Motors: expansible chamber type – With motive fluid valve – Plural separately controlled waste passages for single...
Patent
1987-08-21
1988-07-12
Look, Edward K.
Motors: expansible chamber type
With motive fluid valve
Plural separately controlled waste passages for single...
55417, 55484, 55487, 91454, 91459, 137550, 251118, F15B 1108
Patent
active
047562331
ABSTRACT:
Disclosed is an air filter unit for a pressure actuator such as a vacuum actuator for a speed control of an automobile comprising a solenoid 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. A filter element holder defining a pair of receptacles for receiving filter elements therein is attached to the solenoid valve unit so as to intercept air flow from an external air source into the vacuum chamber by way of the solenoid valves. The filter element for a vent valve which is frequently used is finer in structure than that for a safety valve which is less frequently used and is required to be capable of rapid introduction of air into the vacuum chamber. Preferably, the end wall of the receptacle, having a hole which communicates the pressure chamber with the external relatively positive air source, is provided with a step defining a clover shaped space between the filter element and the bottom surface of the receptacle for increasing the surface area of the filter element presented to the air flow for reducing the flow resistance of the filter element and increasing the durability of the filter element through prevention of local clogging of the filter element.
REFERENCES:
patent: 3365864 (1968-01-01), Iizima
patent: 3692043 (1972-09-01), Waskowsky
patent: 4141703 (1979-02-01), Mulchi
patent: 4346775 (1982-08-01), Treadwell
patent: 4431077 (1984-02-01), Burney
patent: 4543983 (1985-10-01), Pauliukonis
Nishiyama Toshio
Takahashi Yoshikazu
Look Edward K.
Mitsuba Electric Mfg. Co. Ltd.
LandOfFree
Air filter system for a vacuum actuator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Air filter system for a vacuum actuator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Air filter system for a vacuum actuator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-658335