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US 5,467,797 AGranted
Two-position three-way solenoid valve
AssigneeGeneral Motors Corporation
InventorsViswanath Seetharaman, David F. Reuter
Life of this patent
Estimating the term…
Abstract
A solenoid valve is provided which achieves the function of a two-position, three-way directional control valve and functions at high pressures with low leakage rates. In addition, the valve provides a cost effective and simplified configuration to additionally achieve the functions of a free-flowing forward check valve and a high pressure relief valve integrated with the directional control valve. The invention is directed towards providing a valve with low cost and a minimum penalty with regards to electrical power consumption.
Claims14
A directional control valve comprising:
- a housing;
- a solenoid actuator engaging the housing;
- a valve member contained within the housing and actuated by the solenoid actuator providing directional flow control;
- an integral check including a lip seal engaging the housing and permitting a flow in one direction between the lip seal and the housing bypassing the valve member;
- and
- an integral pressure relief including the valve member captured between a first valve seat and a second valve seat with a first spring forcing the valve member toward the first valve seat and a second spring forcing the valve member toward the second valve seat.
3 more elements
A valve comprising:
- a housing;
- a first valve seat formed by the housing with a first opening therethrough;
- a second valve seat contained in the housing with a second opening therethrough;
- an obturator alternatively positionable against the first and second valve seats to alternatively close the first and second openings;
- a first spring forcing the obturator toward the first valve seat;
- a second spring forcing the obturator toward the second valve seat;
- and
- a check including a lip seal providing a one-way flow route in parallel to the second opening.
5 more elements
A valve comprising:
- a housing having a cavity with a first valve seat formed in the cavity and having a first opening therethrough forming a first flow passage segment through the first opening;
- an insert with a second valve seat having a second opening therethrough forming a second flow passage segment and positioned in the cavity such that the first valve seat and the second valve seat are disposed in an opposed, facing relationship;
- an obturator captured between the first valve seat and the second valve seat alternatively positionable to close the first opening and the second opening;
- and
- a lip seal positioned in the cavity providing a one-way flow passage segment in parallel with the second flow passage segment.
2 more elements
A valve having first, second and third ports comprising:
- a first valve seat with a first opening therethrough;
- a second valve seat with a second opening therethrough;
- an obturator having a normal position against the first valve seat establishing fluid communication between the first and second ports through the second opening;
- a solenoid, when energized effecting a second position of the obturator against the second valve seat establishing fluid communication between the first port and the third port through the first opening;
- and
- a lip seal check positioned between the first port and the second port providing a bypass flow path around the second opening permitting fluid communication from the first port to the second port through the bypass flow path and preventing fluid communication from the second port to the first port through the bypass flow path.
3 more elements
A valve having first, second and third ports and first and second operative positions comprising:
- an obturator;
- a first valve seat engageable by the obturator;
- a first spring applying a first force on the obturator directed toward the first valve seat;
- a second valve seat engageable by the obturator;
- a second spring applying a second force on the obturator directed toward the second valve seat wherein the first force normally overcomes the second force to position the obturator against the first valve seat to the first operative position wherein fluid communication is established between the first and second ports;
- an actuator selectively operable to counteract the force of the first spring wherein the second spring positions the obturator against the second valve seat to the second operative position when the actuator is operated wherein fluid communication is thereby established between the first and third ports;
- and
- a lip seal check positioned between the first and second ports through which fluid communication is established from the first port to the second port and through which fluid communication is prohibited from the second port to the first port in both of the first and second operative positions;
- wherein, in the second operative position fluid communication is established through the second valve seat between the second and the first and third ports when a fluid pressure at the second port is sufficient to move the obturator to compress the second spring and move off the second valve seat.
6 more elements
Dependencies are inferred from the claim text.