Back muscle exercising and stretching apparatus
Patent 5100131 Issued on March 31, 1992. Estimated Expiration Date: 
June 12, 2011. 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.
June 12, 2011. 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 ReferencesSpinal exercising apparatus Therapeutic back rest Patent #: 4927139 InventorApplicationNo. 713884 filed on 06/12/1991US Classes:482/112, Confined hydraulic or pneumatic chamber482/134, Including stationary restraint for user482/137, About a horizontal axis482/139User interface elementExaminersPrimary: Apley, Richard J.Assistant: Donnelly, Jerome Attorney, Agent or FirmForeign Patent References
International ClassA63B 000/23AbstractA back muscle exercising and stretching apparatus comprises a stationary seat upon which a user may sit, a backrest movably attached to the seat, and a resistance means, such as a hydraulic or pneumatic spring, movably attached to the seat and the backrest to define the force required to move the backrest relative to the seat. The user may sit either facing toward or away from the backrest and then bend either forward or backward to cause the backrest to move from a substantially vertical position to a substantially horizontal position. Higher resistances may be used to effect exercise and lower resistances may be used to effect stretching. The apparatus may be placed in a convex table-like orientation such that the user may lay face up thereon to effect stretching of the back muscles. An optional headrest increases comfort and permits the patient to exercise and stretch portions of the upper back and neck. | |
