Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 7587964 | Pneumatic power wrench with pre-set torque levels A pneumatic power wrench comprises a housing (10) with a pressure air supply passage (16), a motor (13) and an adjustable pressure responsive shut-off valve (17) located in the air supply passage (16) and including a valve element ... | 09/15/2009 |
| 7293476 | Power sensor module for engine transmission and driveline applications A power sensor module suitable for automotive and other high volume applications is disclosed. The power sensor module combines a speed sensing and torque sensing operation into a single unit. A power measurement can be derived from torque and speed. Combining torqu... | 11/13/2007 |
| 7225961 | Air path arrangement for pneumatic nail gun An air path arrangement for a pneumatic nail gun includes cylinder received in a barrel and a handle is connected to the barrel. A space is defined between the cylinder and an inner periphery of the barrel. A connection path communicates between the interior and a f... | 06/05/2007 |
| 7156216 | Ratcheting mechanism A ratcheting mechanism for a hand-held tool is provided. The mechanism includes a housing having a central opening and a pair of slots disposed on opposite sides of the opening. Each slot has an arcuate or circular end portion opposite the central opening which circ... | 01/02/2007 |
| 7144207 | Fluid chuck device and method In a valve disposed between a fluid supply and a socket of a chuck and configured to regulate the flow of the fluid to the socket. There is a seal screw for modulating a preload tension. This seal screw has a first sealing surface. The valve further includes a secon... | 12/05/2006 |
| 7104433 | Safety apparatus of air impact driver A nose (5) of an air impact driver (1) is mounted with a slidable contact nose (12) and by the contact nose, a contact valve (23) upward therefrom is operated to switch. An AND circuit operated to pilot an air motor controlling pilot valv... | 09/12/2006 |
| 7011001 | Torque wrench A torque device includes a housing rotatably accepting an inner ring assembly having a pin eccentrically disposed relative to a torque axis. A movable member is slidably or pivotably disposed in the housing to come into and out of engagement with the pin when the in... | 03/14/2006 |
| 6948605 | Ratcheting mechanism A ratcheting mechanism for a hand-held tool is provided. The mechanism includes a housing having a central opening and a pair of slots disposed on opposite sides of the opening. Each slot has an arcuate or circular end portion opposite the central opening which circ... | 09/27/2005 |
| 6939094 | Autonomous power interface for modifying limited rotation speed of a machine The invention is directed to a secondary power tool system, components thereof and methods for using the same. It is preferably for use with an automatic tool change CNC machine having a rotating tool receiving element. The system includes a power source delivery in... | 09/06/2005 |
| 6902011 | Variable torque impact wrench Disclosed herein is a fluid control system for varying the power available to a fluid powered tool, a hydraulically driven impact wrench. The system disclosed herein varies power available to the tool by use of a bypass mechanism that is downstream of a directional ... | 06/07/2005 |
| 6382059 | Torque wrench system An improved system for installing and removing bolts or nuts from flanged joints or the like which includes a primary wrench for engaging the head of the bolt and rotating the bolt during the high-torque phase of removal or installation; a low-torque moto... | 05/07/2002 |
| 6205894 | Automatic stop device for screw striking machine An automatic stop machine for a screw striking machine includes a driver bit, an air pressure cylinder having a piston, and an air motor driving the piston and rotationally driving the driver bit. The automatic stop machine comprises an open/close valve, ... | 03/27/2001 |
| 5974919 | Screwing device for ultrasound-controlled tightening of screw connections A screwing device provided with a transmission of measuring signals has improved securing of screwing tool. Its rotary drive shaft is connected to the screwing tool in a rotationally locking manner via a polygonal coupling. The screwing tool is fastened a... | 11/02/1999 |
| 5898379 | Wireless cycle monitoring system for power tools A pneumatic tool having a radio frequency transmitting monitor as part of a system for monitoring operation of the pneumatic tool is disclosed. A pneumatic pressure valve including a sensor that generates a signal in response to sensing a predetermined co... | 04/27/1999 |
| 5671679 | Fully automatic, multiple operation rail maintenance apparatus A system for detecting targets and for positioning at least one work module over a particular target to perform a task thereon. The system includes a movable machine having a main frame, a drive mechanism for propelling the machine across a base surface, ... | 09/30/1997 |
| 5186262 | Powered tool apparatus An electro-hydraulically operated tool apparatus installs and removes bolts of track shoes for assembling and disassembling endless track assemblies. In the assembly procedure, a wrench of the tool apparatus engages the head portion of a track shoe bolt a... | 02/16/1993 |
| 5181575 | Impact wrench having torque controlling faculty An impact wrench with a torque controlling faculty including an air motor for generating a primary torque, an oil pressure pulse generating unit for converting the primary torque into a pulsatory secondary torque, a main spindle to which the pulsatory sec... | 01/26/1993 |
| 5159987 | Valve construction for automatic shut-off screwdrivers and the like A valve construction for dual valve automatic and manual shut-off screwdrivers and the like wherein construction of the valve features both valve elements in a central axial bore having a unique valve block which is held in place by a screw in a transvers... | 11/03/1992 |
| 5129465 | Screw tightening power tool A screw tightening power tool, comprising a rotation motor, a power supply (27) connected to the motor, an output shaft (13), a torque responsive release clutch (14) including a driving half (16) and a driven half (17) and coupling the motor to the output... | 07/14/1992 |
| 5082066 | Torque impulse delivering power tool A torque impulse delivering power tool having an automatic power shut-off (28) and comprises a drive unit (15) including a rotor (16), a power supply (24) connected to the drive unit (15), a power controller (23) included in the power supply (24), an outp... | 01/21/1992 |
| 5060772 | Power-operated tool The power-operated tool, preferably a screw driving implement, includes a switching clutch which transfers the torque from the drive shaft to the output shaft. Upon reaching the given reactive maximum torque, the switching mechanism is activated to turn o... | 10/29/1991 |
| 5060771 | Adjustable automatic shut-off mechanism for lever or trigger controlled air tool A rotary vane air motor tool includes an adjustable torque sensing clutch which disengages the tool bit from the air motor and simultaneously closes a normally open valve to the air motor upon reaching a threshold value. A lever or toggle actuated normall... | 10/29/1991 |
| 5005654 | High torque hydraulic shoe bolt wrench A hydraulic shoe bolt wrench used to mount and remove shoe bolts which secure shoes to a track chain. The apparatus comprises a vertical cylinder stood upright on a frame moving on a work table, a main frame secured to a piston rod of the vertical cylinde... | 04/09/1991 |
| 4941362 | Torque and angular displacement sensing in controlled wrenches The torque and angular displacement transducers in a controlled wrench apparatus are relocated to reduce the problems encountered therewith from the harsh physical environment experienced by such transducers in conventional designs. In one preferred embod... | 07/17/1990 |
| 4922436 | Method and system for the automated driving of parts and device used therein An end effector device is mounted on the arm of a robot for movement through a predetermined motion relative to control axes of the robot under control of a robot controller which also controls a driver of the device to apply at least one variable program... | 05/01/1990 |
| 4898248 | Hydraulic device Method and apparatus for tightening rotatable fastener elements including a source of pressurized fluid, a first rotatable actuator having a rotatable output shaft operable in response to fluid flow through the first actuator, first control to allow the f... | 02/06/1990 |
| 4887499 | Power screwdriver with torque limiter The instant invention relates to a power screwdriver with torque limiter, with a drive unit and a secondary transmission, with an output shaft for the attachment of a keyed bit. According to the invention the drive unit is a pneumatic motor (2) with a com... | 12/19/1989 |
| 4880064 | Torque sensing, automatic shut-off and reset clutch for screwdrivers, nutsetters and the like An improved torque control and fluid shut-off mechanism for a fluid operated tool includes a bit holder and driving clutch member which are connected for uniform cojoint axial movement and independent rotary movement. Spring biased ball bearings provides ... | 11/14/1989 |
| 4844177 | Torque sensing, automatic shut-off and reset clutch for toggle controlled screwdrivers, nutsetters and the like An improved torque control and fluid shut-off mechanism for a fluid operated tool includes a bit holder and driving clutch member which are connected for uniform cojoint axial movement and independent rotary movement. Spring biased ball bearings provides ... | 07/04/1989 |
| 4823616 | Torque and angular displacement sensing in yield threshold controlled wrenches The torque and angular displacement transducers in a yield threshold controlled wrench apparatus are relocated to reduce the problems encountered therewith from the harsh physical environment experienced by such transducers in conventional designs. In one... | 04/25/1989 |
| 4813492 | Low pressure shut off device contained within a pneumatic tool The invention provides a low pressure shut off device contained within a pneumatic tool that senses the air pressure of an air stream supplied to a pneumatic motor and shuts off the air flow when the pressure falls below a predetermined level set to maint... | 03/21/1989 |
| 4805404 | Portable pneumatic machine having embodied control electronics A portable pneumatic machine is provided including an incorporated electronic circuit for controlling and monitoring the operation, which circuit is fed with current delivered by an electric generator rotated by the driving pneumatic air, the electric gen... | 02/21/1989 |
| 4700787 | Power tong torque control Apparatus for controlling the torque delivered to pipe connections by power tongs by utilizing the reaction torque to cause a proportional fluid by-pass to be bled from the drive motor fluid power supply to slow the motor as torque increases, and to stop ... | 10/20/1987 |
| 4696206 | Torque wrench A torque wrench for making and breaking connections between sections of drill pipe. The torque wrench has upper and lower wrench assemblies, each having a gate, a latch, and a clamp. Clamping cylinders apply clamping pressure to the clamps. Torque cylinde... | 09/29/1987 |
| 4679469 | Power tongs controller with persisting torque A control system for power tongs comprises two tongs torque limiters, one of which limits tongs torque to a very low (hand-tight) level; the other limits torque at full make-up to, for example, 2000 ft.-lbs. The hand-tight torque limiter is manually or au... | 07/14/1987 |
| 4639996 | Screw fastening method An apparatus in which a threaded fastener is automatically attached to an article. The apparatus positions the threaded fastener in contact with the article and applies a torque thereon. A signal is generated indicating the torque level. The signal is com... | 02/03/1987 |
| 4631992 | Screwdriver A power drive screwdriver that is constructed to automatically stop when a predetermined torque is reached. The screwdriver includes a housing having a pneumatically driven motor therein and an output shaft that is linked to the screwdriver bit through a ... | 12/30/1986 |
| 4625597 | Screw driving apparatus A screw driving apparatus has a housing (1) for the drive system and a hollow screw guide member (2) rigidly secured to the housing (1). A screw driver blade (5) is axially displaceable in the hollow screw guide member and relative to a drive motor formin... | 12/02/1986 |
| 4579024 | Power tongs and control system A control system for power tongs comprises two tongs torque limiters, one of which limits tongs torque to a very low (hand-tight) level; the other limits torque at full makeup to, for example, 2000 ft. lb. The hand-tight torque limiter is manually or auto... | 04/01/1986 |
| 4552041 | Power tongs control system The power tongs control system described herein includes a hydraulic load transducer in the tongs snub line, the transducer output controlling a shunt valve between the hydraulic lines leading to and from the tongs drive motor. At a predetermined threshol... | 11/12/1985 |
