Hydraulic lip seal installation driver tool

• US 8,516,671 B2
• Filed: 08/20/2009
• Issued: 08/27/2013
• Est. Priority Date: 08/20/2009
• Status: Expired due to Fees

• Current Assignee: Caterpillar Incorporated
• Original Assignee: Caterpillar Incorporated
• Inventors: Scheidenhelm, Kurt J.
• Primary Examiner(s): Wilson, Lee D
• Assistant Examiner(s): GRANT, ALVIN J
• Application Number:
  US12/544,249
• Publication Number:
  US 20110041305A1
• Time in Patent Office: 1,468 Days
• Field of Search: 292/52, 292/435.25, 297/24, 298/18, 294/264, 292/61, 292/15, 605/34, 605/72
• US Class Current: 29/252
• CPC Class Codes: B25B 27/0028 Tools for removing or installing seals B25B27/0092 takes precedence
• CPC Class Codes: Y10T 29/53522 Means to fasten by deforming
• CPC Class Codes: Y10T 29/53657 to apply or remove a resilient article [e.g., tube, sleeve, etc.]
• CPC Class Codes: Y10T 29/53748 and gas
• CPC Class Codes: Y10T 29/5383 having fluid operator
• CPC Class Codes: Y10T 29/53909 Means comprising hand manipulatable tool
• CPC Class Codes: Y10T 29/53952 Tube sleeve or ferrule applying or removing

Abstract

A hydraulic seal installation tool having an elongate body portion fixedly attached to a holding portion. The elongate body portion has a hydraulic cylinder actuation means, and a driver mechanism head portion is coupled to the elongate body portion; and an installation method for mounting a seal, involving the steps of presenting a hydraulic seal installation tool to a seal bore, where the tool has a lip seal inserted upon a driver ring of the tool. Inserting the tool into the seal bore, depressing an activation button on a handle of the tool thereby actuating a hydraulic cylinder actuation means. Expanding a plurality of engagement projection fingers, locking the plurality of engagement projection fingers in place while providing an axial alignment reaction force; overcoming a first actuation force on a spring to actuate the driver ring, by a second actuation force, pulling the seal into seal bore, dwelling for approximately five seconds to fully seat the seal, breaking the circuit to the hydraulic actuation means by releasing the activation button. Withdrawing the driver ring from the seal, retracting the engagement projection fingers and withdrawing the tool from the seal bore.

Claims

1. An hydraulic seal installation tool comprising:

an elongate body portion fixedly attached to a holding portion;

said elongate body portion having a hydraulic cylinder actuation means;

a driver mechanism head portion coupled to said elongate body portion, the head portion including;

a top piloting ring for piloting said seal;

said top piloting ring providing protection for said seal during tool insertion and positioning into a seal bore;

a driver ring, being coaxially positioned under said top piloting ring; and

a retractable finger mechanism operably connected to said top piloting ring and said driver ring, said retractable finger mechanism having a plurality of engagement projection fingers.

2. The hydraulic seal installation tool of claim 1, wherein said holding portion further includes a handle and an actuation button, said actuation button operable to activate said hydraulic cylinder actuation means.

3. The hydraulic seal installation tool of claim 2, wherein said tool has a counter balance mechanism.

4. The hydraulic seal installation tool of claim 1, wherein said engagement projection fingers are connected with a hinge-connecting link;

said link providing protection for said seal during tool removal after installation.

5. The hydraulic seal installation tool of claim 1, wherein said engagement projection fingers are retractable and rotatably attached.

6. The hydraulic seal installation tool of claim 1, wherein a leading end of said driver mechanism head portion may be chamfered to provide a guide for entry of said tool into a seal bore.

7. The hydraulic seal installation tool of claim 1, wherein said hydraulic cylinder actuation means includes a spring that reacts against said driver ring of said driver mechanism head portion causing said engagement projection fingers to rotatably expand, by a first actuation force.

8. The hydraulic seal installation tool of claim 1, wherein said plurality engagement projection fingers lock into place providing axial reaction alignment force.

9. The hydraulic seal installation tool of claim 1, wherein a second actuation force on said driver ring of said driver mechanism head portion overcomes said spring to pull said seal into said seal bore.

10. The hydraulic seal installation tool of claim 1, wherein said tool further includes a dwell cycle;

said dwell cycle providing appropriate tool dwell time to allow said seal to fully seat in said seal bore.

11. The hydraulic seal installation tool of claim 10, wherein said dwell cycle is approximately four to six seconds.

12. The hydraulic seal installation tool of claim 10, wherein said dwell cycle is approximately five seconds.

13. The hydraulic seal installation tool of claim 1, wherein said tool is self-piloting.

14. The hydraulic seal installation tool of claim 1, wherein said tool is hand-held.

15. The hydraulic seal installation tool of claim 1, wherein said handle is made of a comfort grip material.

17. An installation method for mounting a seal, comprising the steps of:

presenting said hydraulic seal installation tool of claim 1 to a seal bore;

said tool having a lip seal inserted upon a driver ring of the tool;

inserting said tool into said seal bore;

depressing an activation button on a handle of said tool thereby actuating a hydraulic cylinder actuation means;

expanding a plurality of engagement projection fingers;

locking said plurality of engagement projection fingers in place while providing an axial alignment reaction force;

overcoming a first actuation force on a spring to actuate said driver ring, by a second actuation force;

pulling said seal into said seal bore;

dwelling for approximately five seconds to fully seat said seal;

breaking the circuit to said hydraulic actuation means by releasing said activation button;

withdrawing said driver ring from said seal;

retracting said engagement projection fingers; and

withdrawing said tool from said seal bore.

18. The installation method for mounting a seal of claim 17, wherein the circuit to said hydraulic cylinder actuation means is broken by the step of:

activating a timed relay.

16. An hydraulic seal installation tool comprising:

a holding portion having a handle, an actuation button on said handle operable to activate a hydraulic cylinder actuation means, an elongate body portion relatively perpendicular to said handle, the elongate body portion housing a hydraulic actuation means;

a plurality of engagement projection fingers radially aligned along a driver mechanism head portion configured to engage a lip seal for insertion into a seal bore, said driver mechanism head portion including a top piloting ring, a driver ring, and a retractable finger mechanism.