Abstract:
Disclosed are methods and devices utilizing magnetized components to assist operation of an internal mechanism of a tool. Magnetic fields can assist a power tool comprising internal mechanisms that cycle very quickly. Magnetized components can assist in a load/reset action relative to internal components of the power tool. In one example, one or more hammers of a hammer drill/driver can be reset more efficiently when various magnetized elements are oriented in certain ways relative to one another. Additionally, friction between components can be reduced by repulsive magnetic fields between two or more components. Utilizing the magnetic fields can improve the overall function of internal components of the tool. In another example, a tool such as a nailer or stapler can utilize magnetism to assist its internal components. In a nailer or stapler the magnetism can assist, for example, acceleration and deceleration of components utilized to drive the nail/staple.
Abstract:
A hydraulic breaker assembly including a head cap, a cylinder, and a front head, which arc mounted in a casing, wherein corresponding faces of the front head and the cylinder are connected by connecting pins, wherein the cylinder and the head cap located above the cylinder are fixed together by fastening bolts, and wherein the front head, the cylinder, and the head cap are supported on an inner side of the casing by variable dampers, which are brought into close contact with the front head, the cylinder, and the head cap. The movement in the casing is thus prevented so that the head cap, the cylinder, and the front head are strongly coupled together. The length of the fastening bolt is reduced to minimize the impact-generating section so that the bolt is protected from distortion stress occurring upon striking of the rod, thereby increasing durability.
Abstract:
The present invention, the objective of which is to provide an impact torque adjusting device of hydraulic torque wrench capable of maintaining high accuracy of the amount of impact torque generated by the impact torque generator of hydraulic torque wrench, shortening the impact torque generating period and improving durability of the impact torque generator of hydraulic torque wrench, is constructed by forming an operating fluid channel 11b communicating through the inside of the liner 7 which becomes a high-pressure chamber H and a low-pressure chamber L at the time of generation of impact torque, disposing, in the operating fluid channel 11b, a valve disc 11d urged in the direction opening the operating fluid channel 11b, and forming, behind the valve disc 11d, an oil chamber 11e communicating with the inside of the liner 7 which becomes a high-pressure chamber H at the time of generation of impact torque, so that the operating fluid channel 11b may be narrowed in proportion to the increase of the operating fluid pressure in the high-pressure chamber H.
Abstract:
A post driving implement for use with a vehicle, such as a tractor or a skid loader, is disclosed. The post driving implement is comprised of a hammer, a hammer channel, and a hammer cylinder. The hammer travels longitudinally within the hammer channel and is lifted by the hammer cylinder mounted to a closed end of the hammer channel. The hammer cylinder and its associated plumbing is of sufficient size to function as a hydraulic reservoir for the post driving implement, thus eliminating the need for a third hydraulic line to the reservoir on the vehicle and to avoiding need for alteration of the vehicle's reservoir. The post driving implement of the present invention may also include a back plate for mounting the implement to a vehicle. Additionally, the post driving implement may include adjustment mechanisms to vary the positional and angular relationship between the vehicle and the implement.
Abstract:
A pneumatic impact breaker includes a housing provided at a rear end thereof with at least one handle, a longitudinal cylinder bore formed in the housing, and a hammer piston reciprocally guided in the cylinder bore. A socket is formed in a front portion of the housing for receiving a rear impact receiving end of a working implement. An air distributing valve is located in a rear portion of the cylinder bore and arranged to direct motive pressure air alternatingly to opposite ends of the hammer piston to make the hammer piston reciprocate in the cylinder bore. And a cylinder head forms a closure for the cylinder bore as well as an axial support for the air distributing valve. The cylinder head at least partly extends into the rear portion of the cylinder bore, the housing is formed at the rear end thereof with two parallel wall portions both extending rearwardly beyond the cylinder head, and the at least one handle extends in between the two parallel wall portions. In addition, a wedge bolt is mounted between the two parallel wall portions and extends perpendicularly to the two parallel wall portions as well as to the cylinder bore to form an axial lock for the cylinder head and a mounting position for the at least one handle.
Abstract:
The invention relates to a probe assembly (1) adapted to penetrate and travel in a mass of material, comprising:a hull,a front striking zone (3) and/or a rear striking zone (4) axially opposite, for transmitting pulses to the hull,a striking piston (2) anda pneumatic motor for setting in motion the striking piston (2) so as to project it against a striking zone (3, 4) integral with the hull, a compressed-air supply for the motor, characterized by the fact that the friction of the hull and any guiding elements rigidly connected to the hull in a pulverulent mass is between a lower value f insufficient to assure the holding of the probe upon the recoil of the striking piston (2) and a higher value F preventing the probe from advancing upon the impact of the striking piston (2) on the striking zone (3, 4) so as to permit the advancement of the probe in the pulverulent material.
Abstract:
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 output shaft (20), and a hydraulic impulse clutch (19) coupling intermittently the drive unit (15) to the output shaft (20), which impulse clutch (19) comprises a drive member (18) drivingly connected to the drive unit rotor (16). A retardation responsive trip device (28) includes an inertia influenced activation member (29) which is mounted on a pivot pin (30) on the drive member (18) for movement about an axis substantially parallel to the rotation axis of the drive member (18) and which is arranged to activate a latch (40-44) by which the power controller (23) is shiftable from an open position to a closed position as a certain retardation magnitude is reached in the drive member (18).
Abstract:
A power cylinder of a hydraulic percussion implement, in whose bore a ram with an enlarged piston head is vertically reciprocable to strike a tool at the lower end of the bore, has a control chamber above the piston head alternately communicating with the high-pressure side and the low-pressure side of a source of hydraulic fluid, an annular recess in the bore being permanently or intermittently connected to high pressure acting upon the underside of the piston head. An annular drainage chamber formed by the bore at a lower level, disposed above an oil seal, collects liquid leaking down from that recess and returns it to the source. A pneumatic buffer lies in or communicates with that drainage chamber for absorbing hydraulic shocks generated when the ram strikes the tool.
Abstract:
A hydraulic percussion machine, comprising a body carrying hydraulic passages and valves, and having a gas-filled, hydraulic pressure accumulator for storing the stroke energy which accelerates a piston to strike against a tool. The percussion machine has a separate hydraulic stroke standardizing circuit by action of which the piston stroke is independent of the liquid pressure in the high pressure line supplying the machine and of the volumetric flow.
Abstract:
A vibration and noise attenuating construction for impact air tools, such as a chipper, includes axially reciprocal working and balancing members which move toward and away from each other. The end of one member defines a cylinder and cylinder chamber which receives a piston defined in the end of the other member. Pressurized air is introduced into the cylinder chamber causing the chamber to expand and the members to be translated axially from each other against the force of compression springs. Translation of the piston beyond an exhaust passage in the cylinder wall permits the chamber to exhaust whereupon the compression springs will drive the members toward their original position. The members constantly cycle in this manner to provide vibration attenuation.