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:
Oct. 30, 1990
Filed:
Aug. 03, 1989
501 Lucas Industries Public Ltd. Company, Birmingham, GB;
Abstract
An hydraulic pump and motor assembly for a vehicle hydraulic system has a housing accommodating the pump and motor, the pump having one or more spring-loaded pistons working in complementary bores to pump hydaulic fluid from a reservoir port to a delivery port, and the pistons being operated from an eccentric on a rotary output shaft of the motor through a cam bearing assembly. The assembly includes a retaining device for the pistons to limit their radially inwards movement, when the motor output shaft is removed, to an amount which is insufficient to break the hydraulic circuit containing the pistons. This enables the motor to be removed, while ensuring that the pistons are retained in their bores so that the hydraulic circuit remains intact. The cam bearing assembly may be mounted on the shaft without being retained on it, with the engagement between the pistons and the cam bearing assembly arranged so that they are all retained in the housing on withdrawal of the output shaft. Alternatively the cam bearing assembly may be withdrawn with the shaft, the pistons being retained by stop devices located in the bores.