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:
Jan. 10, 1995
Filed:
Oct. 26, 1993
Ichiro Ishiwata, Yokosuka, JP;
Nabco Limited, Hyogo, JP;
Abstract
This invention not only positively reduces the vibrations and noises due to pulsation pressure generated by a hydraulic pressure pump 10, but also effectively prevents the generation of foreign sounds that may occur when a liquid-operated booster 90 is abruptly activated. For this purpose, a throttle valve unit 80 (180, 280) for greatly reducing the flow area until the pressure differential or flow rate reaches a predetermined value is provided between an accumulator 70 for accumulating pressurized liquid and the liquid-operated booster 90 which utilizes the pressurized liquid as an operation source. When the pressure accumulated within the accumulator 70 is at a predetermined value or less, the throttling function of the throttle valve unit 80 (180, 280) is cancelled.