Engine driven vacuum pump

Details Engine driven vacuum pump Engine driven vacuum pump

1977-09-09

1979-05-29

Lazarus, Ronald H.

Internal-combustion engines

Lubricators

Crankcase, pressure control

F01M 100

Patent

active

041564162

ABSTRACT:
An engine driven vacuum pump combining a two-stage, low noise demountable pump assembly with a camshaft driven eccentric drive arrangement having internal oil distribution and pumping means for lubricating the drive and pump pushrod elements. A check valve in the cover of the pump assembly defines a second stage pumping chamber which increases pump efficiency while at the same time cyclically closing the pump outlet to reduce external noise attributable to gas discharge from the primary pumping chamber.

REFERENCES:
patent: 961000 (1910-06-01), Oddie
patent: 3018779 (1962-01-01), Tyler

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