| Seat with a separately adjustable back rest and seat portion and an adjustable seat depth -> Monitor Keywords |
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Seat with a separately adjustable back rest and seat portion and an adjustable seat depthSeat with a separately adjustable back rest and seat portion and an adjustable seat depth description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20070194612, Seat with a separately adjustable back rest and seat portion and an adjustable seat depth. Brief Patent Description - Full Patent Description - Patent Application Claims
[0001] Seat with a separately adjustable back rest and seat portion and an adjustable seat depth. [0002] The present invention relates to a seat of the type comprising a seat portion and a back rest, hinged to one another about an axis of rotation. [0003] More specifically, the present invention relates to a seat of the abovementioned type in which said hinging is achieved in the form of a pair of means located on either side of the seat about a plane of symmetry passing through the back rest and the seat portion, each of said means consisting of, on the one hand, a first element, forming a back rest rotation support, through which said axis of rotation passes and one end of which is integral with said back rest, and, on the other hand, a second element. [0004] A seat meeting this definition is known from US patent application US2003/0011226 A1. It consists of a car seat comprising an inverted U-shaped part as a back rest structure 14 and a frame as a seat portion structure 10, said frame being mounted so as to slide on a support 86. Each free end of the U-shaped part constitutes what was referred to above as a first element, and the second element of the hinge system is a part integral with the frame 10, in such a way that the second element is the seat portion frame itself. The ends of the U-shaped part are inserted in a slot made in the seat portion frame 10 in such a way that, when the seat portion structure slides, the back rest structure can only follow. [0005] No means are provided for adjusting the depth of the seat portion and any such adjustment is entirely impossible owing to the fact that the back rest structure is inserted in the seat portion structure. [0006] However, an important factor in the user's comfort is that the depth of the seat portion be adapted to his size. For example, it is just as uncomfortable for a tall person whose thighs jut out to some extent over the front of the seat portion as for a short person whose legs do not touch the floor when he is sitting back in the seat. [0007] The invention proposes a novel solution to this problem by combining the hinging of the back rest/seat with the adjustment of the depth of the seat portion. [0008] To this end, the invention relates to a seat of the abovementioned type, characterized in that said second element is a part which is [0009] separate from the seat portion, [0010] integral with said first element via said axis of rotation which passes through said second element near one of its ends and said first element, [0011] mounted so as to be able to slide on a part integral with the seat portion and [0012] immobilizable in a desired position with respect to this same part, [0013] a first extendable/retractable member being fastened, on the one hand, to the end of said first element opposite the end which is integral with the back rest and, on the other hand, to the end of said second element which is opposite the axis of rotation. [0014] By virtue of this arrangement, as will be explained below, the back rest rotation support can be moved in translation with respect to the seat portion. [0015] In a preferred embodiment, the first extendable/retractable member is a gas spring, i.e. an element with a hydro-pneumatic structure having a cylinder and a piston, making it possible to pivot the back rest and counterbalance the movement at a controlled speed, simply under the effect of the user's upper torso pressing on the back rest. [0016] Since the force of the user's pressing depends on the latter's weight, it is thus convenient to be able to adjust the gas spring. [0017] To this end, its point of fastening to said back rest rotation support is adjustable along said support. [0018] Thus, the length of travel of the gas spring piston and, hence, its resistance can be set as desired. [0019] The seat portion sliding support advantageously comprises a stop limiting the pivoting of the back rest with respect to the seat portion. [0020] As stated above, the seat portion sliding support slides with respect to a part integral with the seat portion and is immobilizable with respect to this same part. The back rest rotation support and the seat portion sliding support are integral via the axis of rotation, and therefore the back rest rotation support also slides with respect to the part integral with the seat portion and, as a result, the distance between the back rest and the free edge of the seat portion can be adjusted (in other words, the depth of the seat portion can be adjusted). [0021] In adjustable seats, such as the seats in motor vehicles and airplanes, the backrest may be adjusted with respect to the general plane of the seat portion, which itself remains fixed. Seats are also known in which the rearward adjustment of the back rest causes the seat portion to tilt upward, and vice versa. [0022] For improved comfort, it would however be desirable if, in the same seat, not only the angle between the back rest and the seat portion could be modified at will but also if the angle between the general plane of the seat portion and the floor could also be modified, and if these two modifications could be independent of one another. [0023] To this end, the seat according to the invention also comprises a seat portion support that rests directly or indirectly on the floor and this seat portion support has a point of fastening for one of the ends of a second extendable/retractable member whose other end is fastened to the seat portion. [0024] This second extendable/retractable member may be a pneumatic jack or an electric jack. [0025] It is thus possible to tilt the back rest and the seat portion independently of one another. [0026] In a preferred embodiment of the invention, the seat is a relaxation armchair and, to this end, it also comprises a leg rest. [0027] Since it is important, here again, that the leg rest can be operated independently of the adjustment of the back rest and of the adjustment of the seat portion, said leg rest has a point of fastening for one of the ends of a third extendable/retractable member whose other end is fastened to the seat portion. [0028] This third extendable/retractable member may be a pneumatic jack or an electric jack. Continue reading about Seat with a separately adjustable back rest and seat portion and an adjustable seat depth... Full patent description for Seat with a separately adjustable back rest and seat portion and an adjustable seat depth Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Seat with a separately adjustable back rest and seat portion and an adjustable seat depth 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 Seat with a separately adjustable back rest and seat portion and an adjustable seat depth or other areas of interest. ### Previous Patent Application: Molded touch fasteners and methods of manufacture Next Patent Application: Vehicle seat apparatus Industry Class: Chairs and seats ### FreshPatents.com Support Thank you for viewing the Seat with a separately adjustable back rest and seat portion and an adjustable seat depth patent info. IP-related news and info Results in 0.10842 seconds Other interesting Feshpatents.com categories: Qualcomm , Schering-Plough , Schlumberger , Seagate , Siemens , Texas Instruments , 174 |
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