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:
Jun. 26, 1979
Filed:
Mar. 09, 1978
Jerry G Jelinek, LaHabra, CA (US);
Orville J Bain, Van Nuys, CA (US);
Parker-Hannifin Corporation, Cleveland, OH (US);
Abstract
A sealing device for sealing between a screw and a nut threaded thereon. The device is particularly suitable for sealing a ball type screw wherein the thread on the screw includes a helical rounded groove and wherein the thread crest is a cylindrical surface. The device is mounted in a recess of the nut and includes an annular elastomeric member having on its inside surface ribs to seal against the screw thread crests and a projection to seal the groove. The radially outer portion of the elastomeric member is generally U shaped with radially extending ribs axially spaced to provide a recess therebetween. The outer tips of the ribs seal against a cylindrical wall of the nut recess but each tip is deflectable out of contact with such wall when the fluid pressure is high on the axially outer surface of that tip to permit the high pressure fluid to enter the recess between the lips to press the other tip into tighter sealing engagement with the nut wall and to press the projection and ribs into tighter sealing engagement with the screw. The lips are backed by rigid washers to permit the deflection and tighter sealing of the lip tips and thus the device is suitable for high pressure.