Mechanical primary vacuum pump including a spring-loaded non-ret

Details Mechanical primary vacuum pump including a spring-loaded non-ret Mechanical primary vacuum pump including a spring-loaded non-ret

1989-01-04

1990-05-01

Smith, Leonard E.

Pumps

One fluid pumped by contact or entrainment with another

Diverse pumps

417432, F04B 4106

Patent

active

049214063

ABSTRACT:
The invention relates to a mechanical vacuum pump having a displacement member (2) and a casing (1) which is provided with an inlet channel (3) on the suction side and an outlet channel (4) on the discharge side. A spring-loaded non-return flap valve (5) is incorporated into the outlet channel (4). Upstream of this flap (5), a gas jet pump (7, 8) is installed in the outlet channel (4), the jet direction being parallel to the sealing surface of the non-return flap valve (5).

REFERENCES:
patent: 3556681 (1971-01-01), Jennings
patent: 4770609 (1988-09-01), Uchida et al.

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