Breakaway pressure screw

Patent metadata

Field	Value
Publication number	US-9835192-B2
Application number	US-201514872386-A
Country	US
Kind code	B2
Filing date	Oct 1, 2015
Priority date	Oct 1, 2014
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

A fastener includes a head, a shaft, and a pressure pad. The head has an outer surface for engaging a drive tool. The shaft has an outer surface including a threaded portion. The pressure pad has a breakaway portion with a torque limit connecting the pressure pad to the shaft.

First claim

What is claimed:

1. A fastener comprising:
a head having an outer surface for engaging 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.

2. The fastener of claim 1 , further comprising a shearable section positioned between the head and the shaft having a second torque limit.

3. The fastener of claim 2 , wherein the second torque limit is greater than the first torque limit.

4. The fastener of claim 1 , wherein the breakaway portion forms a burr on the shaft after the torque limit has been exceeded.

5. The fastener of claim 1 , wherein the head comprises a hexagonal outer surface.

6. The fastener of claim 1 , wherein the head is a first head and the fastener further comprises a second head and a shearable section positioned between the first head and the second head.

7. The fastener of claim 6 , wherein the first head is smaller than the second head.

8. The fastener of claim 6 , further comprising a second shearable section positioned between the second head and the shaft.

9. The fastener of claim 6 , further comprising a third head positioned between said second head and said shaft.

10. The fastener of claim 9 , further comprising a third shearable portion positioned between the third head and the shaft.

11. The fastener of claim 10 , wherein a socket extends through the first, second, and third heads, and into the shaft.

12. The fastener of claim 6 , wherein the first and second heads have an outer surface for engaging a drive tool.

13. The fastener of claim 6 , wherein the first and second heads have an inner surface for receiving a drive tool.

14. The fastener of claim 6 , wherein the shaft has an inner surface for receiving a drive tool.

15. 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 a surface for engaging 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 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.

16. The electrical connector of claim 15 , 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.

17. The electrical connector of claim 15 , further comprising a second head and a second shearable section positioned between the first head and the second head.

Assignees

• Hubbell Inc

Inventors

• Castonguay Kevin Normand

Classifications

• H01R4/36

  Conductive members located under tip of screw · CPC title

• F16B31/021 Primary

  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