Vacuum pressure selection and generation device

Details Vacuum pressure selection and generation device Vacuum pressure selection and generation device

1981-02-25

1983-04-19

Look, Edward K.

Pumps

One fluid pumped by contact or entrainment with another

Diverse pumps

60397, 123389, 180177, 417151, 417185, F04F 554

Patent

active

043804187

ABSTRACT:
An aspirator using positive pressure from a suitable source generates a vacuum pressure when the primary source of vacuum pressure, typically the engine intake manifold, prodcuces insufficient vacuum pressure to operate a device such as a road speed control servomotor. The aspirator assembly is connected to the source of positive pressure and the engine intake manifold as well as to atmosphere and to the device to be operated by vacuum power. When there is sufficient intake manifold vacuum pressure for the desired purpose, there is no flow through the aspirator and the engine intake manifold supplies all of the vacuum needs of the servomotor. When aspirator vacuum pressure is required due to insufficient manifold vacuum pressure, the aspirator is opened to generate aspirated vacuum pressure and the connection between the servomotor and manifold vacuum is closed. The aspirated air is delivered to the engine intake manifold.

REFERENCES:
patent: 1820884 (1931-08-01), Hueber et al.
patent: 4134470 (1979-01-01), Riddel
patent: 4220218 (1980-09-01), Riddel
patent: 4328669 (1982-05-01), Mort

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