Pressure pad for screw and breakaway pressure screw

Patent metadata

Field	Value
Publication number	US-9702393-B2
Application number	US-201514872413-A
Country	US
Kind code	B2
Filing date	Oct 1, 2015
Priority date	Oct 1, 2014
Publication date	Jul 11, 2017
Grant date	Jul 11, 2017

Abstract

A fastener used to secure an electrical conductor includes a head, a shaft, and a pressure pad. The head has an inner surface for receiving a drive tool. The shaft has an outer surface including a threaded portion. The pressure pad can include a surface feature. The pressure pad can also be releasably, rotationally-fixed to the shaft through a breakaway portion.

First claim

What is claimed:

1. A fastener comprising:
a head having an inner surface for receiving a drive tool;
a shaft having an outer surface including a threaded portion; and
a pressure pad having a surface feature for contacting a conductor, wherein the surface feature comprises at least one serration.

2. The fastener of claim 1 , wherein the surface feature extends circumferentially around the pressure pad.

3. The fastener of claim 1 , wherein the surface feature extends radially from a portion of said pressure pad.

4. The fastener of claim 1 , wherein the surface feature comprises a textured surface.

5. The fastener of claim 1 , wherein the pressure pad is rotatably connected to the shaft.

6. The fastener of claim 1 , wherein the pressure pad includes a breakaway portion with a torque limit connecting the pressure pad to the shaft.

7. The fastener of claim 6 , wherein the pressure pad is rotatably fixed to the shaft prior to the torque limit being exceeded and the pressure pad is rotatably connected to the shaft after the torque limit is exceeded.

8. A fastener comprising:
a head having an inner surface including a first socket for receiving a drive tool;
a shaft having an outer surface including a threaded portion; and
a pressure pad having a breakaway portion with a torque limit connecting the pressure pad to the shaft, wherein the pressure pad is rotatably fixed to the shaft prior to the torque limit being exceeded and the pressure pad is rotatably connected to the shaft after the torque limit is exceeded.

9. The fastener of claim 8 , further comprising a shearable section positioned between the head and the shaft having a second torque limit.

10. The fastener of claim 9 , wherein the second torque limit is greater than the first torque limit.

11. The fastener of claim 8 , wherein the breakaway portion forms a burr on the shaft after the torque limit has been exceeded.

12. The fastener of claim 8 , wherein the pressure pad includes a surface feature.

13. A fastener comprising:
a head having an inner surface including a first socket for receiving a drive tool;
a shaft having an outer surface including a threaded portion;
a shearable section positioned between the head and the shaft having a first torque limit; and
a pressure pad having a surface feature and a breakaway portion with a second torque limit connecting the pressure pad to the shaft, wherein the shaft includes an inner surface for receiving a drive tool.

14. An electrical connector comprising:
a body having a first aperture for receiving a conductor and a second aperture having a thread for receiving a fastener; and
a fastener positioned in the second aperture including a head having an inner surface including a first socket for receiving a drive tool, a shaft having an outer surface including a threaded portion, a shearable section positioned between the head and the shaft having a first torque limit, and a pressure pad having a surface feature and a breakaway portion with a second torque limit connecting the pressure pad to the shaft, wherein the pressure pad is rotatably fixed to the shaft prior to the torque limit being exceeded and the pressure pad is rotatably connected to the shaft after the torque limit is exceeded.

15. A fastener comprising:
a head having an inner surface for receiving a drive tool;
a shaft having an outer surface including a threaded portion; and
a pressure pad having a surface feature for contacting a conductor, wherein the surface feature comprises at least one rounded groove.

16. The fastener of claim 15 , wherein the surface feature extends circumferentially around the pressure pad.

17. The fastener of claim 15 , wherein the surface feature extends radially from a portion of said pressure pad.

18. The fastener of claim 15 , wherein the pressure pad is rotatably connected to the shaft.

19. The fastener of claim 15 , wherein the pressure pad includes a breakaway portion with a torque limit connecting the pressure pad to the shaft.

20. The fastener of claim 19 , wherein the pressure pad is rotatably fixed to the shaft prior to the torque limit being exceeded and the pressure pad is rotatably connected to the shaft after the torque limit is exceeded.

21. A fastener comprising:
a head having an inner surface for receiving a drive tool;
a shaft having an outer surface including a threaded portion; and
a pressure pad having a surface feature for contacting a conductor,
wherein the pressure pad includes a breakaway portion with a torque limit connecting the pressure pad to the shaft, and wherein the pressure pad is rotatably fixed to the shaft prior to the torque limit being exceeded and the pressure pad is rotatably connected to the shaft after the torque limit is exceeded.

22. The fastener of claim 21 , wherein the surface feature comprises at least one serration.

23. The fastener of claim 21 , wherein the surface feature comprises at least one rounded groove.

24. The fastener of claim 21 , wherein the surface feature extends circumferentially around the pressure pad.

25. The fastener of claim 21 , wherein the surface feature extends radially from a portion of said pressure pad.

26. The fastener of claim 21 , wherein the surface feature comprises a textured surface.

Assignees

• Hubbell Inc

Inventors

• Beck Alan Douglas
• Sparks Benjamin Herman
• Baker Barry Lynn

Classifications

• F16B31/021

  by means of a frangible part (F16B31/025, F16B31/028 take precedence; break members in torque limiters or torque indicators in wrenches or screwdrivers B25B23/1415) · CPC title

• F16B31/00 Primary

  Screwed connections specially modified in view of tensile load; Break-bolts (shape of thread {F16B33/02; in couplings F16D9/00}) · CPC title

• H01R4/366 Primary

  intermediate part attached to the tip of the screw · CPC title