1
Richard D Relyea: Interactive exercise device. Aerobitronics, Gunn Lee & Jackson, October 11, 1983: US04408613 (116 worldwide citation)

In the preferred and illustrated embodiments, an interactive exercise device is disclosed. One embodiment utilizes an exercise bicycle wherein wheel speed and force are monitored. An electromagnetic brake is adjusted by a control apparatus to relate the measured force to the required force. The elec ...


2
J R Reneau, Richard D Relyea: Total resistance gym. Bullseye Gun Centers, Gunn Lee & Jackson, October 11, 1983: US04408759 (17 worldwide citation)

In the preferred and illustrated embodiment of an exercise device, a free standing frame with adjustable resistance assemblies mounted to the frame is disclosed. Resistance in all directions is provided by a linear drag brake and a rotary drag brake. The linear drag brake comprises a slide bar recip ...


3
Gary D Smith, Richard D Relyea: Blowout preventer control system. Ross Hill Controls Corporation, Gerald G Crutsinger, John F Booth, Monty L Ross, November 8, 1983: US04413642 (13 worldwide citation)

A method and apparatus to control delivery of pressurized hydraulic fluid at a controlled pressure to open and close blowout preventers. A source of pressurized hydraulic fluid is connected through a pair of supply lines and through a control shifter valve for charging a closed system to a set-point ...