Seat spring member
AssigneeHoover Ball and Bearing Company
InventorsJack C. Mandusky, Neville L. Riddle
Life of this patent
Estimating the term…
Abstract
A seat spring for a seating structure having front and rear frame rails wherein the spring is constructed from a one piece wire body shaped to form a front end fishmouth portion mounted on the front rail, a yieldable rear end portion mounted on the rear frame rail and a variable length main portion extending between the front and rear portions. The fishmouth portion and the front end of the main portion are configured so that when the spring is deflected in response to a downwardly directed seating load, the spring will bottom out on the front frame rail without any wire-to-wire engagement of portions of the spring during deflection. The result is a limited deflection spring which, under shock load, will deflect without any noise.
Claims11
In a seat spring assembly for a seating structure having front and rear frame rails, a seat spring mounted on and extending between said frame rails, said seat spring being of one piece formed wire construction and having torsion bars arranged in an alternating relation with connecting bars, said bars being relatively arranged so that said spring has a fishmouth shape front portion comprised of a lower section which extends rearwardly from said front rail and terminates in a juncture torsion bar and an upper section which extends upwardly and forwardly from said juncture torsion bar and terminates in a mounting torsion bar, said upper section including a connecting bar formed integral with one end of said mounting torsion bar and located in a vertical plane on one side of said lower section, said spring having a main body portion which extends rearwardly from said mounting torsion bar and a rear portion mounted on said rear frame rail, said main body portion including a connecting bar formed integral with the other end of said mounting torsion bar and located in a vertical plane on the other side of said lower section so that on deflection of said spring assembly said connecting bars formed integral with said mounting torsion bar will move in a clearance relation with said lower section.
A seat spring member comprising a one piece wire body of formed wire construction having a plurality of torsion bars arranged in an alternating relation with connecting bars and shaped to form a spring member having a fishmouth front end portion, a rear end portion, and a main portion extending between said front and rear end portions, said fishmouth front end portion having a lower section provided with spring mounting means on the forward end thereof and a juncture torsion bar at the rear end thereof, said front end portion also having an upper section extending upwardly and forwardly from said juncture torsion bar and terminating at the upper end thereof in a mounting torsion bar, said upper section deflecting toward said lower section when said spring member is subjected to load and being movable downwardly to a position in which said mounting torsion bar is in substantial horizontal alignment with said spring mounting means, said upper section moving downwardly during said deflection in clearance relation with said lower section, said main portion being integral with said mounting torsion bar and extending rearwardly therefrom, said main portion including a plurality of transversely extending torsion bars and a substantially straight section extending between a pair of said torsion bars, and spring mounting means on the terminal end of said rear end portion.
Dependencies are inferred from the claim text.