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. 12, 1990
Filed:
Mar. 24, 1988
Applicant:
Inventors:
David C Planchard, Shrewsbury, MA (US);
Robert Pandorf, Newton Highlands, MA (US);
Anthony Guerra, Scituate, MA (US);
Assignee:
Helix Technology Corporation, Waltham, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
137 12 ; 137540 ;
Abstract
The present invention discloses a relief valve containing a poppet valve which is designed to eliminate resonant chattering within the relief valve. The poppet valve contains a plurality of holes of sufficient size and number within the truncated portion of the valve to maintain a fluid pressure difference of about zero between the area within the internal cylinder of the poppet valve and the area within the valve housing about the truncated portion of the poppet cavity.