US Patent 5501650
Invented by Gellert; Reinhard R. , Arlington Heights, IL
Patent issued on March 26, 1996

A variable speed motor powering a crankshaft driven sealed transducer producing pneumatically induced reciprocating motion of a receiver when a male organ is inserted. The present invention employs a hermetic system to prevent loss of synchronization. The receiver is designed with an inner liner compliant enough to accommodate a plurality of sizes and shapes of male penises. The present invention produces a stroke of approximately 3 inches at a frequency of up to 350 per minute.

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