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. 24, 1986
Filed:
May. 20, 1985
Jefferson Y Yang, Orange, CA (US);
Consolidated Controls Corporation, El Segundo, CA (US);
Abstract
A bidirectional relief valve is provided which has a slidable valve element provided with first and second groups of ports which are positioned on opposite sides of a fixed port in the valve body when the slidable valve element is in a neutral position. The valve element may be moved in either direction from the neutral position in response to the differential pressure across the damping head under selected conditions of preload which may be different in each direction. The movable valve element includes a stem portion of relatively small diameter and a larger diameter head portion in which the first and second ports are located. In order to prevent an excessive pressure build up, or overshoot, in response to a shock wave of large magnitude in either direction, the movable valve element is given an initial acceleration by employing the relatively large area of the valve head. However, as soon as the valve element has been initially accelerated the area which is effective to move the valve element is reduced to the area of the stem. With this arrangement, the pressure can be brought to the desired steady state value without causing an undesired initial pressure overshoot.