Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
253 words
In a back support control mechanism for a chair or the like in which said back support is mounted for movement toward and away from a seat, the improvement for providing adjustable positioning of said back support with respect to said seat in an infinite number of positions in a range of movement of said back support comprising a channel member fixed with respect to said seat, a pressure pad positioned within said channel member and fixed with respect to said back support, said channel member permitting sliding movement of said pressure pad with respect thereto resulting in movement of said back support over said range of movement, and a lever coupled to said pressure pad and movable therewith and with respect thereto and having a cam surface thereon which, in one position of said lever with respect to said pressure pad, bears against said pressure pad, causing the latter to bear against said channel member to fix said pressure pad in position with respect to said channel member and to prevent further movement of said pressure pad, thereby fixing the position of said back support with respect to said seat, in which said back support comprises a tubing that includes a carrier therein that holds said pressure pad, said carrier includes side rails, with said pressure pad being supported between said side rails, said channel member is positioned within said tubing, and said channel member includes tracks along the sides thereof, and said side rails of said carrier ride along said tracks.
Claim 2
Dependent Claim
253 words
In a back support control mechanism for a chair or the like in which said back support is mounted for movement toward and away from a seat, the improvement for providing adjustable positioning of said back support with respect to said seat in an infinite number of positions in a range of movement of said back support comprising a channel member fixed with respect to said seat, a pressure pad positioned within said channel member and fixed with respect to said back support, said channel member permitting sliding movement of said pressure pad with respect thereto resulting in movement of said back support over said range of movement, and a lever coupled to said pressure pad and movable therewith and with respect thereto and having a cam surface thereon which, in one position of said lever with respect to said pressure pad, bears against said pressure pad, causing the latter to bear against said channel member to fix said pressure pad in position with respect to said channel member and to prevent further movement of said pressure pad, thereby fixing the position of said back support with respect to said seat, in which said back support comprises a tubing that includes a carrier therein that holds said pressure pad, said carrier includes side rails, with said pressure pad being supported between said side rails, said channel member is positioned within said tubing, and said channel member includes tracks along the sides thereof, and said side rails of said carrier ride along said tracks.
Claim 3
Dependent Claim
55 words
A back support control mechanism according to claim 1, in which said pressure pad includes a cavity therein, and a spring plate positioned within said cavity and bearing against spaced points therein, said cam surface of said lever bearing directly against said spring plate to apply pressure against said pressure pad at said spaced points.
Claim 4
Dependent Claim
28 words
A back support control mechanism according to claim 2, in which said spaced points are defined by ledges, permitting the bowing of said spring plate between said ledges.
Claim 5
Dependent Claim
46 words
A back support control mechanism according to claim 1, in which said channel member includes a stop pin therein, and said pressure pad is slotted for a length limiting said range of movement of said back support, and said stop pin is positioned within said slot.