Exerciser for lower leg, ankle, and foot muscles
Patent 4186920 Issued on February 5, 1980. Estimated Expiration Date: 
November 21, 1997. 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 21, 1997. 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 ReferencesInventorsApplicationNo. 05/853450 filed on 11/21/1977US Classes:482/79, FOR FOOT OR ANKLE403/138, Spring-biased seat opposite ball stud482/117, Ball and socket friction elements601/34LegExaminersPrimary: Johnson, Richard J.International ClassesA63B 22/18 (20060101)A63B 22/00 (20060101) A63B 21/012 (20060101) A63B 21/015 (20060101) AbstractAn exerciser for use in the rehabilitation of the leg, ankle, and foot muscles has a foot support connected to a base of a ball and socket joint enabling the support to be tilted in any direction by a foot supported thereby. The joint includes a threaded member operable to provide selected resistance to such tilting and a pointer and scale are also provided to enable the resistance to be correlated to the size of the supported foot. | |
