Abstract: A percussion action pneumatic tool for compacting backfill areas including a vibration isolator and a percussion mechanism. The vibration isolator includes an inner shaft and an outer sleeve attached to a pair of springs. The springs dampen vibration or feedback transferred from the percussion mechanism to the outer sleeve and felt by the operator. The percussion mechanism includes a pair of elbows and an air conduit which allows the airflow to move through a second flow path into a second air space when the valve assembly directs the airflow through the second flow path.

Abstract: A trowel for finishing a material surface includes a blade assembly having a blade configured to finish the material surface and a pitch mechanism coupled to the blade and defining a first axis about which the pitch mechanism is rotatable. As the pitch mechanism rotates about the first axis, the pitch mechanism pivots the blade about the first axis. A handle is operably coupled to the blade assembly and extends along a second axis that is transverse to the first axis. The handle is rotatable about the second axis and rotation of the handle about the second axis causes rotation of the pitch mechanism about the first axis and pivoting of the blade.

Abstract: A trowel for finishing a material surface includes a blade configured to finish the material surface. A pitch angle is defined between the blade and the material surface, and a frame has a motor is coupled thereto. The motor rotates the blade about a first axis. A fork is pivotably coupled to the frame about a second axis such that pivoting of the fork about the second axis changes the pitch angle. An actuator is coupled to the frame and operable to pivot the fork. An input device is operable to control the actuator, and the input device is configured to be operated to thereby actuate the actuator and change the pitch angle of the blade.

Abstract: A percussion action pneumatic tool for compacting backfill areas including a vibration isolator and a percussion mechanism. The vibration isolator includes an inner shaft and an outer sleeve attached to a pair of springs. The springs dampen vibration or feedback transferred from the percussion mechanism to the outer sleeve and felt by the operator. The percussion mechanism includes a pair of elbows and an air conduit which allows the airflow to move through a second flow path into a second air space when the valve assembly directs the airflow through the second flow path.

Abstract: A percussion action pneumatic tool for compacting backfill areas including a vibration isolator and a percussion mechanism. The vibration isolator includes an inner shaft and an outer sleeve attached to a pair of springs. The springs dampen vibration or feedback transferred from the percussion mechanism to the outer sleeve and felt by the operator. The percussion mechanism includes a pair of elbows and an air conduit which allows the airflow to move through a second flow path into a second air space when the valve assembly directs the airflow through the second flow path.

Abstract: A handle assembly for a power tool includes a main handle having a first end configured to couple to the power tool and a handle bar having a first end coupled to the main handle. The handle bar has an isolation bushing positioned at a first vibration dampening point and configured to dampen vibrations transmitted between the main handle and the handle bar. A vibration dampening assembly couples the handle bar to the main handle at a second vibration dampening point and is configured to further dampen vibrations transmitted between the main handle and the handle bar. The vibration dampening assembly includes a collar that encircles the main handle and a pair of annular resilient member positioned between the collar and the main handle.

Abstract: A percussion action pneumatic tool for compacting backfill areas including a vibration isolator and a percussion mechanism. The vibration isolator includes an inner shaft and an outer sleeve attached to a pair of springs. The springs dampen vibration or feedback transferred from the percussion mechanism to the outer sleeve and felt by the operator. The percussion mechanism includes a pair of elbows and an air conduit which allows the airflow to move through a second flow path into a second air space when the valve assembly directs the airflow through the second flow path.

Abstract: A handle assembly for a power tool includes a main handle having a first end configured to couple to the power tool and a handle bar having a first end coupled to the main handle. The handle bar has an isolation bushing positioned at a first vibration dampening point and configured to dampen vibrations transmitted between the main handle and the handle bar. A vibration dampening assembly couples the handle bar to the main handle at a second vibration dampening point and is configured to further dampen vibrations transmitted between the main handle and the handle bar. The vibration dampening assembly includes a collar that encircles the main handle and a pair of annular resilient member positioned between the collar and the main handle.

Abstract: A percussion action pneumatic tool for compacting backfill areas including a vibration isolator and a percussion mechanism. The vibration isolator includes an inner shaft and an outer sleeve attached to a pair of springs. The springs dampen vibration or feedback transferred from the percussion mechanism to the outer sleeve and felt by the operator. The percussion mechanism includes a pair of elbows and an air conduit which allows the airflow to move through a second flow path into a second air space when the valve assembly directs the airflow through the second flow path.

Abstract: A vibratory exciter apparatus can be interchangeably connected to a variety of diverse vibratory compaction and other earth-working vibratory tools and includes a vibration-isolating connection link to tool carriers of varying sizes. A vibratory exciter housing is isolated from the connector link and from the carrying tool to which the link is attached by a primary elastomer isolator group which is, in turn, protected from damaging overload in a vertical downward direction by a secondary elastomeric isolator sheet and from damaging vertical load in an upward direction by a tertiary elastomeric isolator sheet. The connecting link utilizes adjustable bushing assemblies to accommodate dimensional differences from one boom manufacturer to another. The vibratory exciter unit includes heat-reducing shrouds for the rotary eccentric weights.

Abstract: A slide hammer for driving a probe into the ground includes a probe lifting and removal arrangement in which a slide hammer tube is pivoted away from the probe to function as a lever operating with a clutch arrangement to incrementally withdraw the probe from the ground. A biasing arrangement using a coil spring is operative to hold the anvil in a locked probe driving position, to facilitate release of the tube from the locking position for pivotal movement to the probe removal position, to bias a clutch disk to a release position with respect to the pin, to facilitate incremental lifting contact between the clutch disk and the pin, and to return the tube to a subsequent incremental lifting position.

Abstract: The compactor includes a frame which carries a soil-compacting plate and a drive mechanism, such as a gasoline engine, is mounted on the frame and has a rotatable drive shaft. A pair of eccentrically weighted shafts are mounted for rotation on the frame and the weights are in the same phase relation on the shafts. A belt drive connects the drive shaft to at least one of the eccentric shafts, and a timing belt is connected between the eccentric shafts, so that both eccentric shafts rotate in the same direction to vibrate the compactor plate and affect travel of the compactor over the terrain.

Abstract: An improved walk behind soil compactor having a double vibratory drum and an articulated frame. The compactor includes a rear drive unit having a pair of drive wheels and a forward frame is connected to the forward end of the rear drive unit by an articulated joint. The forward frame is attached through isolation mounts to a drum frame that includes a vertical support plate. A horizontal shaft is journaled with respect to the plate and a pair of drums are secured to the shaft on either side of the support plate. A power operated drive mechanism carried by the drum frame is connected through a gear drive to the shaft to drive the drums and a vibratory unit mounted on the drum frame imparts vibration to the drums. As the drums are supported solely from the central vertical support plate, the compactor is capable of compacting soil immediately adjacent to vertical walls.

Abstract: A concrete finisher of the type having driven paddles surrounded by a peripheral guard ring is made with one or more relieved guard ring sections, each preferably having a flattened outer edge, so that the finisher can be used to finish concrete surfaces adjacent to a wall or other obstruction. In some embodiments the relieved guard ring wall guide section is fixed. In other embodiments it is retractable.