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:
Jan. 20, 1981
Filed:
Sep. 18, 1978
Applicant:
Inventor:
George T Hardin, Knoxville, TN (US);
Assignee:
Robertshaw Controls Company, Richmond, VA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01B / ;
U.S. Cl.
CPC ...
92 48 ; 29454 ; 92 49 ; 92 97 ; 92100 ;
Abstract
A diaphragm stack for a control device and having at least two flexible diaphragms separated by a rigid spacer and a pair of rigid outboard members with the pair of outboard members being secured together by a fastening means passing through the center of the stack. The outboard members and the spacer have interlocking means disposed inboard of the inner peripheral portions of the diaphragms and serially interlocking together in the stack to prevent rotation of the spacer and the outboard members relative to each other in their assembled relation in the stack.