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:
Feb. 03, 2004
Filed:
Aug. 09, 2001
Stephane Urrutia, Baurech, FR;
Dosatron International, Tresses, FR;
Abstract
A hydraulic machine comprising the following: an envelope ( ); a differential piston ( ) consisting of two parts ( ) which have a different diameter and are able to move in two corresponding chambers ( ); hydraulic switching means which are driven by the piston ( ) and can take up two stable positions in relation to the piston; control means for a rapid change in the position of the switching means including elastic means (E); and releasing means that can release the energy accumulated by the elastic means at the end of the travel and result in an abrupt change in the position of the switching means. The switching means are supported by a side-walled ( ) lantern ring ( ) that is coaxial to the piston and is driven by the piston but which can take up two different stable positions in relation to the piston and elastic means (E) are disposed inside the lantern ring ( ) and are internally guided by the side wall ( ) of said lantern ring ( ).