Installation tool system for Hi-Lok-type fasteners

• US 5,305,666 A
• Filed: 03/23/1992
• Issued: 04/26/1994
• Est. Priority Date: 03/28/1990
• Status: Expired due to Term

• Current Assignee: Joseph S. Latorre
• Original Assignee: Joseph S. Latorre
• Inventors: LaTorre, Joseph S.
• Primary Examiner(s): Smith, James G.
• Application Number:
  US07/856,839
• Time in Patent Office: 764 Days
• Field of Search: 81/55, 81/56
• US Class Current: 81/55
• CPC Class Codes: B25B 13/463 a pawl engaging an externally toothed wheel
• CPC Class Codes: B25B 21/002 for special purposes
• CPC Class Codes: B25B 21/004 of the ratchet type
• CPC Class Codes: B25B 23/1415 Break members; Arrangements specially adapted for break-bolts break-bolts per se F16B31/00

Abstract

The invention is a tool for installing Hi-Lok-type fasteners consisting of a pin component having a headed end and a threaded end with a hex recess therein, and a collar component having a threaded body and a torque-off nut. The tool has a drive head in which a rotatably driven socket is supported for driving the collar component of the fastener during a fastener installation event. A tubular key holder is coaxial with the socket and rotationally fixed relative to the drive head, supporting a hex key against rotation in an axial keyway, the hex key being engageable in the pin component hex recess to hold the pin component against rotation during a fastener installation event. A retention shaft extends coaxially through the key holder, and its forward end is threadedly connected to the key to retain the key in the holder. The key is forwardly threadedly removable from the holder keyway by rotating the retention shaft in one direction relative to the holder, and another key is threadedly replaceable in the holder keyway by rotating the retention shaft in the other direction relative to the holder. Tooling inventory is minimized by the ability to utilize only a single size key for all socket lengths and drive hex recess sizes, and by the ability to utilize only eight holder sizes to accommodate the conventional eight socket lengths, for all socket hex recess sizes.

Claims

1. A tool for installing a threaded fastener of the Hi-Lok type, comprising a pin component having a headed end and a threaded end with a hex recess therein, and a collar component having a threaded body and a torque-off nut, which comprises:

body means comprising rotary motivating means;

drive head assembly means generally fixedly supported on said body means and having rotary power receiving means therein operatively connected to said motivating means for rotation of said receiving means;

tubular socket means having forward and rearward portions and having a cylindrical through bore, said rearward portion being rotatably supported by said drive head means and operatively connected to said power receiving means for rotation of said socket means during a fastener installation event, and said forward portion having a forwardly opening hex drive socket recess therein that is operatively engageable with said torque-off nut;

hex key means having a rearward body coaxial of said socket means bore and a forward hex wrenching shaft extending forwardly of said socket means, said wrenching shaft being receivable in said pin component hex recess for holding said pin component against rotation during a fastener installation event, said key body having a rearward external hex surface and a rearwardly opening threaded bore;

tubular key holder means coaxial with but rotationally independent of said socket means, at least a forward portion of said holder means being located within said socket means bore, said holder means having a forwardly opening internal hex engageable over said key body hex to rotationally lock said key means and said holder means together;

retention means extending coaxially through said holder means but rotationally independent of said holder means, said retention means having an externally threaded forward end portion that is threadedly engageable in said threaded bore of said key means, and having limit means thereon which is interengageable with said holder means to limit forward location of said retention means in said holder means;

said retention means being biased forwardly toward a forwardmost position of repose in said socket means, and said retention means and key means being rearwardly retractable relative to said socket means against the biasing force of said spring means during a fastener installation event as said socket means moves forwardly relative to said key means; and

antirotation means connected to said drive head assembly means and operatively associated with said holder means for holding said holder means fixed against rotation relative to said assembly means;

said key means being forwardly threadedly removable from said holder means by rotating said retention means in one direction relative to said holder means, and another said key means being threadedly replaceable in said holder means by rotating said retention means in the other direction relative to said holder means.

2. A tool as defined in claim 1, wherein said retention means comprises spring means operatively associated with said retention means to bias said retention means forwardly toward a forwardmost position of repose in said socket means, said retention means and key means being rearwardly retractable relative to said socket means against the biasing force of said spring means during a fastener installation event as said socket means moves forwardly relative to said key means.

3. A tool as defined in claim 2, wherein said spring means comprises wire spring means mounted on said drive head assembly means and operatively engaged with said holder means.

4. A tool as defined in claim 3, which comprises slot means in said holder means, and said antirotation means comprises engagement of a portion of said spring means in said slot means.

5. A tool as defined in claim 1, wherein said drive head assembly means is elongated, extending from generally proximate said body means to a free end portion remote from said body means;

said socket means and holder means being supported generally proximate said free end portion.

6. A tool as defined in claim 4, wherein said drive head assembly means is elongated, extending from generally proximate said body means to a free end portion remote from said body means;

said socket means and holder means being supported generally proximate said free end portion;

said spring means having a base end portion attached to said drive head assembly means generally toward said body means and an elongated body portion extending from said base end portion longitudinally along the length of said drive head assembly means to a free end portion that is engaged in said slot means.

7. A tool as defined in claim 1, which comprises stop means interengageable between said holder means and said socket means to limit forward travel of said holder means relative to said socket means.

8. A tool as defined in claim 7, wherein said stop means comprises head means on the rearward end of said holder means and engageable against the rearward end of said socket means.

9. A tool as defined in claim 4, which comprises head means on the rearward end of said holder means and engageable against the rearward end of said socket means to limit forward travel of said holder means relative to said socket means;

said slot means being located in said holder means head.

10. A tool as defined in claim 6, which comprises head means on the rearward end of said holder means and engageable against the rearward end of said socket means to limit forward travel of said holder means relative to said socket means;

said slot means being located in said holder means head and being oriented generally transverse to the length of said drive head assembly means;

said free end portion of said spring means comprising a transverse cross-head portion of said spring means that is engaged in said slot means.

11. A tool as defined in claim 1, which comprises head means on said retention means exposed rearwardly of said drive head assembly means for manual rotation of said retention means to remove one said key means and replace it with another said key means.

12. A tool as defined in claim 11, wherein said retention head means is peripherally knurled to facilitate manual manipulation.

13. A tool as defined in claim 2, which comprises head means on said retention means exposed rearwardly of said drive head assembly means for manual rotation of said retention means to remove one said key means and replace it with another said key means.

14. A tool as defined in claim 8, wherein said limit means on said retention means comprises head means on said retention means exposed rearwardly of said drive head assembly means for manual rotation of said retention means to remove one of said key means and replace it with another said key means;

said retention head means overlying and axially engaging said holder head means.

15. A tool as defined in claim 9, wherein said limit means on said retention means comprises head means on said retention means exposed rearwardly of said drive head assembly means for manual rotation of said retention means to remove one of said key means and replace it with another said key means;

said retention shaft head means overlying and axially engaging said holder head means.

16. A tool as defined in claim 10, wherein said limit means on said retention shaft means comprises head means on said retention shaft means exposed rearwardly of said drive head assembly means for manual rotation of said retention shaft means to remove one of said key means and replace it with another said key means;

said retention shaft head means overlying and axially engaging said holder head means.

17. A tool as defined in claim 15, wherein said retention means has annular groove means therein which axially registers with said slot means in said holder means;

said portion of said spring means that is engaged in said slot means also being engaged in said annular groove means for axially locating said retention means against rearward movement relative to said holder means.

18. A tool as defined in claim 16, wherein said retention means has annular groove means therein which axially registers with said slot means in said holder means;

said transverse cross-head portion of said spring means that is in engagement with said slot means also being engaged in said annular groove means for axially locating said retention means against rearward movement relative to said holder means.

19. A tool as defined in claim 1, which comprises a 20°

ratchet head tool, and wherein said power receiving means comprises ratchet gear means.

20. A tool as defined in claim 1, which comprises a straight ratchet head tool, and wherein said power receiving means comprises ratchet gear means.

21. A tool as defined in claim 1, which comprises a flush ratchet head tool, wherein said power receiving means comprises ratchet gear means, and said socket means is embodied in said ratchet gear means.

22. A tool as defined in claim 1, which comprises a geared L-head tool, and wherein said power receiving means comprises spur gear means.

23. A tool as defined in claim 22, wherein said socket means is embodied in said spur gear means.

24. A tool as defined in claim 2, which comprises a 20°

ratchet head tool, and wherein said power receiving means comprises ratchet gear means.

25. A tool as defined in claim 2, which comprises a straight ratchet head tool, and wherein said power receiving means comprises ratchet gear means.

26. A tool as defined in claim 2, which comprises a flush ratchet head tool, wherein said power receiving means comprises ratchet gear means, and said socket means is embodied in said ratchet gear means.

27. A tool as defined in claim 2, which comprises a geared L-head tool, and wherein said power receiving means comprises spur gear means.

28. A tool as defined in claim 27, wherein said socket means is embodied in said spur gear means.

29. A tool as defined in claim 2, wherein said spring means comprises leaf spring means mounted on said drive head assembly means and operatively engaged with said holder means.

30. A tool as defined in claim 29, which comprises head means on the rearward end of said holder means and engageable against the rearward end of said socket means to limit forward travel of said holder means relative to said socket means;

said head means having an oblong rearward projection thereon; and

said leaf spring means having an elongated slot therein which is generally complementary to said oblong head projection, said projection fitting into said slot so as to secure said holder means against rotation relative to said drive head assembly means.

31. A tool as defined in claim 30, wherein said head projection and leaf spring slot each have opposed, substantially parallel, straight, elongated side edges, such side edges on said head projection being generally aligned with said side edges on said leaf spring slot.

32. A tool as defined in claim 30, wherein there is an increasing gap between said head projection and the edges of said elongated slot from the longitudinal center of said head projection toward its ends to allow some play between said holder means and said drive head assembly means, whereby to rotationally cushion said key means relative to said fastener pin component, and to facilitate rotational alignment of said key means with said hex recess in said pin means.

33. A tool as defined in claim 1, which comprises a manual installation tool.

34. A tool as defined in claim 2, which comprises a manual installation tool.

35. A tool as defined in claim 34, wherein said body means comprises a pair of elongated actuating arms terminating at overlapping drive head portions forming a portion of said drive head assembly means and pivotally connected for relative rotational oscillation;

said rotary power receiving means comprising ratchet gear means.

36. A tool as defined in claim 35, which comprises pawl means in said drive head assembly means pivotally mounted on one of said overlapping head portions and spring-biased against said ratchet gear means;

and

cog lever means in said drive head assembly means pivotally mounted on the other said overlapping head portion and spring-biased against said ratchet gear means.

37. A tool as defined in claim 2, which comprises a pistol grip straight drive installation tool.

38. A tool as defined in claim 37, wherein said spring means comprises helical compression spring means.

39. A tool as defined in claim 37, which comprises stop means interengageable between said holder means and said socket means to limit forward travel of said holder means relative to said socket means.

40. A tool as defined in claim 37, wherein said key holder means and retention means have overlapping hex heads on their rearward ends;

connector means within said tubular socket means, said connector means having a forwardly opening bore within which both of said heads are received; and

nonrotating shaft means extending forwardly from said drive head assembly means through a rearward portion of said socket means, a rearward end portion of said shaft means being held against rotation in said drive head assembly means, and a forward end portion of said shaft means being engageable with said connector means to hold said connector means against rotation;

a rearward portion of said connector means bore having a first bore portion with a hex cross-section, and a forward portion of said connector means bore having a second bore portion with a round cross-section;

said connector means and holder means being in an axially collapsed condition with said hex heads both being located in said hex first bore portion during a fastener installation event so that said connector means holds said holder means and key means against rotation; and

said connector means and holder means being axially extensible to an extended condition for threaded ejection of the key means from the holder means, in which condition said retention shaft means hex head remains in said first bore portion, but said holder means hex head registers with said second bore portion so that said holder means is freely rotatable relative to said connector means, whereby said key means is forwardly threadedly removable from said holder means by relative rotation between said connector means and said holder means in one direction, and another said key means is threadedly replaceable in said holder means by relative rotation between said connector means and said holder means in the other direction.

41. A tool as defined in claim 40, which comprises axial stop means interengageable between said connector means and said holder means to limit the extent of said extended condition and retain said connector means, holder means, retention means, and key means together as an assembly.

42. A tool as defined in claim 41, which comprises quick-release means on the rear end portion of said socket means enabling quick disengagement of said socket means from said drive head assembly means and quick reengagement of said socket means with said drive head assembly means;

said quick-release means enabling said assembly to be quickly removable from said socket means through its rear end for convenience in manipulation of said connector means and holder means for threadedly removing and replacing a said key means from said holder means, and then quickly replaceable within said socket means.