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:
Apr. 30, 1991
Filed:
Sep. 22, 1989
Theodore C Neward, Cucamonga, CA (US);
Other;
Abstract
There is disclosed herein a small and compact vacuum pump which serves as a portable vacuum source. The pump basically includes a cylinder coupled with a handle, and a piston in the cylinder coupled with another handle, along with a suitable valving assembly for allowing a vacuum to be drawn at an inlet of the pump. More particularly, there is also disclosed a vacuum release which can be attached to or form an integral part of the pump. The vacuum release comprises a closure member which can be moved upwardly and downwardly in a housing to close and open with respect to a valve seat and, respectively, allow a vacuum to be pulled or release the vacuum. The closure member is arranged to rotate and is biased by a suitable helical torsion spring to normally maintain the closure member in the closed position to therefore normally allow a vacuum to be drawn by the pump. The vacuum release can be operated by one finger of the pump operator's hand and against the force of the spring to enable the vacuum to be simply and easily released.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile