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:
Sep. 12, 1989
Filed:
Jun. 13, 1988
Applicant:
Inventors:
Daniel U Johnston, Nokomis, FL (US);
Richard A Zirnheld, Lockport, NY (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F15B / ;
U.S. Cl.
CPC ...
9137 / ; 91383 ; 91454 ;
Abstract
A vacuum operated actuator has a spring biased diaphragm that is exposed on one side to atmosphere and on the other side to a vacuum chamber. An output means is connected to move with the diaphragm and carries a valve means which together with a tube a manually controlled tube operates to connect the vacuum chamber with either atmosphere or with a vacuum source so that the diaphragm and thereby the output moves with the movement and in the direction of the tube so as to provide an output force so as to move the output with a force substantially greater than the input force applied to the tube.