Vacuum pump for a vehicle with multiple one-way valves

Details Vacuum pump for a vehicle with multiple one-way valves Vacuum pump for a vehicle with multiple one-way valves

2011-04-05

2011-04-05

Denion, Thomas E (Department: 3748)

Rotary expansible chamber devices

Miscellaneous

Reexamination Certificate

active

07918659

ABSTRACT:
The invention relates to a vacuum pump (1) for vehicle motors, comprising a stator (2), a chamber defined within said stator (2) and at least one vane rotatably mounted inside said chamber so as to generate a depression. The stator (2) comprises inlet openings for air and oil, and a first discharge outlet (30) on which a first one-way valve operates (35). According to the invention, the stator (2) further comprises a second discharge outlet (50) separate from said first discharge outlet (30) and a second one-way valve (55) operating on said second discharge outlet (50). In this manner it is possible to separate the air discharge from the oil discharge, both physically and operationally. The invention further relates to a one-way valve for said vacuum pump. Such valve comprises a blade body (60) having a first blade which defines a first one-way valve (35) and at least one second blade which defines at least one second one-way valve (55).

REFERENCES:
patent: 3809511 (1974-05-01), Hess
patent: 5466135 (1995-11-01), Draskovits et al.
patent: 5605450 (1997-02-01), Edwards
patent: 5769617 (1998-06-01), Glen
patent: 3819623 (1989-07-01), None
patent: 4019854 (1991-01-01), None
patent: 9311376 (1993-09-01), None
patent: 0206154 (1986-06-01), None
patent: 2107789 (1983-05-01), None
patent: 2002371965 (2002-12-01), None
patent: 2004270453 (2004-09-01), None
PCT International Search Report for PCT/IT2006/000380, Jul. 9, 2006.

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