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7222680 |
Pneumatic motor improvements and pneumatic tools incorporating same
A pneumatic motor having a motor chamber having an inner surface with an eccentric longitudinal axis, a motive gas fluid inlet, and at least one end wall located transversely to the longitudinal...
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7040414 |
Pneumatic tool
A pneumatic tool includes a housing, a driving mechanism, a rear cap, a direction controller, a speed controller, and an operating member. The housing is formed with a component chamber and an...
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6725948 |
Method of regulating the feed force of a drilling device
In a method of regulating the feed force of a drilling device having a hydrostatic bore hole motor at the end of a linkage provided with a rotary and a feed drive, the feed of the linkage is set as...
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6466927 |
Method for creating a process capability database
A procedure and method for eliciting expert information on process capability and thereafter manipulating the elicited information in such a manner that it can effectively be used in a process...
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6334494 |
Control unit for hydraulic impact wrench
A pressure leading path in a impact type tool is branched halfway through a bypass passage for connecting a high pressure chamber H with a low pressure chamber (L). The branch includes a first...
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6311786 |
Process of determining torque output and controlling power impact tools using impulse
A process to more accurately determine torque output of power impact tools using impulse. Also disclosed are processes for controlling power impact tools, in particular a mechanical impact wrench,...
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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....
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6179063 |
Impulse wrench
The present invention relates to an impulse wrench for use in conjunction with a fastener engaging tool and a power supply to selectively rotate threaded fasteners. The wrench comprises a housing...
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6164393 |
Impact tool
A hydraulic impact tool for use in a well, such as an oil or gas well, comprising a movable hammer which is arranged to prestress a spring by means of a hydraulic piston (16) provided with a...
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6019180 |
Method for evaluating the power output of a drilling motor under downhole conditions
A procedure is described for determining the power output of a downhole drilling motor, when the motor is inside the wellbore. The technique uses stand-pipe pressure and fluid flow rate as the main...
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5934385 |
Tapping tool and method for driving or controlling a tapping tool with pressurized fluid
A threading attachment for internal or external threading includes a spindle head (1) which is intended to be attached to a spindle on a machine tool and also a tap holder (5) with a holder body...
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5913371 |
Apparatus for controlling the feed drive of a boring mechanism for making earth bores
In a preferably hydraulic control for a preferably hydraulically-driven earth boring mechanism, whereby a boring rod equipped with a boring tool is fed into and out of the earth with simultaneous...
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5626198 |
Pneumatic torque impulse tool
A pneumatically powered torque impulse delivering tool for screw joint tightening comprises a housing (10) with a forward impulse chamber (11) enclosing a hydraulic impulse generator (15), a motor...
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5492185 |
Impulse wrench
An impulse wrench comprises a pneumatic rotation motor (12), a hydraulic torque impulse generator (13) provided with an impulse magnitude responsive actuator (17), a linear movement responsive...
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5439063 |
Compressed-air screw or bolt tightener, especially an impulse or a torque screw or bolt tightener
A compressed-air screw or bolt tightener having a driving motor which drives a driving shaft for a screwing or tightening tool is disclosed. The motor is operated by compressed air and a control...
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5421240 |
Autoshut-off device for oil pressure type pulse wrench
This invention is intended to effect torque control of high accuracy by detecting the oil pressure at the time of the generation of a pulse which forms the basis of the generated torque for a...
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5346021 |
Fastening tool having improved pressure regulator device
An air tool for setting fasteners includes a pressure selecting valve member and internal passages for air balancing this valve member with a pressure relief pilot valve for bleeding a chamber of...
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5217079 |
Hydro-impulse screwing device
A hydro-impulse screwing device comprises a rotary drive motor, a power source for the motor, a drive shaft, a pulsating hydraulic drive connecting the motor to the shaft and a power cut-off for...
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5117919 |
Torque control system and method
An air tool torque control system includes a controller operative to independently control two air tools with continuous programmed adjustment of the torque shut off point for each tool after each...
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5113949 |
Tightening control apparatus for a torque wrench
Disclosed is a tightening control apparatus for a torque wrench including a pressure detecting device for detecting an admission pressure supplied to a torque wrench. A pressure change detecting...
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4991663 |
Shut-off valve having variable input
A shut-off valve 50 is disclosed including annular grooves 54 and a valve sleeve 26 including openings 36 which are configured and located relative to each other to define an orifice of variable...
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RE33526 |
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...
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4903783 |
Solenoid controlled air tool
A positioning device having a chamber having a chamber exhaust valve in a first end and a chamber fluid inlet in a second end; a piston disposed in a chamber between the first end and the second...
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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...
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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...
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4844176 |
Air tool with torque shut-off valve
The air tool of the present invention includes a torque shut-off valve totally enclosed within and substantially coaxial with the body housing of the tool. The torque shut-off valve includes a...
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4821815 |
Technique for providing an underground tunnel utilizing a powered boring device
A technique for providing a continuous underground tunnel between first and second spaced-apart points and for installing new cable, pipe or conduit is disclosed herein. This technique utilizes a...
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4721166 |
Automatic shut-off valve for power tools
A fluid-actuated shut-off valve for a fluid-powered tool such as a wrench including a spool valve urged to open position by a spring and having respective valve-operating surfaces subject to both...
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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...
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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,...
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4635731 |
Impulse tool
A rotary impulse device for an air motor or electric motor drive designed to produce an adjustable output torque is provided. The driven output shaft or impulse member has a cam surface driven by a...
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4534419 |
Method for pile driving and dragging
A method and apparatus for guiding a body into the ground by means of a single hammer acted on by a reaction mass which is driven by a double-acting piston-cylinder unit via a controlled,...
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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...
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4492146 |
Shut-off device for a fluid driven motor
The present invention relates to a device for shutting off a supply of pressurized motive fluid to an associated fluid driven motor in response to a predetermined motor back pressure indicating a...
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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...
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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...
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4434858 |
Air tool with stall torque regulator and air biasing mechanism
The air tool of this invention features a shut-off valve in a motor inlet passage with an air bias compartment at one end of the valve and a motor pressure compartment at an opposite end of the...
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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...
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4300641 |
Torque responsive, dual speed rotary power driver
A rotary power driver is provided which drives with a two-stage torque and speed control, wherein the initial driving is done at higher speed and lower torque, and a subsequent higher torque is...
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4278427 |
Compressed-air dental motor
A compressed-air dental motor includes a housing, a rotor, a compressed air inlet conduit supplying compressed air for placing the rotor into rotation, and a rotor shaft in the rotor connectable...
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4243111 |
Automatic shut-off valve for power tools
A fluid-actuated shut-off valve for a fluid-powered tool such as a wrench including a spool valve urged to open position by a spring and having respective valve-operating surfaces subject to both...
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4195699 |
Drilling optimization searching and control method
A searching method for optimizing the rate of penetration of a drill into a given medium based upon the two drilling parameters of thrust and speed of revolution. Preset base values of both...
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4120604 |
Portable pneumatic nut running tool having air shut-off controls
A hand held pneumatic nut running tool including an air vane rotary motor, manipulative valving for initially starting air flow to the motor and then terminating such flow, and an air flow shut-off...
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4113080 |
Torque wrench air shut-off
A power tool for setting fasteners to a predetermined torque, having a novel shut-off means that automatically shuts off the power supply at a predetermined torque, but will not "hang up" in the...
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4032252 |
Pressure gas engine
A pressure gas engine such as a compressed air turbine in which gas flow to a pressure responsive rotor is controlled by a movable valve that is operated by a bellows with means connecting each...
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4023627 |
Air shut-off tool
This invention relates to power tools and more particularly to an air-operated power tool commonly used for automotive or other assembly operations for installing threaded fasteners. The device of...
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4023626 |
Self-adaptive hydraulic rock drill
A hydraulic drill, more particularly a rock drill, having a self-adaptive servo control system comprising three separate but interdependent hydraulic circuits, one for operating and controlling the...
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4006783 |
Hydraulic operated rock drilling apparatus
A rock drilling apparatus comprises a hydraulically rotated drill, a percussion motor having a piston which transfers impact energy to the drill, the piston defining together with the machine...
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4004859 |
Air tool with speed responsive shutoff
A speed responsive shutoff for a pneumatic tool such as a nut runner is disclosed. The shutoff, effective to terminate air supply to the air motor under load, employs a centrifugally operated air...
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3976389 |
Pressurized gas engine
A pressure gas engine in which pressurized gas such as air is supplied to a series of arcuately arranged nozzles for exhausting into a series of arcuately arranged impulse buckets thereby causing...
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