Exhaust gas operated vacuum pump assembly

Details Exhaust gas operated vacuum pump assembly Exhaust gas operated vacuum pump assembly

1982-09-29

1985-03-05

Cohen, Irwin C.

Pumps

Motor driven

Fluid motor

92130R, 92130B, 92143, 417399, 417401, F04B 3500, F04B 3900

Patent

active

045028478

ABSTRACT:
A vacuum pump assembly which is driven by pulsating exhaust gases emanating from an internal combustion engine is disclosed. The pump assembly includes a staged pump means for pumping air from a vacuum source and having a reciprocable pumping member, an actuating means including a reciprocable actuating member drivingly connected to the pumping member and which is driven through first and second strokes to move the pumping member through first and second strokes, respectively, one side of the actuating member being in communication with the exhaust gases and with the actuating and pumping members being movable through their first strokes during the pressure increasing phase of each pressure pulsation and being moved through their second strokes by a nonlinear variable rate spring means during each pressure decreasing phase of each pressure pulsation whereby the pump assembly is operable to pump air from the vacuum source throughout a wide range of engine speeds and loads including high speeds and loads.

REFERENCES:
patent: 474248 (1892-05-01), Henderson
patent: 2142329 (1939-01-01), Nika, Jr. et al.
patent: 3106821 (1963-10-01), Ridgway
patent: 3238886 (1966-03-01), Johnson
patent: 3244357 (1966-04-01), Bunker
patent: 3250224 (1966-05-01), Phillips et al.
patent: 3339830 (1967-09-01), Graham
patent: 4156416 (1979-05-01), Weisgerber
Carlson, H., Spring Designer's Handbook, N.Y., Dekker, Inc., 1978, p. 185.

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