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. 20, 1990
Filed:
Sep. 05, 1989
Applicant:
Inventor:
Stephen M Heiman, Exton, PA (US);
Assignee:
Microdot Inc., Chicago, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
251284 ; 251295 ; 251904 ;
Abstract
A vacuum dump valve comprises a housing having a cylindrical cavity therein communicating with ambient pressure and with a vacuum line, and a plunger in said cavity having a pair of diametrically spaced tabs acceptable in a pair of slots in said housing to limit travel and guide the plunger relative to the housing.