Abstract: A bushing for a bracket assembly of a linkage assembly of a machine includes a cylindrical portion with an end, and a number of holes arranged on and along an axial direction of cylindrical portion, and being longitudinally spaced apart from each other. The bracket assembly includes a plate having an opening, and the cylindrical portion of the bushing is configured to be inserted into and positioned within the opening. The holes facilitate multiple positions of the end relative to the plate.

Abstract: A bushing for a bracket assembly of a linkage assembly of a machine is disclosed. The bracket assembly includes a plate having an opening. The bushing includes a cylindrical portion with an end and a number of holes arranged on and along an axial direction of cylindrical portion, and being longitudinally spaced apart from each other. The cylindrical portion is configured to be inserted and positioned into the opening. The holes facilitate multiple positions of the end relative to the plate.

Abstract: A variable damping system for a power cell of a hydraulic hammer is disclosed. The hydraulic hammer has a housing and a mounting bracket disposed on a top side of the housing. The variable damping system includes an expandable bladder that is positioned between the power cell and an underside of the mounting bracket. The expandable bladder is configured to receive a supply of pressurized fluid and maintain a pre-determined volume of pressurized fluid therein.

Abstract: A lubrication system for a tool powered by a drive fluid is provided. The lubrication system includes a reservoir configured to deliver a lubricant and a plunger disposed within the reservoir. The plunger is configured to selectively generate a pilot signal based on a level of the lubricant. The lubrication system further includes a valve having a housing. The housing includes a drive fluid inlet and a drive fluid outlet. The valve also includes a pilot spool configured to move from a neutral position to an actuated position in response to the pilot signal. The valve further includes a main spool selectively actuated by a pressure of the drive fluid to move from a first position to a second position in response to the movement of the pilot spool such that in the second position the drive fluid inlet is in fluid communication with the drive fluid outlet.

Abstract: A hydraulic hammer having a front head and a lower bushing is disclosed. Also disclosed is a system and method for easily removing the lower bushing from the front head. The front head of the hydraulic hammer may define a bore therein and an inner surface of the bore may have a first taper. The lower bushing of the hydraulic hammer may be capable of being positioned within the bore of the front head and an outer surface of the lower bushing may have a second taper, with the first taper substantially following the second taper.

Abstract: A lubrication system for a tool powered by a drive fluid is provided. The lubrication system includes a reservoir configured to deliver a lubricant and a plunger disposed within the reservoir. The plunger is configured to selectively generate a pilot signal based on a level of the lubricant. The lubrication system further includes a valve having a housing. The housing includes a drive fluid inlet and a drive fluid outlet. The valve also includes a pilot spool configured to move from a neutral position to an actuated position in response to the pilot signal. The valve further includes a main spool selectively actuated by a pressure of the drive fluid to move from a first position to a second position in response to the movement of the pilot spool such that in the second position the drive fluid inlet is in fluid communication with the drive fluid outlet.

Abstract: A hydraulic hammer having a front head and a lower bushing is disclosed. Also disclosed is a system and method for easily removing the lower bushing from the front head. The front head of the hydraulic hammer may define a bore therein and an inner surface of the bore may have a first taper. The lower bushing of the hydraulic hammer may be capable of being positioned within the bore of the front head and an outer surface of the lower bushing may have a second taper, with the first taper substantially following the second taper.

Abstract: A demolition hammer may include a housing having a distal end and a proximal end, a power cell disposed in the housing along a longitudinal axis and a side buffer positioned to support the power cell in the housing, wherein the housing forms a first retaining structure that prevents axial movement of the side buffer toward the proximal end. The housing may also form a second retaining structure that prevents inward radial movement of the side buffer and a third retaining structure that prevents outward radial movement of the side buffer.

Abstract: A tool assembly such as a hammer assembly, includes a housing defining a chamber and a reciprocating piston arranged in the chamber for cyclical movement in a work stroke and a return stroke. The housing includes a lower housing member, an upper housing member and an engaging structure which permits the engagement of the upper housing member with the lower housing member by relative rotation of the upper and lower housing members, such that each of the lower and upper housing members defines a portion of the chamber. The upper housing member is a precision component which contains the hydraulic components or other drive components necessary to drive the piston, while the lower housing member can be manufactured separately since it does not need to be manufactured to the high tolerances required by the upper housing member. The resulting tool assembly may be more compact than a conventional tie rod tool assembly.