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Compact installation tool
| Details |
Inventors: McKay, Albert A.;
Assignee: Westinghouse Air Brake Technologies Corporation (Wilmerding, PA)
Primary Examiner: Watson; Robert C.
Assistant Examiner:
Attorney, Agent or Firm: James Ray & Associates
Hydraulic assembly tool having a tool fixed portion having a proximal end and a distal end. The tool fixed portion includes a hydraulic cylinder having a fluid pressure port at the proximal end of the tool fixed portion. The fluid pressure port is for receiving a fluid having a controllable pressure. The tool fixed portion includes a fixed jaw. The tool also has a moveable portion including a moveable jaw and a piston disposed in the hydraulic cylinder, the piston receiving a hydraulic force from the pressurized fluid. There is a compression spring engaging the tool fixed portion and the tool moveable portion, the compression spring urging the tool moveable portion including the moveable jaw in a direction opposite the direction of the hydraulic force. Increasing the pressure of the fluid causes the moveable jaw to move in the direction of the hydraulic force, and decreasing the pressure of the fluid permits the spring to move the tool moveable portion including the moveable jaw in a direction opposite the direction of the hydraulic force. |
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DETAILED DESCRIPTION I claim: 1.
A hydraulic assembly tool comprising: a tool fixed portion having a proximal end and a distal end, said tool fixed portion including a hydraulic cylinder, said hydraulic cylinder having a fluid pressure port at said proximal end of said tool fixed portion, said fluid pressure port for receiving a fluid having a controllable pressure, said tool fixed portion including a fixed jaw; a tool moveable portion including a moveable jaw and a piston disposed in said hydraulic cylinder, said piston to receive a hydraulic force from such pressurized fluid; a connecting member attaching said moveable jaw to said piston, said connecting member including male threads for engaging a threaded bore in said piston; a compression spring engaging said tool fixed portion and said tool moveable portion, said compression spring urging said tool moveable portion including said moveable jaw in a direction opposite a direction of said hydraulic force; whereby increasing such pressure of such fluid causes said moveable jaw to move in a direction of said hydraulic force, and decreasing such pressure of such fluid permits said spring to move said tool moveable portion including said moveable jaw in a direction opposite said direction of said hydraulic force.
2.
A hydraulic assembly tool, according to claim 1, wherein a fixed seat for said compression spring is disposed at said distal end of said tool.
3.
A hydraulic assembly tool, according to claim 2, wherein said fixed seat includes a central protuberance for centering said spring.
4.
A hydraulic assembly tool, according to claim 3, wherein said fixed seat is fixed to said tool by a lock ring.
5.
A hydraulic assembly tool, according to claim 1, wherein said connecting member has an internal bore enclosing a moveable seat for said spring and further enclosing at least a portion of said spring.
6.
A hydraulic assembly tool, according to claim 1, wherein said tool fixed portion further includes a distal bore at said distal end of said tool, said connecting member slidably engaging said distal bore to guide said tool moveable portion and to react moment loads on said moveable jaw
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Metal Working 
