Electric ground clamp with pivoted jaws and single attached adjusting bolt and terminal block
View Patent ↗An adjustable ground clamp for easy positioning onto electric conduits of different diameters and grounding multiple electrical devices. A first and a second jaw are pivotally connected and have differently angled jaw surfaces. A distal end of the first jaw has an elongated hole and a distal end of the second jaw has a curved fork having a slot for receiving a bolt with a cylindrical nut. A fastener connects a ground conductor or wire to the ground clamp. A terminal block accepts ground conductors from multiple different electrical devices. The jaws may be easily separated for placement of an electrical conduit without separating or detaching any parts from the ground clamp, making attachment to an electrical conduit quick, easy, and secure. The terminal block permits different electrical devices to be grounded with a single ground clamp.
1. An adjustable ground clamp that adjusts to different sizes of electrical conduits comprising:
a first jaw having angled jaw surfaces;
a second jaw having angled jaw surfaces;
a hinge connecting said first and second jaws together;
a first distal end of said first jaw having an elongated hole therein;
a curved fork formed on a second distal end of said second jaw, said curved fork having a slot therein;
a bolt having a head placed through the elongated hole in said first distal end of said first jaw;
a cylindrical nut placed on a threaded end of said bolt and mating with said curved fork;
a ground conductor retainer formed on the adjustable ground clamp; and
a terminal block having a plurality of conductor retainers formed on said terminal block,
whereby said bolt and said cylindrical nut may be removed from said curved fork and said first and second jaws pivoted open for receiving the electrical conduit and said bolt repositioned within the slot with said cylindrical nut held by said curved fork securely retaining the electrical conduit and a plurality of conductors may be held in the plurality of retainers permitting a multiple number of electrical devices to be grounded.
2. An adjustable ground clamp that adjusts to different sizes of electrical conduits as in claim 1 wherein:
the angled jaw surfaces of each of said first and second jaws have different angles relative to a horizontal reference line passing through said hinge.
3. An adjustable ground clamp that adjusts to different sizes of electrical conduits as in claim 2 wherein:
the different angles relative to a horizontal reference line comprise 45° and 60°.
4. An adjustable ground clamp that adjusts to different sizes of electrical conduits as in claim 1 wherein:
the angled jaw surfaces of each of said first and second jaws are separated by 105° degrees.
5. An adjustable ground clamp that adjusts to different sizes of electrical conduits as in claim 1 wherein:
said ground conductor retainer comprises a stem placed on said first jaw, a lip placed on said first jaw adjacent the stem, and a screw extending through the stem, whereby a ground conductor may be positioned adjacent the stem and securely held by the lip and the screw.
6. An adjustable ground clamp that adjusts to different sizes of electrical conduits as in claim 1 wherein:
said ground conductor retainer comprises a lug having a through hole, a threaded hole, and a screw placed in the threaded hole.
7. An adjustable ground clamp that adjusts to different sizes of electrical conduits as in claim 1 wherein:
said ground conductor retainer comprises a pad, a threaded hole in the pad, and a screw placed within the threaded hole.
8. An adjustable ground clamp that adjusts to different sizes of electrical conduits as in claim 1 wherein:
the plurality of conductor retainers comprises a plurality of holes and a plurality of screws, wherein one each of said plurality of screws intersects with one each of said plurality of holes,
whereby a conductor is securely held in each of said plurality of holes.
9. An adjustable ground clamp that adjusts to different sizes of electrical conduits as in claim 1 wherein:
said terminal block is formed on said first jaw.
10. An adjustable ground clamp that adjusts to different sizes of electrical conduits without detachment of any parts comprising:
a first jaw having a first at least two angled jaw surfaces with different angles relative to a first intermediate surface between each of the first at least two angled jaw surfaces;
a second jaw having a second at least two angled jaw surfaces with different angles relative to a second intermediate surface between each of the second at least two angled jaw surfaces;
a hinge connecting said first and second jaws together;
a first distal end of said first jaw having an elongated hole therein;
a curved fork formed on a second distal end of said second jaw, said curved fork having a slot therein;
a bolt having a head placed through the elongated hole in said first distal end of said first jaw;
a cylindrical nut having a diameter placed on a threaded end of said bolt, the diameter of said cylindrical nut mating with a radius of said curved fork;
a ground conductor retainer formed on the adjustable ground clamp; and
a terminal block having a plurality of conductor retainers formed on said terminal block,
whereby said bolt and said cylindrical nut may be removed from said curved fork and said first and second jaws pivoted open for receiving the electrical conduit and the bolt repositioned within the slot with said cylindrical nut held by said curved fork securely retaining the electrical conduit and a plurality of conductors may be held in the plurality of retainers permitting a multiple number of electrical devices to be grounded.
11. An adjustable ground clamp that adjusts to different sizes of electrical conduits without detachment of any parts as in claim 10 wherein:
the different angles relative to the first and second intermediate surfaces and the first and second at least two angled jaw surfaces comprise 150° and 135°.
12. An adjustable ground clamp that adjusts to different sizes of electrical conduits without detachment of any parts as in claim 10 wherein:
said ground conductor retainer comprises a stem placed on said first jaw, a lip placed on said first jaw adjacent the stem, and a screw extending through the stem, whereby a ground conductor may be positioned adjacent the stem and securely held by the lip and the screw.
13. An adjustable ground clamp that adjusts to different sizes of electrical conduits without detachment of any parts as in claim 10 wherein:
said ground conductor retainer comprises a lug having a through hole, a threaded hole, and a screw placed in the threaded hole.
14. An adjustable ground clamp that adjusts to different sizes of electrical conduits without detachment of any parts as in claim 10 wherein:
said ground conductor retainer comprises a pad, a threaded hole in the pad, and a screw placed within the threaded hole.
15. An adjustable ground clamp that adjusts to different sizes of electrical conduits as in claim 10 wherein:
the plurality of conductor retainers comprises a plurality of holes and a plurality of screws, wherein one each of said plurality of screws intersects with one each of said plurality of holes,
whereby a conductor is securely held in each of said plurality of holes.
16. An adjustable ground clamp that adjusts to different sizes of electrical conduits as in claim 10 wherein:
said terminal block is formed on said first jaw.
17. An adjustable ground clamp that adjusts to different sizes or diameters of electrical conduits without detachment of any parts that can be quickly and easily placed on an electrical conduit comprising:
a first jaw;
a first inside angled surface formed on said first jaw;
a first outside angled surface formed on said first jaw;
a first intermediate surface formed on said first jaw between said first inside angled surface and said first outside angled surface;
wherein an angle is formed between said first inside angled surface and said first outside angled surface of substantially one-hundred and five degrees;
a second jaw;
a second inside angled surface formed on said second jaw;
a second outside angled surface formed on said second jaw;
a second intermediate surface formed on said second jaw between said second inside angled surface and said second outside angled surface;
wherein an angle is formed between said second inside angled surface and said second outside angled surface of substantially one-hundred and five degrees;
a hinge connecting said first and second jaws together;
a first distal end of said first jaw having an elongated hole therein;
a curved fork formed on a second distal end of said second jaw, said curved fork having a radius and a slot formed therein;
a bolt having a head placed through the elongated hole in said first distal end of said first jaw and having a threaded portion adapted to fit within the slot formed in said curved fork;
a cylindrical nut having a diameter placed on the threaded portion of said bolt, the diameter of said cylindrical nut mating with the radius of said curved fork;
a stem placed on said first jaw;
a lip placed on said first jaw adjacent said stem; and
a screw extending through said stem, so that a ground conductor may be positioned adjacent said stem and securely held by said lip and said screw;
a terminal block having a plurality of conductor retainers formed on said terminal block,
whereby said bolt and said cylindrical nut may be removed from the curved fork and said first and second jaws pivoted open for receiving the electrical conduit and the bolt repositioned within the slot with said cylindrical nut held by said curved fork securely retaining the electrical conduit between said first and second jaws and a plurality of conductors may be held in the plurality of retainers permitting a multiple number of electrical devices to be grounded.
18. An adjustable ground clamp that adjusts to different sizes of electrical conduits as in claim 17 wherein:
the plurality of conductor retainers comprises a plurality of holes and a plurality of screws, wherein one each of said plurality of screws intersects with one each of said plurality of holes,
whereby a conductor is securely held in each of said plurality of holes.