Vacuum pump and method of operating the same

Details Vacuum pump and method of operating the same Vacuum pump and method of operating the same

1982-12-16

1984-11-20

Cline, William R.

Rotary expansible chamber devices

Heat exchange or non-working fluid lubricating or sealing

With condition responsive control of non-working fluid

418 87, 418 88, 418 97, 417281, 417295, 417298, 417299, F01C 2104, F04C 2702, F04C 2502

Patent

active

044836678

ABSTRACT:
A vacuum pump comprises a suction nipple valve including a cylinder, a piston slidably received therein and a movable valve closing member operatively connected to the piston. The vacuum pump further has a pressure medium conduit having a first end communicating with the cylinder; an inlet opening at a second end of the conduit for pressure medium to flow through the inlet opening to the piston; a control arrangement for closing and opening the inlet opening dependent upon run or standstill of the vacuum pump. In the closed state of the inlet opening an oil quantity is maintained above the inlet opening.

REFERENCES:
patent: 930843 (1909-08-01), Cook
patent: 3105630 (1963-10-01), Lowler et al.
patent: 3168236 (1965-02-01), Lamberton et al.
patent: 3191854 (1965-06-01), Lowler et al.
patent: 3707339 (1972-12-01), Budgen
patent: 4366834 (1983-01-01), Hanson
H. Wycliffe and B. D. Power, Pumped Oil Feed Systems for Rotary Vacuum Pumps, Apr. 1981, pp. 1160-1162.

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