Valves and valve actuation – Fluid actuated or retarded – Pilot or servo type motor
Patent
1982-09-24
1985-08-20
Schwadron, Martin P.
Valves and valve actuation
Fluid actuated or retarded
Pilot or servo type motor
251 63, 251 26, F16K 31124
Patent
active
045359660
ABSTRACT:
A hydraulic throttle valve is disclosed which includes a choke piston slideably mounted in a bore for movement between an open position and a closed position. A differential piston is coaxially mounted with respect to the choke piston, and a control valve is mounted for slideable movement in a second bore which is laterally spaced from and parallel to the first bore. The control valve is operated by an electromagnet to selectively direct a control fluid to either side of the differential piston, and thereby open or close the choke piston. A feedback spring arm interconnects the choke piston and the control valve, with the spring arm resisting the opening of the choke valve and with the resisting force being a function of the force applied to the control valve by the electromagnet. A balance of forces acting on the choke piston is thereby achieved, with the choke piston being opened to an extend functionally related to the magnitude of the input current to the electromagnet. A shuttle valve is also provided which is operatively connected to each of the hydraulic inlet channel and the hydraulic outlet channel of the throttle valve, with the output of the shuttle valve being operatively connected to the control valve. The shuttle valve acts to connect that one of the inlet and outlet channels having the higher pressure, to the control valve.
REFERENCES:
patent: 607265 (1898-07-01), McLean
patent: 3604459 (1971-09-01), Rosaen
patent: 3684238 (1972-08-01), Michellone et al.
patent: 4070000 (1978-01-01), Prescott
Oelhydraulik und Pneumatik, 25 (1981) Nr. 1, pp. 34-36.
Eich Otwin
Post Karl-Heinz
Barmag Barmer Maschinenfabrik Aktiengesellschaft
Schwadron Martin P.
Starsiak Jr. John S.
LandOfFree
Throttle valve does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Throttle valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Throttle valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-556568