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Detachable three-piece chairDetachable three-piece chair description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20080023999, Detachable three-piece chair. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND OF THE INVENTION [0001]1. Field of Invention [0002]The present invention relates to folding chairs and more particularly to a chair comprising two frame members and a backrest, these components adapted to easily either assemble or detach without involving any tool. [0003]2. Related Art [0004]Folding chairs are well known. Conventionally, a folding chair has one or more hinges (or pivots) each for pivotably connecting two components thereof. As such, the chair can be folded, for example in a storage state. [0005]But this is unsatisfactory for the purpose for which the invention is concerned for the following reasons: The provision of hinges can complicate the manufacturing process. Further, it is not durable. That is, its useful life is short. Thus, the need for improvement still exists. SUMMARY OF THE INVENTION [0006]It is therefore an object of the present invention to provide a detachable chair comprising two frame members and a backrest, these components being adapted to easily either assemble or detach without involving any tool. [0007]To achieve the above and other objects, the present invention provides a detachable chair comprising a first frame member including two parallel first side rails having a leg and a lengthwise slit, a plurality of front first cross rails interconnecting the first side rails, and a plurality of rear second cross rails interconnecting the first side rails; a second frame member including two parallel second side rails having a leg, a plurality of first seat rails interconnecting the second side rails and having either end portion projecting laterally out of the second side rail, and a second seat rail disposed rearward of the first seat rails and interconnecting the second side rails, the second seat rail having either end being about flush with an outer surface of the second side rail wherein a transverse length of the second frame member is smaller than a distance between inner side surfaces of the first side rails by a predetermined minimum value; and a backrest including a sheath at either side, the sheaths being adapted to insert through the slits to dispose internally of the first side rails, and two stop members disposed through the sheaths and urged against the slits; whereby inserting the second frame member through a gap between one of the second cross rails and one of the first cross rails until being stopped by the first frame member with the second side rails rested upon one of the first cross rails will assemble the inclined first and second frame members as a chair. [0008]In one aspect of the present invention each of the legs of the first side rails has an inclined bottom. [0009]The above and other objects, features and advantages of the present invention will become apparent from the following detailed description taken with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS [0010]FIG. 1 is a perspective view of a preferred embodiment of detachable chair according to the invention; [0011]FIG. 2 is a perspective view of the detached first and second frame members; [0012]FIG. 3 is a perspective view of the detached first and second frame members being assembled as a flat piece prior to storage; [0013]FIG. 4 is a perspective view of the detached first and second frame members having been assembled as a flat piece in a storage state; and [0014]FIGS. 5, 6, and 7 are perspective views illustrating three steps of forming the backrest of the chair by assembling a rectangular member with the side rails respectively. DETAILED DESCRIPTION OF THE INVENTION [0015]Referring to FIGS. 1 to 7, a detachable chair in accordance with a preferred embodiment of the invention comprises a first frame member 10 and a second frame member 20. Each component is discussed in detailed below. [0016]The first frame member 10 comprises two parallel first side rails 11 having a leg 111 and an intermediate, lengthwise slit 15, a plurality of front first cross rails 13 interconnecting front surfaces of the first side rails 11, a plurality of rear second cross rails 12 interconnecting rear surfaces of the first side rails 11, and a third cross rail 14 interconnecting inner side surfaces of the first side rails 11, the third cross rail 14 being disposed lower than the lowest first cross rail 13. [0017]The second frame member 20 comprises two parallel second side rails 22 having a leg 24, the second side rails 22 being shorter than the first side rails 11, a plurality of first seat rails 21 interconnecting upper surfaces of the second side rails 22, each first seat rail 21 having an end portion 211 projecting laterally out of the second side rail 22, and a second seat rail 23 disposed in a rear of the first seat rails 21 and interconnecting the upper surfaces of the second side rails 22, the second seat rail 23 having either end 232 flush with an outer side surface of the second side rail 22. As such, a rear surface of the second seat rail 23 is engaged with and stopped by a lower front portion of the lowest rear second cross rail 12, the second side rails 22 are rested upon the lowest first cross rail 13, and the legs 111 and 24 are supported on the ground in response to inserting the second frame member 20 through a gap between the lowest first cross rail 13 and the lowest rear second cross rail 12 in a process of assembling both the first and second frame members 10 and 20 as a chair. Note that each of the legs 111 has an inclined bottom and each of the legs 24 has an inclined portion such that the assembled chair can stand firmly on the ground (see FIG. 1). It is also shown in FIG. 1 that either end of each of the first seat rails 21 is flush with an outer side surface of each of the first side rails 11 in the assembled state of the chair. In view of the above, the assembling process of the chair is very easy and simple. Also, the assembled chair can stand firmly and withstand the weight of a person sit on the first seat rails 21. Further, a transverse length of the second frame member 20 is slightly smaller than a distance between the inner side surfaces of the first side rails 11. Thus, the detached first and second frame members 10 and 20 can be assembled as a flat piece prior to storage (see FIGS. 2, 3, and 4). [0018]For the comfort of a person sitting on the chair, a backrest 40 is provided by referring to FIGS. 5 to 7 specifically. The backrest 40 is formed of a fabric or an elastomeric material. The backrest 40 is rectangular and comprises a sheath 41 at either side. The sheath 41 has a length slightly smaller than that of the slit 15 (see FIG. 5). In assembly, the sheaths 41 are adapted to insert through the slits 15 to dispose internally of the first side rails 11 (see FIG. 6). Next, insert a cylindrical rod 42 having a length longer than that of each of the slit 15 and the sheath 41 through the sheath 41 until both ends of the rod 41 are disposed externally of the sheaths 41 (see FIG. 7). In this position, the backrest 40 is secured across the slits 15 since the sheaths 41 are prevented from passing through the slits 15 when a force is exerted upon the backrest 40 due to the stopping effect of the rods 42. Thus, a person sifting on the first seat rails 21 can comfortably rest the back on the backrest 40. [0019]While the invention herein disclosed has been described by means of specific embodiments, numerous modifications and variations could be made thereto by those skilled in the art without departing from the scope and spirit of the invention set forth in the claims. Continue reading about Detachable three-piece chair... Full patent description for Detachable three-piece chair Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Detachable three-piece chair patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Detachable three-piece chair or other areas of interest. ### Previous Patent Application: Anti-backlash resistant gearing for a seat mechanism Next Patent Application: Method and device for continuously informing the operator of a tunneling machine on physical features of a ground to be tunnelled Industry Class: Chairs and seats ### FreshPatents.com Support Thank you for viewing the Detachable three-piece chair patent info. 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