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:
Mar. 27, 2001
Filed:
Feb. 25, 1999
Applicant:
Inventors:
Heinz Klaus, Vienna, AT;
Gerald Buha, Steyr, AT;
Assignee:
TCG Unitech Aktiengesellschaft, Kirchdorf/Krems, AT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04B 4/900 ; F04B 2/304 ;
U.S. Cl.
CPC ...
F04B 4/900 ; F04B 2/304 ;
Abstract
The invention relates to an oil pump for an internal combustion engine with at least one pair of toothed wheels which are in mutual engagement, at least one intake port and at least one outlet port. An improved supply of oil at reduced driving power can be achieved with at least two pairs of toothed wheels; a first common shaft, which a first toothed wheel of each pair of toothed wheels is arranged, and means are provided to charge the individual pairs of toothed wheels with oil depending on the required quantity of conveyed oil.