Lower back support
Patent 5573302 Issued on November 12, 1996. Estimated Expiration Date: 
November 8, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 8, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3206247 3348880 3393938 3724144 Backrest Flexible elastic support Lordosis-support backrest for a vehicle seat Transmission device for cable control of lumbar support mechanism Mechanism for providing adjustable lumbar support in a seat Adjustable cushion assembly for a chair InventorsApplicationNo. 337484 filed on 11/08/1994US Classes:297/230.14, Including a means to adjust supplemental back relative to a seat back24/575.1, Including eyelet (e.g., shoes)297/284.5, Portable with seat attacher297/284.7Rectilinear vertical adjustmentExaminersPrimary: Chen, Jose V.Assistant: Allred, David E. Attorney, Agent or FirmForeign Patent References
International ClassA47C 007/46AbstractAn adjustable attachment has been developed which can be used in combination with an auxiliary backrest to suspend the backrest from a fixed backrest normally found on a chair or wheelchair. The support structure includes an elongate receiver and a hanger. The receiver extends longitudinally and is normally fixed in a vertical position to the auxiliary backrest and defines a plurality of openings spaced apart along the length of the receiver to form a row of openings. The hanger is shaped to fit in any one of the receiver openings and the receiver has an outer part so that in use the hanger can be engaged through a selected one of the openings. The hanger then extends along the length of the receiver and the outer part can be engaged downwardly over an upper edge of a fixed backrest or other support. The structure is also disclosed in combination with an adjustable auxiliary backrest having a resiliently deformable vertical spine and ribs having forwardly and outwardly extending end portions to give lateral support to the user.Field of SearchProviding support for lower back (i.e., lumbar) regionPortable with seat attacher Rectilinear vertical adjustment Including a projected side member Including a rigid panel Back and supplemental back together form occupant back-engaging surface Including a means to adjust supplemental back relative to a seat back Back-connected U-clamp mounted Adjustable | |
