Electrical mounting device front with plate and retractable clamp arms for rapid mounting using hole saw
An electrical mounting device for securing an electrical component or fixture on a wall. The mounting device includes a front plate with an opening therein and a rearward extending portion surrounding the opening. The rearward extending portion may be in the form of a peripheral wall with an open back or a peripheral wall with a rear wall defining an enclosure therein. Bosses with oversize apertures are provided in the plate for accommodating mounting fasteners. Clamp arms are secured rigidly to the ends of the mounting fasteners. The peripheral wall is dimensioned slightly less than the diameter of a standard size hole-saw. The clamp arms can be adjusted to a retracted position for insertion on a wall or to an extended position for securing the electrical mounting device to a wall. The electrical mounting device significantly reduces the time required for mounting an electrical component on a wall.
1. An electrical mounting device for mounting an electrical component to a wall comprising:
a plate including a rear surface and an opening therein;
a sidewall extending rearward from said plate, said sidewall including an outer periphery;
said sidewall includes a circular sidewall portion having an outer diameter and no portion of said sidewall extending beyond said outer diameter of said circular sidewall portion;
a mounting fastener including an end extending through said plate, said mounting fastener capable of free rotation within said plate;
a clamp arm rigidly secured to said end of said mounting fastener whereby said clamp arm rotates with rotation of said mounting fastener;
a first edge on said sidewall for stopping the rotation of said clamp arm in a retracted position whereby said clamp arm is retracted within said outer periphery of said sidewall; and
a second edge on said sidewall for stopping the rotation of said mounting fastener in an extended position whereby said clamp arm is extended outward of said outer periphery of said sidewall.
2. The electrical mounting device of claim 1 wherein
said first edge is located at a second diameter;
said second diameter is smaller than said outer diameter of said circular portion; and
said first edge stopping counterclockwise rotation of said mounting fastener and positioning said clamp arm in said retracted position.
3. The electrical mounting device of claim 2 wherein
said second edge is located at said outer diameter; and
said second edge stopping clockwise rotation of said mounting fastener and positioning said clamp arm in said extended position.
4. The electrical mounting device of claim 1 including
an inner periphery on said sidewall;
a mounting boss integral with said inner periphery of said sidewall; and
an oversize aperture in said mounting boss,
whereby said mounting fastener extends through said oversize aperture.
5. The electrical mounting device of claim 1 including
a post adjacent said mounting boss; and
said post extending rearward from said sidewall.
6. The electrical mounting device of claim 5 wherein said post is substantially L-shaped and includes said first edge and said second edge.
7. The electrical mounting device of claim 6 wherein said plate, said sidewall, and said rearward extending post forms a low voltage frame member.
8. The electrical mounting device of claim 1 wherein said sidewall is closed by a rear wall creating an electrical enclosure therein.
9. The electrical mounting device of claim 8 wherein said plate, said sidewall, and said rear wall form an electrical box for the receipt of high voltage electrical components.
10. The electrical mounting device of claim 1 including
a recessed area in said sidewall for accommodating said clamp arm in said retracted position;
said first edge is on a first portion said recessed area of said sidewall; and
said second edge is on a second portion said recessed area of said sidewall.
11. The electrical mounting device of claim 10 wherein said second edge is an integral extension extending outward from said recessed area of said sidewall.
12. The electrical mounting device of claim 1 including
two of said mounting fasteners;
said opening in said plate includes corners; and
said mounting fasteners are located at opposing diagonal corners of said opening in said plate.
13. The electrical mounting device of claim 1 wherein said clamp arm includes
a base portion with a bore therein;
a stem portion extending from said base portion;
a tab extending laterally from said stem portion; and
a flat front portion.
14. The electrical mounting device of claim 13 wherein
said clamp arm is connected to said mounting fastener at said base portion;
said tab of said clamp arm engages said second edge of said sidewall for positioning said clamp arm in said extended position.
15. The electrical mounting device of claim 1 wherein said plate includes
an inner periphery on said plate surrounding said opening; and
two component bosses along said inner periphery of said opening.
16. The electrical mounting device of claim 15 wherein
said opening in said plate includes a longitudinal axis and a lateral axis; and
said component bosses are located at opposing sides along said longitudinal axis of said opening.
17. The electrical mounting device of claim 16 including a channel extending rearward from each of said component bosses along said circular portion of said sidewall.