Grounding clamps and torque-controlled fasteners

Patent metadata

Field	Value
Publication number	US-10714844-B2
Application number	US-201816146127-A
Country	US
Kind code	B2
Filing date	Sep 28, 2018
Priority date	Oct 2, 2017
Publication date	Jul 14, 2020
Grant date	Jul 14, 2020

Abstract

Various implementations of grounding clamps and torque-controlled fasteners are disclosed. The grounding clamps may be used to attach grounding conductors to various structures, such as pipes, conduit, grounding rods etc. The torque-controlled fasteners may use various techniques to control the amount of torque applied to the fasteners used with the grounding clamps described herein.

First claim

The invention claimed is:

1. A grounding clamp, comprising:
a clamp including an upper jaw and a lower jaw rotatable about a pivot point at respective first ends and biased in a closed position by a spring, the upper jaw and the lower jaw each having a respective concave second end opposite the first end, the concave second ends of the upper jaw and the lower jaw forming a recess;
a torque-controlled fastener extending through the upper jaw and at least partially through the lower jaw, wherein the torque-controlled fastener is configured to control a predetermined amount of force applied by the upper jaw and the lower jaw, by rotation of the upper jaw and the lower jaw about the pivot point.

2. The grounding clamp of claim 1 , wherein the torque-controlled fastener includes a threaded portion including a first set of angled teeth;
a driving mechanism including a second set of angled teeth and configured to loosen and tighten the torque-controlled fastener by applying a torque to the threaded portion; and
a compression spring biasing the driving mechanism against a head of the threaded portion such that the first set of angled teeth mates with the second set of angled teeth,
wherein the second set of angled teeth slips against the first set of angled teeth when the torque applied to the threaded portion by the driving mechanism exceeds a specified amount of torque.

3. The grounding clamp of claim 1 , further comprising:
an attachment port configured to accept a grounding conductor.

4. The grounding clamp of claim 1 , wherein teeth are formed in the second ends of the upper jaw and lower jaw.

5. The grounding clamp of claim 1 , wherein the spring applies a torsion force to the upper jaw and lower jaw about the pivot point.

6. The grounding clamp of claim 1 , wherein the lower jaw includes a nut that is threadably connected to the torque-controlled fastener.

7. The grounding clamp of claim 1 , wherein the upper jaw and lower jaw each include a protrusion extending from the first end configured to rotate the upper jaw and lower jaw against the spring bias.

8. A grounding clamp, comprising:
an upper jaw and a lower jaw rotatable about a pivot point at respective first ends and biased in a closed position by a spring, the upper jaw and the lower jaw each having a respective concave second end opposite the first end, the concave second ends of the upper jaw and the lower jaw forming a recess;
a fastener extending through the upper jaw and at least partially through the lower jaw, the fastener configured to adjust an amount of force applied by the upper jaw and the lower jaw, by rotation of the upper jaw and the lower jaw about the pivot point.

9. The grounding clamp of claim 8 , further comprising:
an attachment port configured to accept a grounding conductor.

10. The grounding clamp of claim 8 , wherein teeth are formed in the second ends of the upper jaw and lower jaw.

11. The grounding clamp of claim 8 , wherein the spring applies a torsion force to the upper jaw and lower jaw about the pivot point.

12. The grounding clamp of claim 8 , wherein the lower jaw includes a nut that is threadably connected to the torque-controlled fastener.

13. The grounding clamp of claim 8 , wherein the upper jaw and lower jaw each include a protrusion extending from the first end configured to rotate the upper jaw and lower jaw against the spring bias.

14. A torque-controlled fastener, comprising:
a threaded portion including a first set of angled teeth;
a driving mechanism including a second set of angled teeth, the driving mechanism to loosen and tighten the threaded screw by applying a torque to the threaded screw; and
a compression spring biasing the driving mechanism against a head of the threaded portion such that the first set of angled teeth mates with the second set of angled teeth,
wherein the second set of angled teeth slips against the first set of angled teeth when the torque applied to the threaded portion by the driving mechanism exceeds a specified amount of torque.

Assignees

• Panduit Corp

Inventors

• Osenga David K

Classifications

• H01R4/40 Primary

  Pivotable clamping member · CPC title

• H02G13/40

  Connection to earth · CPC title

• H01R11/15

  Hook in the form of a screw clamp · CPC title

• B25B5/103

  with a hinge · CPC title

• B25B5/163

  Jaws or jaw attachments · CPC title