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. 21, 1976
Filed:
Apr. 24, 1975
Chester H Wickenberg, Elgin, IL (US);
Dahltron Corporation, Lombard, IL (US);
Abstract
A pump having a hollow cylinder, and a piston slidably received in the cylinder, with the piston dividing the inside of the cylinder into two chambers. A hollow piston rod has one end connected to the piston and the other end extending out of the cylinder, and means is provided for attaching the other end of the piston rod to an inflatable member. The pump has one-way valve means adjacent each end of the cylinder to permit passage of air into each chamber, while preventing passage of air out of the chambers. Valve means is carried by the piston to establish communication between either of the chambers and the piston rod when the pressure in either chamber exceeds the pressure in the piston rod and inflatable member. The pump has opening means communicating between the piston rod and one of the chambers, in order that the pressure in the inflatable member is indicated by the location which the cylinder assumes relative the piston after movement of the piston to the end of the one chamber and release of the cylinder.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile