3791375 is referenced by 102 patents and cites 10 patents.

Warning of excessive ambulation force, for limiting the application of weight on a lower extremity, usually in the recovery from orthopedic surgery of the lower extremity, is accomplished by a fluid-containing load cell which deflects and changes its volume in accordance with the amount of load thereon. A tubular connector connects the load cell fluid with a displacement-measuring device, for example, a bellows. A particular displacement limit, conveniently signaled with an electrical alarm indicates when predetermined load on the cell is reached.

Title
Device for sensing and warning of excessive ambulation force
Application Number
05/184,662
Publication Number
3791375
Application Date
September 29, 1971
Publication Date
February 12, 1974
Inventor
Pfeiffer Erich A
Agent
Shapiro Allan M
IPC
A61b 05/10
A61B 05/103
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