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. 06, 1993
Filed:
Apr. 13, 1992
Albin J Niemiec, Sterling Heights, MI (US);
Vickers, Incorporated, Troy, MI (US);
Abstract
A rotary hydraulic machine includes a housing, a shaft carried for rotation and extending from the housing, and a shaft seal carried by the housing in sealing engagement with the shaft to prevent leakage of fluid along the shaft. The shaft seal has an annular shell adapted for mounting to the housing surrounding the shaft and radially spaced therefrom. A pair of annular resilient sealing rings are carried by the shell and extend radially inwardly therefrom into rotary sealing engagement with the shaft. A pressure relief valve includes at least one opening that extends radially through the shell between the rings, and a resilient band surrounding the shell externally of and overlying such opening. Pressure of fluid urges the band away from the shell to permit flow of fluid through the shell opening externally of the shell and band, while the band prevents entry of dirt or debris through the opening into the shell.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile