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:
Aug. 10, 1999
Filed:
Jun. 13, 1997
Applicant:
Inventor:
David Edwin Yates, Evesham, GB;
Assignee:
Rolls-Royce Power Engineering PLC, Newcastle upon Tyne, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16C / ; E21C / ;
U.S. Cl.
CPC ...
299 55 ; 384110 ; 299 58 ;
Abstract
A boring machine having a cutter head rotatably mounted on a hydrostatic bearing. High pressure water is supplied to passageways between confronting bearing surfaces which react axial and radial loads and which are capable of relative rotational movement. The flow of pressurized water discharges from the passageways to prevent contamination of the bearing by the ingress of material removed by the cutter head in operation.