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:
Jul. 25, 1978
Filed:
Jul. 01, 1977
Applicant:
Inventors:
Jon L Shafer, Houston, TX (US);
William K LeBlanc, Mansfield, OH (US);
Assignee:
Shafer Valve Company, Mansfield, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F15B / ; F15B / ;
U.S. Cl.
CPC ...
60400 ; 60402 ; 91 / ;
Abstract
A hand pump system which allows normal automatic operation of a fluid motor operator for a pipeline valve by pipeline pressure, and also provides a stand-by hand pump while may be manually connected to a pressure fluid storage in the system for operating the fluid motor operator in either direction. The hand pump is connected into the system in such manner as to prevent accidental actuation of the pump handle by a pressure surge in the pipeline.