Vacuum actuator for vehicle speed control

Details Vacuum actuator for vehicle speed control Vacuum actuator for vehicle speed control

1987-08-21

1989-01-24

Look, Edward K.

Motors: expansible chamber type

With motive fluid valve

Plural separately controlled waste passages for single...

91454, 91459, 137315, 1374546, 180175, 439 64, 439377, F15B 1108

Patent

active

047994185

ABSTRACT:
Disclosed is a pressure actuator such as a vacuum actuator comprising a valve unit including a plurality of solenoid valves and a diaphragm unit including a diaphragm defining a pressure chamber, air pressure within the pressure chamber being adjusted by selective activation of the solenoid valves which communicate the pressure chamber with pressure sources of different pressure levels, in which a casing of the actuator defines an accommodating chamber for accommodating the solenoid valve unit and a wall surface of the chamber is provided with ribs for guiding and positioning the solenoid valve unit inside the chamber. The ribs may be adapted to make a sliding contact with a side surface of the yokes of the solenoid valves and a smooth surface a printed circuit board which is attached to the solenoid valve unit. Alternatively or additionally, the ribs may be adapted to be fitted into a gap between a pair of adjacent yokes of the solenoid valves. These ribs facilitate the assembly of the solenoid valve unit into the casing, assure the mechanical stability of the actuator and remove the possibility of creating particles as a result of abrasion between the solenoid valve unit and the casing at the time of assembly.

REFERENCES:
patent: 3758716 (1973-09-01), James et al.
patent: 4158192 (1979-06-01), Muta
patent: 4346775 (1982-08-01), Treadwell
patent: 4431077 (1984-02-01), Burney
patent: 4464832 (1984-08-01), Asick et al.
patent: 4543983 (1985-10-01), Pauliukonis
patent: 4697478 (1987-10-01), Mastumoto et al.
patent: 4710136 (1987-12-01), Suzuki

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