Abstract: A rail puller that applies tension to rail sections to reduce the gap between the ends of rail sections. The rail puller comprises a first clamp assembly and a second clamp assembly located at opposite ends of the rail puller. A clamping beam is coupled to the first clamp assembly and the second clamp assembly, and has a clamping cylinder that extends and retracts to adjust the length of the clamping beam. At least two pulling members are coupled to the first clamp assembly and the second clamp assembly, and each pulling member has a pulling cylinder that extends and retracts to adjust the length of the pulling member. The clamping cylinder extends to clamp the clamp assemblies to rail sections, and the pulling cylinders retract to draw the clamp assemblies toward one another and reduce the gap between the rail sections.

Abstract: The invention provides an improved fluid motor powered lift system having a valve arrangement for reducing or interrupting the fluid flow supplied to the motor when the pressure in the lift system exceeds a predetermined pressure. A valve arrangement is provided to shut-off or throttle back the fluid supplied to the fluid motor when the fluid pressure in the lift reaches a predetermined level. When the pressure in the lift system exceeds the predetermined level, pilot pressure is supplied to an automatic shut-off valve, and this in turn reduces fluid flow to fluid air motor thereby reducing or preventing pump pressure.

Abstract: An air powered hydraulic lift system including a hydraulic pump operably connected to the ports of a hydraulic lifting cylinder, the hydraulic pump being driven by an air motor, an air pressure pilot operated valve for controlling supply of hydraulic fluid from the hydraulic pump to the ports of the hydraulic cylinder and an air pressure control valve connected to the air motor and to the air pressure pilot operated valve to supply air pressure to the air motor when air is supplied to the air pressure pilot operated valve.

Abstract: The invention provides a hydraulic toe jack including a base adapted to be supported by the ground, an elongated piston extending from the base and defining an axis, a generally cylindrical toe housing having a closed end and an open end, the toe housing defining an inner surface surrounding a portion of the piston, the toe housing being movable along the axis relative to the piston, interengaging components on the inner surface and the piston for preventing rotation of the toe housing relative to the piston about the axis, and a seal sealingly fixed to the toe housing adjacent the open end of the toe housing and slidably sealingly engaged with the piston.