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:
Mar. 04, 1997
Filed:
Dec. 30, 1994
Gregory L Hasse, Mankato, MN (US);
Condux International, Inc., Mankato, MN (US);
Abstract
A swivel includes two heads rotatably mounted to one another with a bearing arrangement including at least two angular contact bearings arranged to receive a tension loading, and one angular contact bearing arranged in an opposite direction to receive a compression loading. The swivel is attachable, such as with a clevis, to underground drilling equipment for use in pulling a cable or conduit during a widening operation. A calcium-based grease lubricates the bearings. Periodic flushing with calcium-based grease is through a grease zerk and two single lip seals. A separate center pin for mounting the inner races of the bearings is threadably mounted to one of the heads, wherein an unthreaded portion of the shaft is positioned in a counterbore in the head.