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. 06, 2007
Filed:
Dec. 20, 2002
Bernard Allart, Crepy-en-Valois, FR;
Louis Bigo, Compiegne, FR;
Bernard Allart, Crepy-en-Valois, FR;
Louis Bigo, Compiegne, FR;
Poclain Hydraulics Industrie, Verberie, FR;
Abstract
A hydraulic motor having radial pistons, and comprising a cam, a cylinder block and a distributor. The cylinders of the cylinder block are connected to communication orifices (A) situated in a communication face of the cylinder block, while the distributor has a distribution face in which distribution orifices (A,A) are provided that are suitable for communicating with the communication orifices for rotating the motor. The cam is provided with a plurality of lobes (), each of which has two ramps (), each ramp corresponding to a distribution orifice (A,A). The edge of each of at least certain communication orifices (A) has at least one notch (A,B) suitable for establishing a small section of communication with a distribution orifice. The invention applies in particular to hydraulic motors having radial pistons for which the ratio between the number of cylinders and the number of cam lobes is in the vicinity of