Abstract: An impact tool which provides a consistent level of impact force is provided. The internal mechanism of the impact tool has a trip release member and a hammer which remains in constant contact over a constant surface area throughout cycling of the impact tool. Additionally, the trip release member may slide against a slug having a straight conical surface to minimize variation. Moreover, the hammer may be non-rotateable so that a non round or asymmetrical head may be used.

Abstract: An impact rapping device includes a stationary anvil integrated with a surface to be rapped, the anvil having a hammering axis perpendicular to the surface to rapped, a hammer arranged to move coaxially with the hammering axis, to hit an impact surface of the anvil, and a device for moving the hammer. The anvil and the hammer form a compact unit, which can be assembled in any position. The hammer is supported to lean on the anvil in such a way that the position of the hammer automatically follows changes of place or position of the anvil, and so that the hammer can move only parallel to the hammering axis.

Abstract: A nail gun with a rapidly attachable and detachable magazine assembly includes a nail gun, a magazine assembly and a quick joining mechanism. A handle portion of the nail gun has a quick joining pillar adapted to engage with the quick joining mechanism to attach the magazine assembly to the nail gun. By simply snap-fitting the quick joining pillar into a fixing element of the quick joining mechanism, the quick joining mechanism can naturally fix the quick joining pillar into the fixing element, and thus, the magazine assembly can be attached to the nail gun by simply a single action. Moreover, by pulling a pull rod of the quick joining mechanism and withdrawing the quick joining pillar from within the fixing element, the magazine assembly can be attached from the nail gun by also simply a single action.

Abstract: A hand-held drive-in power tool for driving-in fastening elements includes a drive-in ram (13) displaceably arranged in a guide (12), a drive (30) for driving the drive-in ram (13) and having at least one driving spring member (31) for displacing the drive-in ram (13) and formed of a fiber-reinforced plastic material, and a device (70) for preloading the driving spring member (31).

Abstract: An impact tool for simultaneously providing a rotational force and an impact force to an object has an output shaft rotated by a motor, hammer for intermittently providing an impact force to the output shaft, hammer holder for movably holding the hammer, and an impact force generator for generating the impact force from an output of the motor. An air chamber is formed between the hammer and the hammer holder such that a volume of the air chamber is variable in response to a position of the hammer relative to the hammer holder. In addition, the hammer receives a bias force generated in a direction toward the output shaft by a biasing device. This bias force effectively increases the impact force in cooperation with an air pressure caused by a volume change of the air chamber.

Abstract: An impact mechanism for use with a drive motor comprises a drive engaging member and a tool bit retaining member operatively inter-connected with the drive engaging member. The tool bit retaining member has a main body portion, and an anvil portion and a tool bit retaining portion each securely attached thereto for co-rotation therewith. A hammer is mounted on one of the drive engaging member for guided movement between an anvil contact position whereat force is transmitted from the hammer to the anvil portion so as to create a moment about the longitudinal axis, and a release position whereat the hammer is temporarily removed from the anvil portion. A spring biases the hammer to the anvil contact position. A selectively adjustable spring compression mechanism permits selective compression of the spring.

Abstract: A hand-held power tool includes a pneumatic percussion mechanism (20) having a driving member (22) reciprocating in the guide tube (21), a percussion member (23) driven by the driving member (22), and an air spring (24) located between the driving member (22) and the percussion member (23) transmits a reciprocating movement of the driving member (22) to the percussion member (23), The hand-held power tool further includes a motor-driven elongate swashplate member (29) for reciprocating the driving member (22) a displacement stroke of which is adjusted by an adjusting member (31) displaceable along a longitudinal extent of a swashplate member (29) for adjusting a swashplate angle that determines the displacement stroke of the driving member (22).

Abstract: An impact rapping device includes a stationary anvil integrated with a surface to be rapped, the anvil having a hammering axis perpendicular to the surface to rapped, a hammer arranged to move coaxially with the hammering axis, to hit an impact surface of the anvil, and a device for moving the hammer. The anvil and the hammer form a compact unit, which can be assembled in any position. The hammer is supported to lean on the anvil in such a way that the position of the hammer automatically follows changes of place or position of the anvil, and so that the hammer can move only parallel to the hammering axis.

Abstract: An exemplary embodiment of the jet hammer includes an outer sleeve, impact assembly, and a valve assembly. The impact assembly is positioned in sliding relation to the outer sleeve to provide the impact of the jet hammer. The valve assembly generally comprises a cap screw, adjustment sleeve, valve port, inner compression spring, outer compression spring, and lock nut. The inner compression spring is relatively less compressible than the outer compression spring. In operation, fluid enters the valve assembly and acts on the compression springs forming an operational seal between the valve assembly and the impact assembly. In response, the outer sleeve is slidingly displaced from the impact assembly thereby compressing a main compression spring positioned along the mandrel shaft. Once the pressure acting on the valve assembly is released, the main compression spring decompresses forcefully causing the outer sleeve to impact a connection port, bit, tool, or other member attached to the upper end of the mandrel.

Abstract: A hand-held power tool includes a pneumatic percussion mechanism (20) having a driving member (22) reciprocating in the guide tube (21), a percussion member (23) driven by the driving member (22), and an air spring (24) located between the driving member (22) and the percussion member (23) for transmitting a reciprocating movement of the driving member (22) to the percussion member (23), and a motor-driven elongate swashplate member (29) for reciprocating the driving member (22) a displacement stroke of which is adjusted by an adjusting member (31) displaceable along a longitudinal extent of a swashplate member (29) for steplessly adjusting a swashplate angle that determines the displacement stroke of the driving member (22).

Abstract: An impact jar including a biasable member, an impactor and an impactee slidably coupled to the impactor. The impactor includes a first down-hole tool connector. The impactee includes a second down-hole tool connector distal from the first down-hole tool connector and a plurality of flexible coupling fingers. The biasable member is detachably engaged by the plurality of flexible coupling fingers in a pre-impact position and is configured to disengage the plurality of flexible coupling fingers in response to a tensile force applied across the first and second down-hole tool connectors reaching a predetermined quantity. The impactor and the impactee are configured to impact in response to the disengagement of the biasable member and the plurality of flexible coupling fingers. In one embodiment, the impact jar may be employed in either of e-line and slickline applications.

Abstract: Substantially cylindrical head tube body, center tube body and tip tube body threadedly engage each other to thereby construct a tool main body of a tool for wristwatch. The through hole of the center tube body is provided with a partition part having a small-diameter hole and slant face. A hammering member and compression spring are slidably accommodated in the through hole. A trigger shaft includes a small-diameter part which can be inserted in a center hole of the hammering member, and a large-diameter part continuing therefrom through the slant face, which can pass through the small-diameter hole. A deformed coil spring has the large-diameter part of the trigger shaft fitted therein in wound form, and energizes the trigger shaft toward sliding shaft while slanting the trigger shaft so as to cause the small-diameter part to shift toward the inside wall of the tool main body.

Abstract: An impact jar including a biasable member, an impactor and an impactee slidably coupled to the impactor. The impactor includes a first down-hole tool connector. The impactee includes a second down-hole tool connector distal from the first down-hole tool connector and a plurality of flexible coupling fingers. The biasable member is detachably engaged by the plurality of flexible coupling fingers in a pre-impact position and is configured to disengage the plurality of flexible coupling fingers in response to a tensile force applied across the first and second down-hole tool connectors reaching a predetermined quantity. The impactor and the impactee are configured to impact in response to the disengagement of the biasable member and the plurality of flexible coupling fingers. In one embodiment, the impact jar may be employed in either of e-line and slickline applications.

Abstract: A miniature impact tool in which a cam and cam follower assembly is utilized for moving a striker backward by converting rotary motion of a drive shaft to a linear motion. The striker is in contact with a spring/guide pin (plunger) assembly and is moved away from a surface to be struck during a portion of the rotation cycle of the cam. On further rotation the cam surface is cut away and spring action drives the striker forward, causing impact of a cutting tool (chisel) against a workpiece. A plurality of cam lobe surfaces provides predetermined and reproducible impact forces of the cutting tool on the workpiece, even during vibration of the tool. To minimize damage to the cam and cam follower when the tool is over speeded, an elastomeric cam or a cushioning coating or sleeve prevents adverse contact (such as metal-to-metal contact) between the cam and cam follower.

Abstract: An improvement to a delimber system having a delimbing unit including cutting elements, for cutting limbs extending from a tree trunk, and a tree trunk loader mechanism, for pulling the tree trunk of a tree to be delimbed through the delimbing unit such that the limbs extending from the tree trunk are severed from the tree trunk by the cutting elements. The improvement includes adding a base frame; a slide carriage mounted between the base frame and the delimbing unit such that the delimbing unit is slidable with respect to the base frame between a forward delimber position toward the tree trunk loader mechanism and a rearward delimber position away from the tree trunk loader mechanism; and an impact assembly mounted functionally between the base frame and the delimbing unit, the impact assembly including a force generating mechanism for generating a force transmitted between the base frame and the delimber unit to force the delimber unit into the rearward delimber position.

Abstract: A miniature impact tool in which a cam is utilized for moving a striker backward by converting rotary motion of a drive shaft to a linear motion. The striker is in contact with a spring/guide pin (plunger) assembly and is moved away from a surface to be struck during a portion of the rotation cycle of the cam. On further rotation the cam surface is cut away and spring action drives the striker forward, causing impact of a cutting tool (chisel) against a workpiece. An improved mechanism utilizing a plurality of cam lobe surfaces provides predetermined and reproducible impact forces on the cutting tool. This mechanism is not adversely affected by vibration of the tool.

Abstract: A miniature impact tool in which a cam is utilized for moving a striker backward by converting rotary motion of a drive shaft to a linear motion. The striker is in contact with a spring/plunger assembly and is moved away from a surface to be struck during a portion of the rotation cycle of the cam. On further rotation the cam surface is cut away and spring action drives the striker forward, causing impact of a cutting tool (chisel) against a workpiece. Excessive wear of the drive shaft is eliminated using a specific design of a shelf upon which the striker moves, as well as a sleeve bearing around the drive shaft in the area of possible wear. The striker is provided with a guide structure (such as a recess) into which the nose of the plunger fits in order to provide controlled guidance of the striker in its longitudinal movement. The output shaft of the tool accepts removable collets of varying shapes in order to accommodate chisel tools having different shank geometries and sizes.

Abstract: In accordance with an illustrative embodiment of the present invention, a steel post driving machine that is mounted on the lift mechanism of a tractor includes a mast having a tubular hammer slidably guided thereon, springs to accelerate the hammer downward, a cable to lift the hammer and lengthen the springs to store potential energy therein, and a mechanism coupled to the cable and powered by the PTO of the tractor for intermittently pulling on and then releasing the cable to cause the hammer to strike repeated impact blows on the top of the steel post. Upper and lower devices are included to maintain the mast in alignment with the post as the lift mechanism is being lowered and the post is being driven into the ground by the hammer.

Abstract: A tool 10 for creating a standard repeatable impact on a nuclear steam supply system (NSSS) structure to determine the response of an accelerometer to the impact of a known energy at a predetermined location on the structure. The tool 10 includes a barrel 12 and a spring 30 which biases a ram 20 reciprocally mounted in the barrel and driven by cam plates 66 and 68 on shaft 60. A flange 28 on ram 20 compresses spring 30 and upon movement of follower 72 to a maximum radial distance from shaft 60, the follower 72 drops down step 70 on the cam surface to allow spring 30 to uncompress and project ram 20 out of the barrel such that end 22 of the ram creates a standard impact on the NSSS structure. A hand crank drives shaft 60. A dampening spring 78 assists in the rebound of the ram 20.

Abstract: A spring-loaded, impact-type chiropractic device especially useful for repositioning a cervical vertebra in the spinal column of a patient. The device includes a tubular casing having an anvil structure at one end and a spring-biased hammer mounted in the tubing. An elongated spindle is connected to the hammer for drawing the hammer away from the anvil into a loaded position in which the spring is compressed. A releasable detent mechanism is provided which holds the hammer in the loaded position or, when released, allows the hammer to strike the anvil. Preferably, the casing includes two telescopically-interfitted tubular portions and one or more hammer-biasing springs; adjustment of the tubular portions relative to each other determines the amount of compression of the springs with the hammer in the loaded position.

Abstract: A percussion instrument suitable for use in dental practice for determining the degree of looseness of a tooth has a ram displacably seated in the handpiece and a means for accelerating the ram from an initial position to a defined velocity, the ram subsequently moving toward a test object in free flight with a constant velocity. The ram is returned to its initial position with the assistance of a magnetic field. The ram is in the form of an elongated oscillating lever having a pivot axis located at its center of gravity, the axis being disposed at a right angle relative to a longitudinal axis of the instrument. The ram has a test head at one end thereof which is disposed at an angle, such as a right angle, with respect to the lever portion of the ram.

Abstract: A hand held termination tool which is used in conjunction with a termination blade for connecting conductor wires to terminals on a termination block has a handle within which is disposed a hammer assembly. A slide assembly is mounted in the handle yieldably urged to a position extending from one end thereof and disposed to receive an impact blow from the hammer assembly when forced inwardly from the extended position a predetermined distance. The hammer assembly includes a drive spring providing the force for the impact. A drive spring seat member supports one end of the drive spring and is movable between an extended and a retracted position, thereby providing a short compressed drive spring length in the extended position and a longer compressed drive spring length in the retracted position. A cam adjustable to either one of two positions selects either the short or longer compressed lengths for the drive spring and thereby a high or a low impact force respectively.

Abstract: In a hand-operated label printing machine, including a hand lever and a printing head attached to the hand lever; a printing pressure buffer mechanism or a constant pressure printing mechanism which comprises: in a first embodiment, a spring-actuated engaging member formed in the hand lever and a cooperating checking shoulder which is formed in the main body of the machine; an inclined groove leads to the shoulder; the shoulder is brought into disengageable engagement with the spring-actuated engaging member for moderating the printing pressure; and when the spring-actuated engaging member rides over the checking shoulder, the printing head is actuated; in a second embodiment, a pressure receiving engaging member is carried on the hand lever, through a lost motion connection; a pressure contact member and a guide member are both carried on the main body of the machine and are spaced apart; the pressure receiving engaging member is integrally provided with a pressure receiving piece having a cam surface at the

Abstract: An impact device for use in machines, such as presses, for marking, punching, stamping, forming, riveting, and other related operations, wherein a convex edged member, such as a ball, axially separates a tool and a hammer, the hammer being loaded by compressible means such as a tension spring, all moveable axially within a moveable spindle. The ball is displaced radially into an adjoining magazine at the point of full extension of the spindle, after the tool is in contact with the workpiece, thereby allowing the spring loaded hammer to strike the tool, imparting an impact force to the workpiece.

Abstract: An impact extraction tool is disclosed for driving contacts from housings, circuit boards, and the like. The tool is adapted to extract contacts of substantially any post length and even contacts having posts lying under flush with respect to the supporting surface. The tool has a floating cocking spring and thus is shorter than similar tools.

Abstract: A miniature impact tool utilizes a cam for driving a striker forward by converting a rotary motion to a linear motion. The striker is spring loaded and is moved away from a surface to be struck during a portion of the rotation cycle of the cam. On further rotation the cam surface is cut away and spring action drives the striker forward causing impact. The above action is then repeated. The tool is adapted to be provided with variable drive speed and torque.

Abstract: A terminal block installation tool which comprises a housing having a driving and cutting bit actuated by a piston ram which can be either manually actuated mechanically or pneumatically actuated by fluid pressure.

Abstract: A fastener driving tool includes a housing assembly with a nosepiece assembly defining a drive track. A driving mechanism is housed within the housing assembly to drive a fastener through the drive track and into a workpiece in response to a trigger. The tool includes a safety trip assembly which includes a trigger enabling portion and a workpiece engaging portion and is movable between an extended disabling position and a retracted enabling position. The safety trip assembly is biased toward the extended position and is moved toward the retracted position by engagement between the workpiece and the workpiece engaging member. The workpiece engaging portion is movable to permit adjustment of a length of the safety trip assembly. The safety trip assembly includes a coupling mechanism including a fixed locking structure formed on an exterior portion of the workpiece engaging portion and a manually operable locking mechanism.