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John T. Work Patents |
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Inventor: Work; John T.
Address: Kingman, AZ
No. of patents: 3
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 5476421 |
Shock absorbing assembly |
December 19, 1995 |
| A shock absorbing assembly for a drilling machine utilizing a down hole hammer having a driver member for receiving input forces, a driven member for transmitting forces from the driver member to an attached drill string, and a resilient member which is placed under tension and elongated |
| 4186973 |
Deck-mounted shaft bushing |
February 5, 1980 |
| 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 whic |
| 4109488 |
Shock absorbing rotary drive coupling |
August 29, 1978 |
| A shock absorbing rotary drive coupling unit for drivingly connecting a tubular drive shaft to an axially aligned tubular driven shaft of a rotary blast hole drill. The unit has an annular body of resilient elastomer sandwiched between and bonded to end plates, with lugs and fasteners fo |
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