The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 14, 2014
Filed:
Apr. 05, 2007
David Heaps, Haworth, GB;
John Hegarty, Wakefield, GB;
David Heaps, Haworth, GB;
John Hegarty, Wakefield, GB;
Wabco Automotive UK Limited, Morley, Leeds, GB;
Abstract
A vacuum pump () suitable for mounting at a lower region of an engine such as in the oil sump of an engine. The vacuum pump () includes a casing () having a cavity () containing a movable member (), wherein the cavity () is provided with an inlet () and an outlet () and the movable member () is movable to draw fluid into the cavity () through the inlet () and out of the cavity () through the outlet () so as to induce a reduction in pressure at the inlet. The vacuum pump () is further provided with an oil feed conduit () to supply oil to the cavity (), the oil feed conduit () being provided with a valve () to prevent the flow of oil to the cavity () during periods when the pump is not operating.