Rotary kinetic fluid motors or pumps – With control means responsive to non-cyclic condition... – By shaft speed or torque responsive means
Reexamination Certificate
2005-02-15
2005-02-15
Look, Edward K. (Department: 3745)
Rotary kinetic fluid motors or pumps
With control means responsive to non-cyclic condition...
By shaft speed or torque responsive means
C175S107000
Reexamination Certificate
active
06854953
ABSTRACT:
The present invention provides a speed governor (5) suitable for use in a fluid driven down-hole tool (3). The speed governor comprises an actuator (7) operatively coupled to a motive fluid flow control valve (6). The actuator is and arranged so as to be activatable, directly or indirectly, in response to the running speed of the tool (3), for opening of the control valve (6) with increasing rotational speed of the motor (3) above a predetermined speed limit thereby to limit the rotational speed of the downhole tool (3).
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patent: 2963099 (1960-12-01), Gianelloni, Jr.
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patent: 4768598 (1988-09-01), Reinhardt
patent: 4776752 (1988-10-01), Davis
patent: 0 305 511 (1988-09-01), None
patent: 755207 (1956-08-01), None
Harris Gary L.
Neilson Richard D.
Stewart Donald
Stewart Kenneth Roderick
Van Drentham-Susman Hector F. A.
Casperson John R.
Edgar Richard A.
Look Edward K.
Rotech Holdings Limited
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