Claims
- 1. A valve module including: a housing; a valve shaft rotatably mounted in said housing; an electric motor coupled to said valve shaft to turn the valve shaft in one direction when the motor is energized; spring means coupled to said valve shaft to turn the valve shaft in the opposite direction when the motor is de-energized; limiting means mounted in said housing for limiting the angular movement of said shaft by said motor and said spring means to a predetermined arc; a first valve mounted in said module and controlled to close when fluid pressure is introduced thereto and to open when the fluid pressure is relieved; and a multiple-port disc valve coupled to said valve shaft to be opened and closed by rotation of said valve shaft through said arc, said disc valve comprising a fixed disc mounted in said housing having a plurality of ports therein, including a drain port, a pressure port, a pair of valve ports, and a further port coupled to said first valve, and a rotary disc mounted in said housing on said valve shaft in facing coaxial engagement with said fixed valve and having first and second passages formed on the surface thereof adjacent to said fixed disc for interconnecting the valve ports to the drain port and the pressure port to said further port when the rotary disc is in a first angular position, and for interconnecting said further port to said drain port and for closing said valve ports and said pressure port in the fixed disc when the rotary disc is turned through said arc to a second angular position.
- 2. The valve module defined in claim 1, in which said electric motor is constructed to stall after said valve shaft has been turned through said arc when the motor is energized, and to remain stalled until the motor is de-energized.
Parent Case Info
This is a division of copending application Ser. No. 864,719 filed Dec. 27, 1977 now U.S. Pat. No. 4,191,166.
US Referenced Citations (6)
Divisions (1)
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Number |
Date |
Country |
Parent |
864719 |
Dec 1977 |
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