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:
May. 06, 1997
Filed:
Jul. 11, 1995
Dae S Chung, Pusan, KR;
Samsung Heavy Industries Co., Ltd., Seoul, KR;
Abstract
A delivery control device for hydraulic pumps suitable for controlling the pump delivery such that the pump's delivery characteristics are not influenced by load acting on actuators is disclosed. The device also reduces the pump delivery in cases where no actuator is being operated but instantly increases the pump delivery in the event either actuator is operated. The device has a branch line branched from a pilot line and adapted for draining the swash plate's regulating pilot oil from the pilot line to a return tank, and a relief valve provided in the branch line, selectively opened in response to a preset pressure applied thereto. The preset pressure for opening the relief valve is the delivery pressure of the hydraulic pump.