61
Siefried Huber: Electric tool, particularly a handtool, with torque control. Black & Decker, Harold Weinstein, Edward D Murphy, Ronald B Sherer, December 11, 1984: US04487270 (94 worldwide citation)

A power tool has an electric motor with a motor shaft having a spiral gear through which the motor drives the tool. A pressure sensor is disposed so as to be subjected to the axial thrust of the motor shaft created by the spiral gear during operation of the tool. A torque control device is connected ...


62
William R Hamilton, Karl A Schulz: Wrench assembly for a top drive sub. Hughes Tool Company, Charles D Gunter Jr, July 26, 1988: US04759239 (93 worldwide citation)

A wrench assembly for making and breaking connections between tubular members, such as a drill string and a top drive sub. The wrench assembly consists of a lower wrench and an upper wrench. The lower wrench has a curved gate arm and a curved latch arm, pivotable between an open position and a close ...


63
Gerard Pugnet: Device for handling rods for oil-well drilling. Alsthom Atlantique, Sughrue Mion Zinn Macpeak & Seas, February 18, 1986: US04570706 (93 worldwide citation)

A device for handling rods for oil-well drilling, said device having a motor (21) associated with a reduction gear (22), the motor being suspended from a hook (8) and rotating a hollow vertical shaft (20) about its axis, said shaft being connected to a drilling sludge inlet pipe, wherein around said ...


64
Jiri Dlask, Darrall Rigby: Rotatable die holder. White Bear Energy Serives, Thomas E Malyszko, June 6, 2000: US06070500 (92 worldwide citation)

A jaw assembly is provided for a power tong or back-up tong to make up and break out a pipe section. The jaw assembly includes a jaw element for transferring torque from the tong to the pipe section, and a means for moving the jaw element into and out of gripping engagement with the pipe section. At ...


65
David A Buck: Compensating jaw assembly for power tongs. John D Jeter, December 1, 1987: US04709599 (92 worldwide citation)

A pipe die linkage for power tongs has a preloaded spring between a force producing cam follower and pipe die of such strength and preload that the die serrations will be forced to adequately bite into the pipe. Bias resisted overtravel will prevent pipe crushing at high torque levels, as the cam fo ...


66
Katsuyuki Totsu: Electrically driven screw-driver. May 15, 1984: US04448098 (92 worldwide citation)

An electrically driven screw-driver is disclosed in which a ratchet device is mounted to a portion of a chucking shaft to which a driver bit is detachably connected and the chucking shaft is connected to an output shaft of an electric motor through a planetary reduction system and in which a torque ...


67
Charles W Haynes: Dual camming action jaw assembly and power tong. Joy Manufacturing Company, Ernest E Helms, Edward L Levine, March 20, 1984: US04437363 (91 worldwide citation)

A rotary tong for use in well drilling operations to make up and break out drill strings or similar axially elongated objects which has a secondary camming action provided by the jaw assembly. By use of the inventive jaw assembly a secondary camming action is produced which reduces the cam angle of ...


68
Arden B MacNeill: Golf spike wrench and handle. Herbert L Gatewood, April 21, 1981: US04262562 (91 worldwide citation)

A handle is provided of unique shape and profile suitable for use with a variety of means requiring a handle, e.g., a golf spike wrench, a screwdriver, and a corkscrew. In the case of a golf spike wrench, a wrench is provided that can be used with either hand, and that offers maximum support for the ...


69
Damon T Slator: Jaws for power tongs and back-up units. Pravel Gambrell Hewitt Kimball & Krieger, June 6, 1989: US04836064 (90 worldwide citation)

An improvement is made to jaw designs for power tongs and back-up units. The jaw is formed having a cavity whose opening is oriented toward the pipe to be gripped. An elongated die is movably mounted in the cavity effectively closing off the cavity. The die has a gripping surface adapted to contact ...


70
Hirosuke Ooshio, Osamu Watanabe: Electrostatic chuck. Kabushiki Kaisha Tokuda Seisakusho, Schwartz Jeffery Schwaab Mack Blumenthal & Evans, February 24, 1987: US04645218 (90 worldwide citation)

An electrostatic chuck for holding a work by electrostatic forces, which has an electrostatic attraction body for attracting the work, an electrostatic conductive support body for supporting the electrostatic attraction body, channels for passing cooling medium therethrough and cover means for cover ...