04691694 is referenced by 142 patents and cites 28 patents.

A muscle exercise and rahabilitation apparatus includes a movable fixture against which a force can be applied; a servo motor having an output shaft coupled to the fixture; a strain gauge effectively coupled between the output shaft and the fixture for producing a load signal corresponding to the force applied to the fixture; a speed detector for producing a velocity signal corresponding to the speed of the fixture; a closed loop servo circuit for controlling the motor in response to the load and velocity signals to regulate the velocity of the fixture; a limit circuit for preventing movement of the fixture past opposite limits; a storage circuit for storing limit signals corresponding to each limit; a limit setting circuit for enabling the storage circuit to store each limit upon movement of the fixture thereto; a position sensing circuit for producing a position signal corresponding to the position of the fixture; a deceleration circuit for slowing down movement of the fixture as the fixture approaches each limit, in response to the velocity, position and limit signals; detecting circuits for detecting a plurality of predetermined operational faults of the apparatus; an emergency stop circuit for terminating operation of the apparatus upon detection of some of the operation faults; a dynamic brake for braking the servo motor to stop movement of the fixture in response to the emergency stop circuit; and a stop circuit for controlling the motor to stop movement of the fixture upon detection of other operation faults.

Title
Muscle exercise and rehabilitation apparatus
Application Number
676493
Publication Number
4691694
Application Date
September 15, 1986
Publication Date
September 8, 1987
Inventor
Daniel Y Gezari
Chevy Chase
MD, US
Richard Krukowski
Chatham
NJ, US
Robert L Boyd
Woodcliff Lake
NJ, US
Agent
Cobrin & Godsberg
Assignee
Biodex Corporation
NY, US
IPC
A63B 23/00
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