Assemblies to cut a hollow piling are provided, which may have a pressurized hydraulic fluid supply configured to supply enough force to cut through up to the circumference of a piling having a housing having a cavity to receive the hydraulic fluid, the housing having at least one cylinder wall; at least one piston assembly slidably disposed within the at least one cylinder wall configured to extend from the at least one cylinder wall in response to the introduction of pressurized hydraulic fluid into the housing cavity; and a blade attached at a radially distal end of the piston assembly, whereby as the blade extends through the cylinder wall, a cutting force is applied to an encountered piling wall.

A pneumatic linear actuator with a manually adjustable stop mechanism integrated into the device such that the actuator mechanism and the stop mechanism are co-linear. The stop mechanism limits the travel of the actuator by turning a handwheel. The mechanisms are completely sealed and/or enclosed and a gear-reduction position indicator is included. Forward and reverse acting variations are presented.

A pneumatic linear actuator with a manually adjustable stop mechanism integrated into the device such that the actuator mechanism and the stop mechanism are co-linear. The stop mechanism limits the travel of the actuator by turning a handwheel. The mechanisms are completely sealed and/or enclosed and a gear-reduction position indicator is included. Forward and reverse acting variations are presented.

An actuator assembly includes a cylinder disposed in an actuator housing, the cylinder having a cylinder interior is in fluid communication with a source of pressurized fluid. A ram member has a piston head within the cylinder interior, and pressure on the piston head moves the ram member. An end of the ram member acts on a collar having a collar interior, and an end of a rod member is disposed within the collar interior. The rod member is displaceable relative to the collar such that the end of the rod member does not contact the collar. Accordingly, fluid in the cylinder interior acting on the ram member may expand due to thermal expansion without damaging a hard stop at an opposite end of the rod member and without losing system pressure by triggering a relief valve.

An actuator assembly includes a cylinder disposed in an actuator housing, the cylinder having a cylinder interior is in fluid communication with a source of pressurized fluid. A ram member has a piston head within the cylinder interior, and pressure on the piston head moves the ram member. An end of the ram member acts on a collar having a collar interior, and an end of a rod member is disposed within the collar interior. The rod member is displaceable relative to the collar such that the end of the rod member does not contact the collar. Accordingly, fluid in the cylinder interior acting on the ram member may expand due to thermal expansion without damaging a hard stop at an opposite end of the rod member and without losing system pressure by triggering a relief valve.

A cylinder vice includes a vice jaw, a chain retainer, and a hydraulic assembly. The vice jaw is positioned between side braces and include outer and inner plates. The outer plates include a top edge having a V-shape geometry. The outer plates include a female slide configured to interface with a male slide of the side braces. The inner plates include a top edge having another V-shape geometry. The inner plates include a bottom edge that is configured to interface with a piston. The chain retainer configured to retain a chain end positioned in a slot configuration of the chain retainer and fastened via retainer handles. The chain retainer includes a handle on each side of the slot configuration such that each handle is positioned in the notches of the side braces. The hydraulic assembly is configured to actuate the piston against the bottom edge of the inner plates.

A cylinder vice includes a vice jaw, a chain retainer, and a hydraulic assembly. The vice jaw is positioned between side braces and include outer and inner plates. The outer plates include a top edge having a V-shape geometry. The outer plates include a female slide configured to interface with a male slide of the side braces. The inner plates include a top edge having another V-shape geometry. The inner plates include a bottom edge that is configured to interface with a piston. The chain retainer configured to retain a chain end positioned in a slot configuration of the chain retainer and fastened via retainer handles. The chain retainer includes a handle on each side of the slot configuration such that each handle is positioned in the notches of the side braces. The hydraulic assembly is configured to actuate the piston against the bottom edge of the inner plates.

An actuator includes a housing defining an inlet port, a piston and a return spring disposed within the housing, and an elastically deformable element. The return spring is configured to apply a biasing force to the piston to move the piston to a spring return position. A first fluid pressure applied to the inlet port moves the piston against the biasing force of the return spring to a first actuated position in which the piston indirectly engages a stop portion of the actuator housing. A second fluid pressure, greater than the first fluid pressure, applied to the inlet port moves the piston against the elastically deformable element to compress the elastically deformable element to move the piston to a second actuated position beyond the first actuated position.

Various implementations include an actuator. The actuator includes a housing and a piston. The housing has a central axis and an inner surface. The housing defines at least one protrusion that extends radially inwardly from the inner surface of the housing. The piston is slidingly disposed within the housing and engages the inner surface of the housing as the piston travels a stroke length within the housing along the central axis. The piston travels from a proximal end to a distal end of the stroke length upon actuation of the actuator. The protrusion is disposed adjacent a distal end of the stroke length and is deformed in a radially outward direction when the piston engages the protrusion.

A spoiler actuator can be operated by applying high pressure to a first chamber of the actuator on receipt of a command to extend the spoiler; applying high pressure to a second chamber of the actuator on receipt of a command to retract the spoiler; and on failure of a supply of the high pressure actuating an anti-extension valve to prevent extension of the spoiler; disengaging the anti-extension valve to permit extension if pressure applied to the anti-extension valve exceeds a predetermined force of a spring biasing the anti-extension valve to the engaged position, wherein additional force is applied to the anti-extension valve if the spoiler is retracted beyond a neutral position.