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:
Mar. 30, 1982
Filed:
Jan. 19, 1981
Applicant:
Inventors:
Joseph L Krechel, Ladue, MO (US);
Michael J Purvis, Fenton, MO (US);
Assignee:
Control Devices, Incorporated, St. Louis, MO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05D / ; F04B / ;
U.S. Cl.
CPC ...
137116 ; 1375147 ; 417299 ;
Abstract
An unloader/check valve for use with an air compressor comprising a one-piece valve body, a valve member slidable in the body between open and closed positions, biased toward its closed position, the valve having a bleed for unloading the compressor when the valve member is in its closed position, and a dashpot arrangement for damping pulsations of the valve member.