Motors: expansible chamber type – With motive fluid valve – Two hand control
Patent
1977-06-20
1979-01-30
Cline, William R.
Motors: expansible chamber type
With motive fluid valve
Two hand control
137111, F16K 1700
Patent
active
041366018
ABSTRACT:
A no tie down valve or device for the actuation of hazardous machinery. The device comprises a spool moving within a cylindrical cavity having capped ends; input ports, an output port, and an exhaust port are located at suitable positions on the cylindrical cavity wall such that a pressurized output can only be obtained if both inputs are pressurized, and subsequently held, within a small time interval determined by design parameters of the device. An equivalent construction in terms of poppet or diaphragm-type seals, which is inherently more reliable and maintainance-free than spool construction, is also described.
REFERENCES:
patent: 2778372 (1957-01-01), Jaquith
patent: 3273582 (1966-09-01), Valentine
patent: 3848848 (1974-11-01), DeTirro
Cline William R.
Van Der Wall Robert J.
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