Apparatus and method for reducing required torque

Details Apparatus and method for reducing required torque Apparatus and method for reducing required torque

2008-01-29

2008-01-29

Neuder, William P (Department: 3672)

Boring or penetrating the earth

With self-acting cyclic advance and retraction of tool or...

C166S377000

Reexamination Certificate

active

10492742

ABSTRACT:
A method of reducing the torque required to provide relative rotation of two connected members includes providing impacts at or adjacent the connection between the two members at a rate of at least two impacts per second. An apparatus for reducing the torque required to provide relative rotation of two connected members includes an impact member adapted to provide an impact to at least one of the connected members, a driver for driving the impact member, wherein the driver is operable to cause the impact member to automatically and repeatedly impact upon the at least one member.

REFERENCES:
patent: 2566999 (1951-09-01), Stone
patent: 3446284 (1969-05-01), Dyer et al.
patent: 3771389 (1973-11-01), Coyne
patent: 3980143 (1976-09-01), Swartz et al.
patent: 5138915 (1992-08-01), Doll
patent: 2001/0017067 (2001-08-01), Collins et al.

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