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:
Aug. 11, 1998
Filed:
May. 16, 1996
David Budney, Edmonton, Alberta, CA;
Other;
Abstract
A jar enhancer including a housing in which is telescopically mounted a mandrel, with the mandrel rotationally locked within the housing, and the housing and mandrel being spaced apart by an amount R at one location between them to form a chamber of width R. The upper end of the chamber is closed by a face, at least part of which is a shoulder extending inward from the housing, and the lower end of the chamber is closed by a face, at least part of which is a shoulder extending from the mandrel. The housing is sealed to the mandrel above and below the chamber and a port is provided for filling the chamber with compressible fluid. At least one of the shoulders has width W less than R, such that only a part of one of the faces bounding the chamber moves upon relative movement of the mandrel in relation to the housing. A second chamber of like design is provided in parallel with the first chamber to make a dual chamber, and in a still further jar enhancer, the dual chamber design has metallic springs rather than compressible fluid in the chambers and the shoulders need not occupy a portion of the end faces of the chamber.