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:
Jan. 12, 2021
Filed:
Feb. 27, 2019
Vianney Rabhi, Lyons, FR;
Vianney Rabhi, Lyons, FR;
Other;
Abstract
The fluid-cushion sealing device () for a piston () moving in a cylinder () and defining with the latter a chamber to be sealed () includes: a continuous perforated ring () through the radial thickness of which passes a calibrated opening () and which is sealingly accommodated in a ring groove () provided in the piston () so as to define, with said groove (), a pressure distribution chamber () connected to a pressurized fluid source (), while an axially blind counter-pressure recess () is provided recessed on an external cylindrical ring surface () which faces the cylinder () and which the continuous perforated ring () comprises, the calibrated opening () leading into said recess ().