frame member at a left hinge, said left chair leg member having a left seat extension portion extending above said left hinge and a left leg extension member extending below said left hinge; a right chair leg member pivotally connected to the right frame member at a right hinge, said right chair leg member having a right seat extension portion extending above said right hinge and a right leg extension member extending below said right hinge; and a seat member connected at a front edge thereof to said left and right seat extension members and secured at a rear edge thereof to said H-frame, wherein said left and right chair leg members are in a seat position, whereat said left and right seat extension members are moved away from said strap side of said backpack to create a seating platform from said seat member, and said left and right leg extension members are moved away from said pack side of said backpack to create rear legs for said seat member;
- a left roof support extending from a connection to said left frame member;
- a right roof support extending from a connection to said right frame member, said left and right roof supports extending over said seat member; and
- a shelter fabric supported by said left and right roof support members and extending downwardly therefrom to enclose said chair.
Type: Application
Filed: May 12, 2006
Publication Date: Nov 15, 2007
Inventors: Dana Rininger (Wadsworth, OH), Anthony Rininger (Copley, OH), Todd Rininger (Medina, OH)
Application Number: 11/432,925
International Classification: A45F 4/02 (20060101);