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:
Apr. 02, 2019
Filed:
Jun. 13, 2013
Pierburg Pump Technology Gmbh, Neuss, DE;
PIERBURG PUMP TECHNOLOGY GMBH, Neuss, DE;
Abstract
A variable lubricant vane pump which provides a pressurized lubricant for an engine includes a pump housing comprising a pump chamber. The pump chamber comprises pump compartments which rotate from a charge zone to a discharge zone. The pressurized lubricant is discharged from the pump compartments into an outlet cavity. A control ring envelopes the pump chamber and shifts between high and a low pumping volume position. A pump rotor comprises radially slidable vanes which rotate in the control ring. A pressure control chamber pushes the control ring into the high pumping volume direction. A control valve connects or disconnects the pressure control chamber to a lubricant tank. A pilot chamber pushes the control ring into the low pumping volume direction. A pilot chamber channel connects the outlet cavity with the pilot chamber. A control chamber channel connects the outlet cavity with the pressure control chamber.