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| Number | Title | Issue Date |
| 4462282 | Power tool with torque reaction bar The improved power tool includes a housing having a motor located in the housing and a rotatable tool drive shaft projecting from the housing. A torque reaction bar is attached to the housing and is engageable with a stationary object to prevent rotation ... | 07/31/1984 |
| 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 |
| 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 |
| 4249117 | Anti-kickback power tool control An impending kickback condition in 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 ... | 02/03/1981 |
| 4193720 | Critical torque detector A critical torque detector is disclosed made up of a rotating input member, an output member supporting a drill and connected in a "flexible driving connection" with the input rotating member, and means for detecting difference in rotational speed between... | 03/18/1980 |
| 4083270 | Air motor having angular displacement control means A power tool operated by an air motor having a rotor with radially moving vanes, and means for counting the vanes passing an electro-magnetic sensor mounted on the motor housing. A valve connected to the counter is operative to terminate rotation of the m... | 04/11/1978 |
| 4008772 | Tightening system The preferred embodiments of the invention disclosed herein relate to a tightening system comprising a wrench for rotating and applying torque to a fastener system, means for developing a signal representative of the torque being applied and means for dev... | 02/22/1977 |
| 4008773 | Tightening system The preferred embodiments of the invention disclosed herein relate to a tightening system comprising a wrench for rotating and applying torque to a fastener system, means for developing a signal representative of the torque being applied and means for dev... | 02/22/1977 |
| 3955662 | Torque limiting wrench A power tool having an adjustable torque-limiting coupling and a shut-off means, the coupling (or clutch) consisting of a driving member, a co-axial driven member and a coupling assembly comprising a tapered helical spring and means for adjusting the posi... | 05/11/1976 |
| 3948328 | Pneumatic impact wrench with torque responsive control A pneumatic impact wrench. This device is characterized in the improvement of the torque controlling mechanism incorporated therein, said mechanism comprising a torsion bar, a spindle case, a fluid element, and valves, holes and passages all functioning i... | 04/06/1976 |
