Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 4522269 | Dual motor torque delivering tool A pneumatic power tool for tightening screw joints includes a primary motor 11 for a high speed running down sequence, a secondary motor 12 for a high torque final tightening sequence, a coupling gearing 18 providing a high ratio gearing for the secondary... | 06/11/1985 |
| 4501176 | Automatic threaded nut installation and torquing system There is disclosed and shown an automatic nut installation and torquing system (10) connected with an automatic fastener installation machine (11) whereby a threaded nut (21) is automatically conveyed in proper orientation from a supply source to a final ... | 02/26/1985 |
| 4484871 | Torque delivering tool with dual motor drive A pneumatic power tool for tightening screw joints includes a primary motor 11 for the high speed running down sequence and a secondary motor 12 for the high torque final tightening sequence. The tool includes a coupling gearing 18 providing a high ratio ... | 11/27/1984 |
| 4480699 | Compressed-air screwdriver with shutoff bypass means The invention relates to a compressed-air screwdriver including a tool spindle, displacable against the action of a spring; an automatic shutoff having a valve for the motor, which upon attaining a predetermined torque is turned off and a device whose act... | 11/06/1984 |
| 4467877 | Power tool, in particular a hand-held compressed air screwdriver A pneumatic screwdriver or nutsetter includes a manually actuated electrical switch and a solenoid operated motive air shutoff valve which includes a spring biased reset element for moving the shutoff valve closure element from a valve closed position to ... | 08/28/1984 |
| 4459728 | Screw clamp pin extractor Screw clamp pin extractor for clamping pins of the type having a body fastened to a spreader lying between two tongs secured to a screw, and a nut acting against a spring. The extractor comprises a pneumatic motor, a nose portion engaging the clamp pin an... | 07/17/1984 |
| 4454790 | Bolt stretch measurement device An apparatus for measuring mechanical strain in a bolt, stud or other tensile member includes a measuring rod which is held in a fixed position with respect to a selected point in an axial bore in the tensile member being measured. A bolt extension tube e... | 06/19/1984 |
| 4442738 | Automatic push-to-start screwdriver An automatic, push-to-start, fluid-operated screwdriver is disclosed including a magazine providing a supply of fasteners so that only a source of fluid pressure is required for operation. A control valve is responsive to push-to-start actuation for autom... | 04/17/1984 |
| 4427077 | Portable fastening tool with manual turn on and automatic shut off A portable fastening tool of the type incorporating torque and angle sensors is connected to a data processor which analyzes the torque and angle sensings and generates a shut off signal to terminate tightening. The tool is powered and includes a fluid mo... | 01/24/1984 |
| 4418764 | Fluid impulse torque tool A fluid impulse torque tool used for tightening screws, which automatically stops when a predetermined tightening force is attained. A piston is actuated by relief oil from a relief valve attached to an oil pressure pulse generator. A shut-off valve place... | 12/06/1983 |
| 4418765 | Power-driven screwdriver with a torque control A screw tightening apparatus comprises a motor-driven screwdriver bit supported on a base for tightening a screw with a torque which is detected as a reactive force acting on the base by a torque detector. An output signal from the torque detector is ampl... | 12/06/1983 |
| 4379492 | Torque control apparatus for pneumatic impact wrench The invention relates to a control apparatus for a pneumatic impact wrench driven by an air motor. The pneumatic impact wrench according to the invention comprises a torsion bar, a spindle case, an orifice-shaped rotation suspending valve adapted to narro... | 04/12/1983 |
| 4346765 | Speed responsive motor shutoff mechanism for fluid operated tool A portable pneumatic tool includes a valve closure member interposed in the tool motor exhaust passage and engaged with a speed responsive mechanism comprising a plurality of flyweights operable to move the closure member to an open position on starting o... | 08/31/1982 |
| 4320806 | Power tool, in particular a hand-held compressed air screw driver A pneumatic screwdriver or nutsetter includes a manually actuated electrical switch and a solenoid operated motive air shutoff valve which includes a spring biased reset element for moving the shutoff valve closure element from a valve closed position to ... | 03/23/1982 |
| 4307784 | Shut-off apparatus for pneumatic driven tools The improved shut-off apparatus for pneumatically driven tools includes an auxiliary shut-off valve located in the flow passageway. The valve is controlled by a control rod which extends through the air motor into engagement with a latching device. The la... | 12/29/1981 |
| 4305472 | Apparatus for recording and limiting torque Apparatus for recording and limiting the torque applied to a pipe by a set of power tongs, wherein the tongs are operated by a hydraulic fluid pumped through a feed line to a hydraulic motor in the tongs and then returned by a return line. The apparatus i... | 12/15/1981 |
| 4280380 | Tension control of fasteners There is disclosed a technique for tightening threaded fasteners in which values of offset torque, initial tension rate relative to angle, final tension rate relative to angle and other joint related factors are empirically determined by instrumenting a p... | 07/28/1981 |
| 4267914 | Anti-kickback power tool control An impending kickback condition is the operation of a power tool or machine tool system is sensed and used to control or eliminate the kickback. The ability to sense an impending kickback condition can be used in all categories of power driven tools. The ... | 05/19/1981 |
| 4162639 | Load indicating nut wrench Method and apparatus for tightening a nut and bolt assembly to ensure that the bolt shank is tensioned correctly using a wrench having two relatively movable detector parts carried by the body of the wrench, one part being a cylindrical outer casing which... | 07/31/1979 |
| 4064771 | Automatic torque controller for an impact wrench An attachment for a pneumatic impact wrench is mounted between the wrench and socket tool which fastens a nut or bolt in an assembly. The attachment controls automatically the torque applied to the nut or bolt by providing a cylindrical housing with a sli... | 12/27/1977 |
| 3973434 | Tightening system with quality control apparatus A tightening system for tightening a fastener is disclosed herein and includes a wrench for tightening the fastener, a control system for shutting off the wrench when the fastener has been tightened to a predetermined condition and a quality control syste... | 08/10/1976 |
| 3969810 | Method for tightening a bolt to exert a predetermined tension force by monitoring bolt elongation while the bolt is being installed Method and apparatus for tightening a bolt or a machine screw to exert a predetermined tension force by monitoring bolt elongation while the bolt is being installed. The apparatus of the present invention includes a drive means adapted to engage the head ... | 07/20/1976 |
| 3965778 | Multi-stage tightening system A sequential tightening system is disclosed in this application for tightening a plurality of fasteners to a final predetermined condition and includes a plurality of wrenches for tightening the fasteners and a control system operatively associated with e... | 06/29/1976 |
