Deck-mounted shaft bushing

Details Deck-mounted shaft bushing Deck-mounted shaft bushing

1978-07-25

1980-02-05

Butler, Douglas C.

Cutlery

175220, 308 4A, 308238, F16C 2100

Patent

active

041869737

ABSTRACT:
A guide bushing mountable in a supporting sleeve in the deck of a blast hole drill for guiding a drill string extending through the sleeve, the bushing having a tubular core providing a cylindrical axial bore adapted to receive and guide the drill string, the core having a flange by which it is supported in the supporting sleeve, and in which a resilient, elastomeric cushion mounted on the exterior of the core serves to cushion transverse movements of the bushing within the supporting sleeve. Preferably, the bushing is formed of two halves fastened together by hinges, so that it can be opened and laterally installed around the drill string.

REFERENCES:
patent: 2259460 (1941-10-01), Dexter
patent: 2897016 (1959-07-01), Baker
patent: 3951470 (1976-04-01), McLean

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