Linear fastener system and method for use

• US 7,981,143 B2
• Filed: 09/10/2003
• Issued: 07/19/2011
• Est. Priority Date: 09/10/2003
• Status: Active Grant

• Current Assignee: Spinal LLC
• Original Assignee: Spinal LLC
• Inventors: Doubler, Robert L., Hammill, John E. Sr.
• Primary Examiner(s): Robert; Eduardo C
• Assistant Examiner(s): COMSTOCK, DAVID C
• Application Number:
  US10/661,371
• Publication Number:
  US 20050053423A1
• Time in Patent Office: 2,869 Days
• Field of Search: 606/72, 606/73, 606/104, 623/22.42, 411/39, 411/40, 411/41, 411/42, 411/75
• US Class Current: 606/300
• CPC Class Codes: F16B 37/0864 with the threaded portions of the nut engaging the thread of the bolt by pressing or rotating an external retaining member such as a cap, a nut, a ring or a sleeve F16B37/0835 takes precedence
• CPC Class Codes: Y10T 403/7067 Threaded actuator

Abstract

The present invention provides a linear fastening system capable of rapid engagement and disengagement. More specifically, the system utilizes a cooperating collet member and a compression ring member which are constructed and arranged to slip easily over a shank member. The fastener system is secured by sliding a compression member in a linear overlapping fashion over the collet member thereby utilizing the conical surfaces to compress the collet member to grip the outer surface of the shank member. In this manner, the linear fastener system is capable of providing a secure connection between multiple components without the need to apply rotational torque to the assembly.

Claims

1. A linear fastener system comprising:

a shank member including an outer gripping surface means formed along a first end and a second end;

a collet member having a base end, a top end, an inner engaging surface means configured to mesh with said outer gripping surface means of said shank member, and an outer tapered compression surface; and

a compression ring member having a base end, a front end, an inner tapered compression surface having a substantially conjugate taper conforming to said outer tapered surface of said collet member, and an outer surface;

said inner tapered compression surface of said compression ring member constructed and arranged for linear overlapping movement in relation to said outer tapered compression surface of said collet member between a first gripping position and a second release position, said gripping position resulting in frictional engagement between a substantial portion of said inner tapered compression surface and said outer tapered compression surface to maintain engagement of said collet and said compression ring members and to compress said collet member thereby gripping said outer gripping surface of said shank member and wherein said release position maintains a sufficient portion of said frictional cooperation to maintain an interfitting relationship between said collet and said compression ring members and results in expansion of said collet member thereby releasing said outer gripping surface of said shank member.

2. The linear fastener system of claim 1 wherein said inner engaging surface is generally smooth.

3. The linear fastener system of claim 1 wherein said inner engaging surface is threaded.

4. The linear fastener system of claim 1 wherein said inner engaging surface is knurled.

5. The linear fastener system of claim 1 wherein said inner engaging surface has a conjugate shape in relation to said outer gripping surface of said shank member.

6. The linear fastener system of claim 1 wherein said inner engaging surface has at least one inwardly depending lip, wherein said inwardly depending lip is constructed and arranged to cooperate with a conjugate surface on said outer gripping surface of said shank member.

7. The linear fastener system of claim 6 wherein said inwardly depending lip is constructed and arranged to cooperate with at least one snap ring groove.

8. The linear fastener system of claim 6 wherein said inwardly depending lip includes at least one conical surface;

wherein said outer gripping surface of said shank member has a conjugate conical surface.

9. The linear fastener system of claim 1 wherein said tensioning portion includes at least two generally flat surfaces.

10. The linear fastener system of claim 1 wherein said tensioning portion includes at least one groove extending around the circumference of said first end of said shank member.

11. The linear fastener system of claim 1 wherein said shank member includes a tensioning portion, said tensioning portion includes at least one internal bore extending inwardly from said first end along the longitudinal centerline of said shank member.

12. The linear fastener system of claim 11 wherein said internal bore includes threads.

13. The linear fastener system of claim 11 wherein said internal bore includes at least one groove extending around the circumference of said internal bore.

14. The linear fastener system of claim 1 wherein said outer surface of said compression member includes at least two wrench flats for increasing or decreasing the said tension applied to said shank member.

15. The linear fastener system of claim 1 wherein said collet member is constructed of plastic.

16. The linear fastener system of claim 1 wherein said collet member is constructed of copper.

17. The linear fastener system of claim 1 wherein said collet member is constructed of brass.

18. The linear fastener system of claim 1 wherein said collet member is constructed of bronze.

19. The linear fastener system of claim 1 wherein said collet member is constructed of aluminum.

20. The linear fastener system of claim 1 wherein said collet member is constructed of steel.

21. The linear fastener system of claim 1 wherein said collet member is constructed of rubber.

22. A linear fastener system comprising:

a shank member including an outer gripping surface means formed along a first end and a second end;

a collet member having a base end, a top end, an inner engaging surface means configured to mesh with said outer gripping surface means of said shank member, and an outer tapered compression surface; and

a compression ring member having a base end, a front end, an inner tapered compression surface having a substantially conjugate taper conforming to said outer tapered surface of said collet member, and an outer surface;

said inner tapered compression surface of said compression ring member constructed and arranged for linear overlapping movement in relation to said outer tapered compression surface of said collet member between a first gripping position and a second release position, wherein positioning said inner tapered compression surface over said outer tapered compression surface defines said gripping position to compress said collet member thereby gripping said outer gripping surface of said shank member and wherein positioning first groove over said outer tapered compression surface defines said release position allowing expansion of said collet member thereby releasing said outer gripping surface of said shank member.

23. The linear fastener system of claim 22 wherein said outer tapered compression surface of said collet member and said inner tapered surface of said compression member are constructed and arranged to maintain an interfitting relationship in said release position.

24. The linear fastening system of claim 22 wherein said outer tapered compression surface includes at least one second groove having a reduced diameter with respect to said outer tapered compression surface, said second groove constructed and arranged to align with said groove in said inner surface of said compression ring while in said release position.

25. The linear fastening system of claim 22 wherein said shank member includes a tensioning portion at said first end whereby said shank member is configured to be tensilely loaded when said collet member is in said release position.

26. The linear fastening system of claim 25 wherein said tensioning portion includes a frangible stem, whereby said frangible stem is severed from said first end of said shank member when said shank member reaches a predetermined tension.