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:
Dec. 16, 1997
Filed:
Jul. 30, 1996
Applicant:
Inventors:
David R McMurtry, Wotton-Under-Edge, GB;
Jonathan S Sullivan, Wotton-Under-Edge, GB;
Assignee:
Renishaw PLC, Gloucestershire, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J / ;
U.S. Cl.
CPC ...
277 58 ; 277144 ;
Abstract
To provide a better seal for example in an indexing arm for a machine tool to prevent swarf getting to the rubber seal, an outer spring seal is provided. The seal takes the form a closely wound coil spring formed into a ring and positioned in a slightly expanded state in a vee-grove at the entrance to the space being sealed. The spring is compliant enough to allow for slight axial and transverse relative movements of the two parts of the arm and is hard enough not to be damaged by swarf or the limited relative rotation between the parts during indexing.