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. 29, 1981
Filed:
Sep. 06, 1979
Andrew F Raab, Morton Grove, IL (US);
Raymond T Halsted, Wheeling, IL (US);
Indak Manufacturing Corp., Northbrook, IL (US);
Abstract
A combined electrical and fluid control switch is disclosed, comprising a casing, at least one operating carriage movable in the casing, and valve means in the casing and operable by the movement of the carriage. The valve means may comprise a valve wall along which a control member is movable. The valve wall is formed with at least one vacuum supply port and at least one vacuum utilization port. The control member includes a sealing member having first and second sealing dam enclosures which provide a double seal to prevent leakage between the atmosphere and the vacuum supply port as the control member is moved between a first position in which the support port and the utilization port are connected together, and a second position in which the utilization port is connected to the atmosphere. Each port preferably has a tapered portion at the intersection between the port and the valve wall.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile