Chairs and seats – Bottom or back – Contoured bottom
Reexamination Certificate
1999-06-18
2001-04-17
Barfield, Anthony D. (Department: 3624)
Chairs and seats
Bottom or back
Contoured bottom
C297S452210, C297S452290, C601S097000
Reexamination Certificate
active
06217121
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention is a cushioning system for chairs, automobile seats, beds and the like that features a multiple pin and spring assembly for the utmost in user comfort. Specifically, the cushioning apparatus includes a great number of vertically moving pins, preferably with spherical shaped members at a top portion thereof, that receive the weight of the user and function to fit the contour of the user's body. In the preferred mode, wood spherical embers upon stainless steel pins are in close proximity to one another, to engage all relevant pressure points of the body and allow the user to remain on the furniture item for extended periods without discomfort. Based on the particular needs of users, the device may include a varying quantity of pins, a varying length of pins utilized, and varying materials of construction. The device may also be designed in an aesthetically pleasing manner, with pins and spherical heads colored in such a fashion as to create desired images upon the furniture item. In all such cases, the device allows for the frame of the furniture item to be simpler in nature and easier to manufacture, as the pins themselves may be shaped to adequately conform to the contour of the human body.
2. Description of the Prior Art
Numerous innovations for cushioning devices have been provided in the prior art that are described as follows. Even though these innovations may be suitable for the specific individual purposes to which they address, they differ from the present invention as hereinafter contrasted. The following is a summary of those prior art patents most relevant to the invention at hand, as well a description outlining the differences between the features of the present invention and those of the prior art.
U.S. Pat. No. 4,798,414, issued to Hughes, titled “Physiotherapeutic chair like device”
The patent to Hughes describes a special chair with embodiments providing means for prevention and treatment of back disorders by both static and dynamic operational modes comprising an integral seat and back assembly composed of multiple articulating hard surfaced segments floating on and supported by a plurality of elastic tension cords, some having oval shaped cams attached thereto. The elastic tension cords are suspended in parallel and attached to transverse members which are connected to left and right chair sides all of which are assembled in an arrangement to automatically adjust contoured and proper support to the lower and middle back regions in accordance with the weight and body bulk distribution of the occupant. A motor drive arrangement and cam spool assembly are concealed within the body of the chair to activate the hard surface elongated segments of said integral seat and back assembly in an alternating translatory and articulating motion to result in passive exercise to the lower and middle back muscles and vertebrae of the occupant.
U.S. Pat. No. 5,632,473, issued to Dias Magalhaes Queiroz, titled “Elastic spring and spring support for mattress, chair or upholstery”
In the patent to Queiroz, an elastic framework for a mattress, chair, upholstery, etc. is disclosed which includes elastic springs made of opposing upper and lower elastic elements, each elastic element having a base portion and a plurality of flexible arms which extend from the base portion and are joined to the flexible arms of the opposing upper or lower element so as to form a closed flexible ring. These flexible rings are joined to top support elements and bottom support elements at the base portion of the upper and lower elastic elements, respectively, and the top support elements as well as the bottom supported elements are respectively interconnected so as to form a spring support.
U.S. Pat. No. 4,911,500, issued to Saiger, titled “Spring chair frame and method of fabricating same”
The patent to Saiger describes a spring chair has a seat frame and a base frame including an upper portion fixed to the seat frame, spaced front leg portions extending generally vertically down from said upper portions at the front of the seat portion, and base portions extending horizontally rearwardly from the leg portions to underlie the seat portion. The leg portions and base portions extend from a right angular bend portion and have lengthwisely extending openings. Unitary right angular springs inserted in the openings provide spring resilience to the bend portions which will restore them to normal position. The springs are preinserted in the linear extrusion strip which is bent to the base frame configuration so that extrusion a bending and spring bending occur simultaneously.
U.S. Pat. No. 5,100,201, issued to Becker, III, et. al., titled “Passive ergonomic work chair”
In the patent to Becker, a personal office or work chair is provided which includes an open frame construction wherein a seat portion of the chair includes a pair of front springs mounted on either side of the frame, each spring located between frame members extending rearwardly toward the chair seat back portion of the chair, and forwardly to the front edge of the seat portion. In a preferred arrangement, each spring comprises a strip of non-woven fiberglass epoxy resin including forward and rearward substantially planar mounting portions. At the same time, the seat back portion of the chair includes an open frame wherein a pair of laterally spaced frame members are hingedly secured to the corresponding laterally spaced frame members of the seat portion by a hinge bar or rod extending across the frame. One each side of the frame, there is a relatively rigid but somewhat flexible plastic spring fixedly secured between adjacent seat frame and seat back frame members, overlapping the hinged connection between the seat and seat back frame portions. These relatively rigid plastic springs are generally L-shaped and are fixedly riveted to the seat frame members.
U.S. Pat. No. 5,580,128, issued to Johnson, et. al., titled “Therapeutic seat”
The Johnson invention is an improved seat device to be used by those who have pain or discomfort sitting on a regular seat. The seat device can be attached to a chair frame or be used as a portable unit in the home or while traveling.
U.S. Pat. No. 5,077,849, issued to Farley, titled “Anatomically conformable foam support pad”
The patent to Farley describes a convoluted foam pad for supporting a reclining human body on a bed including an area for supporting the shoulders of a body, an area for supporting the tail portion of a body and a general support area surrounding the shoulder and tail support areas for supporting the remainder of the body. In one embodiment the support area is formed by peaks arranged in rows, wherein each peak has a flat top and is spaced from any adjacent peak in the same row by a valley. The average valley thickness of the valleys in both the shoulder support area and the tail support area are less than the average valley thickness of the valleys in the general support area. In another embodiment, the shoulder and tail support areas are formed by parallel ribs separated and bounded by areas comprising flat-topped peaks and valleys. Another aspect of the invention is a method of manufacturing convoluted foam pads including compressing a foam block between two rollers having radially extended fingers of varying effective heights, cutting the compressed block into halves having varying peak heights and valleys having varying valley floor heights, and cutting the tops of the peaks off the create areas having lower volumes of foam than other areas.
U.S. Pat. No. 4,660,887, issued to Fleming, et. al., titled “Ergonomic support”
In the patent to Fleming, an ergonomic support in the nature of chairs, sofas and the like, includes flexible and resilient posterior and lumbar supporting portions having non-planar, contoured shaped surfaces which comfortably conform to the body. The supporting portion is shaped to form a plurality of cantilevers which automatically adjust and conform to body movement without mechanical parts
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