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:
Jun. 05, 2001
Filed:
May. 17, 1999
Ulrich Hiltemann, Wermelskirchen, DE;
Abstract
A radial piston pump includes cylinders oriented radially to an axis of rotation of an eccentric shaft and pistons arranged radially movably in the cylinders against the force of a spring member such that the pistons are pressed radially outwards by the rotational movement of an eccentric and radially inwards by the spring members. The pistons have at least one inlet opening connected to an inlet chamber of a pumping medium in the radially inner position of the pistons, and the pumping medium is pressed into a pressure area during the radially outward movement of the pistons. An eccentric shaft is mounted in sliding bearings arranged on both sides of the eccentric and the shaft is traction driven. A pressure connection between an annular duct and one of the sliding bearings advantageously provides a bearing gap between the sliding bearing and the eccentric shaft to constantly supply a close film of oil which has a damping effect upon the radial movements of the eccentric shaft. Thus, there is less noise due to the mechanical contact of the eccentric shaft with the sliding bearing.