Adjustable throttle valve

Details Adjustable throttle valve Adjustable throttle valve

1983-09-09

1987-05-05

Scott, Samuel

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

251 63, 251 43, 251 44, F16K 3102, F16K 31122

Patent

active

046626000

ABSTRACT:
An adjustable throttle valve is controlled by a low pressure control pressure acting on a spring urged adjusting cylinder for positioning the end of a follow-up piston adjacent the end of a discharge channel extending the length of a throttle piston; power fluid flows from a source through a discharge opening between a housing and the throttle piston with the spring force, the control pressure, infeed pressure and discharge pressure acting in concert to maintain the end of the follow-up piston adjacent but slightly spaced from the end of the discharge channel for maintaining throttle piston equilibrium.

REFERENCES:
patent: 1925301 (1933-09-01), Campbell
patent: 2630137 (1953-03-01), Kronce et al.
patent: 2805038 (1957-09-01), Towler et al.
patent: 2969088 (1961-01-01), Kramer
patent: 3076630 (1963-02-01), Hammond
patent: 3367354 (1968-02-01), Gallant
patent: 3389796 (1968-06-01), Fiala et al.
patent: 3405906 (1968-10-01), Keller
patent: 3787027 (1974-01-01), Curnow et al.
patent: 4250914 (1981-02-01), Ferrentino
patent: 4311296 (1982-01-01), Scheffel
patent: 4362088 (1982-12-01), Budzich

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