Rail accessory mount

Abstract

A u-shaped clamp that includes offset bends at distal ends, accepts a threaded fastener through two apertures, where tightening the fastener brings two flanges of the u-shaped clamp together to grip a wire, a cable or a pipe. An offset bend on one end of one flange serves to hold a wire or cable in position until the fastener is tightened.

Description

BACKGROUND

Current rooftop solar arrays often consist of more than one row of solar modules. These rows of solar modules typically are electrically bonded with a copper wire connected using a fastening mechanism to each row of solar modules. This causes an excessive amount of wire to be used to electrically bond adjacent rows of solar modules.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to describe the manner in which the above-recited and other advantages and features of the disclosure can be obtained, a more particular description of the principles briefly described above will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. Understanding that these drawings depict only exemplary embodiments of the disclosure and are not therefore to be limiting of its scope, the principles herein are described and explained with additional specificity and detail through the use of the accompanying drawings in which:

FIG. 1 illustrates an example according to an embodiment;

FIG. 2 illustrates an example according to an embodiment;

FIG. 3 illustrates an example according to an embodiment;

FIG. 4 illustrates an example according to an embodiment;

FIG. 5 illustrates an example according to an embodiment;

FIG. 6 illustrates an example according to an embodiment;

FIG. 7 illustrates an example according to an embodiment;

FIG. 8 illustrates an example according to an embodiment;

FIG. 9 illustrates an example according to an embodiment;

FIG. 10 illustrates an example according to an embodiment;

FIG. 11 illustrates an example according to an embodiment;

FIG. 12 illustrates an example according to an embodiment;

FIG. 13 illustrates an example according to an embodiment; and

FIG. 14 illustrates an example according to an embodiment.

DETAILED DESCRIPTION

Various embodiments of the disclosure are discussed in detail below. While specific implementations are discussed, it should be understood that this is done for illustration purposes only. A person skilled in the relevant art will recognize that other components and configurations may be used without parting from the spirit and scope of the disclosure.

FIGS. 1 and 2 depict a Rail Accessory Mount 100 in an isometric view. The Rail Accessory Mount in the example embodiment is assembled from a fastener 102, a plate-nut 104, and a grip 106. The fastener 102 may be a hex flange fastener. The plate-nut 104 may have a centrally located threaded aperture through which the fastener threadably engages. The threaded aperture may have a cone extending up in order to provide sufficient threads that otherwise would not be if the plate-nut had no cone. The plate-nut 104 may have curved radii on opposite corners 108 to allow for turning of the plate-nut within a channel free of interference until the length of the plate-nut is substantially perpendicular to a channel. The plate-nut may have upwardly protruding ridges or pyramids to cut through an anodization layer of a rail to create an electrical bond path. A grip 106 may have a substantially flat top surface. The sides of the Grip may taper in towards the distal ends of the Grip, and may have a chamfer on the underside sides. The Grip may have inset curved cut-outs 110 at each distal end that may be asymmetric. A curved flange may extend down from each cut-out. An angled ramp may be located on one side of the curved flange, the ramp face generally tangent to the arc of a central aperture in the Grip. The Grip may have a semi-rectangular ring flange protruding down from the top surface with large radii on opposite corners. The long edges of the ring flange may extend below the main protrusion of the ring, with a locking tab at the distal end. A plurality of ribs may be disposed along the ring flange for added strength. The locking tabs 112 may grip the underside of the plate-nut to prevent it from falling out. Interior (not shown) to the ring flange may be one or more ribs that interact with the cone of the plate-nut to prevent the plate-nut from sliding laterally relative to the Grip. The Grip may be made of a plastic material, and may be formed using an injection molding process.

FIGS. 3 and 4 depict a Rail Accessory Mount 100 being installed into a Rail 300. In this example embodiment, the Rail Accessory Mount is substantially perpendicular to the rail, over a rail channel. The Rail Accessory Mount is placed on top of the rail and turned clock-wise so the plate-nut rotates underneath flanges of the rail. The Angled Ramps on either side of the Grip may interact with the outside edge of the rail to deform the distal ends of the Grip upwards thereby lifting the Curved Flanges above the edges of the rail. Upon transitioning to a parallel position relative to the rail, the Curved Flanges may spring back down into the opening of the rail, thus preventing the Rail Accessory Mount from substantially turning in either direction relative to the rail.

FIG. 5 shows a device installed onto the Rail Accessory Mount. The device may have a slot, which the fastener traverses through until the desired location is achieved. Then the fastener is tightened, securing the device to the rail. When the fastener is rotated, the threads engage the plate-nut, forcing the plate nut against the flanges of the Rail, securing the Rail Accessory Mount to the rail. When the fastener is rotated, the threads engage the plate-nut, forcing the plate nut against the flanges of the Rail, and the bond pyramids cut through the anodization in the rail flanges to create an electrical bond path. The electrical bond path may be from the rail to the device, via the plate-nut and fastener.

FIG. 6 depicts an end view of the Rail Accessory Mount attached to the rail. In this example embodiment, the plate nut is against the flanges of the Rail. An exemplary wire connector and wire are shown in the channel of the Rail, free from interference with the Rail Accessory Mount.

FIGS. 7, 8, and 9 depict the Rail Accessory Mount with a Ground Lug 700 installed. Ground Lug 700 is a u-shaped clamp. In FIGS. 7 and 8, the fastener 102 extends through the two central apertures of the Ground Lug 700 and into the plate-nut 104. The Ground Lug 700 may have a substantially circular flange or lower plate 702 with a substantially centered through-hole. An upper plate or flange 704 may consist of two bodies or portions, the first portion 706 being a circularly shaped flange with a substantially centrally located aperture, which may be over the first aperture to allow easy pass-through of the fastener. The second portion 708 of the upper body may be a spring function with an offset bend, where symmetric arms angle up away from the first plate, then sharply angle downwards to reconnect at a horizontal tab. The Ground Lug or u-shaped clamp 700 may be constructed of a stainless steel or aluminum material, and may be of a substantially uniform material, such as sheet metal. The ground lug may be formed on a progressive die stamping machine.

FIGS. 10 and 11 show two example embodiments of the Ground Lug or u-shaped clamp 700 installed onto a Rail 300. The first example is the Ground Lug installed on a Rail Accessory Mount disposed in the main channel of the Rail. The second example shows the ground lug installed using a fastener disposed into a side channel of the Rail. The first plate of the Ground Lug may have a diameter to extend beyond the opening of the main channel of the Rail. FIG. 11 depicts an example set of wires connected into the Ground Lug. The Spring section of the Ground Lug may allow different size wires to engage into the ground lug and up against the fastener with some force applied, i.e. hand force. Once the wire is engaged into the Ground Lug, the bend in the spring may prevent wire from readily traversing laterally out of the ground lug—i.e. orthogonal to its length. After a wire is engaged into the Ground Lug, the fastener may be tightened, forcing the inner top plate of the ground lug down to squeeze the wire against the lower plate of the Ground Lug. In this configuration, the wire is substantially tangent to the fastener, and held between the two flanges.

FIGS. 12 and 13 show a Cable Grip 1200 installed onto a Rail Accessory Mount. The Cable Grip 1200 is also a u-shaped clamp, and may have a first substantially flat plate or flange with a distal end and a the u-shaped bend at a second distal end. The u-shaped bend connects the lower flange and upper flange, and may form into a top plate of the Cable Grip, then a jog up with an offset bend to an upper flange that extends substantially to be coincident with the first distal end of the first plate or flange. A pair of apertures may be disposed through the Cable Grip in the second plate and first plate to allow a fastener 102 to pass through freely. The second flange may be substantially parallel with the first flange, and may be offset a small amount, such as 1 millimeter. The flange may be offset from the first plate a distance of a standard cable used in solar photovoltaic installations. The flange may be parallel or at a downward angle relative to the first plate. Upon threadably engaging the fastener, the second plate of the flange may be compressed down onto one or more PV cables. The cable grip may be formed of a stainless steel or aluminum material, and may be of a substantially uniform thickness, such as sheet metal. The Cable Grip or u-shaped clamp 1200 may be formed using a progressive die.

FIG. 14 depicts an example use of the Cable Grip 1200, wherein the two Cable Grips are installed on two Rail Accessory Mounts on two rails disposed on a roof surface. A PV cable is routed through the flange and first plate of both Cable Grips, and both fasteners are tightened to substantially prevent the cable from sliding. The pyramids on the plate-nut also prevent the Rail Accessory Mount from sliding laterally in the rail once the fastener has been tightened to a device, ground lug, or Cable Grip.

Claims

1. A u-shaped clamp, comprising: a substantially planar first flange, the first flange having a first aperture; anda second flange, the second flange having a second aperture, wherein the first aperture and the second aperture are configured to allow a fastener to pass through both apertures, wherein the first flange and the second flange connect to each other with a u-shaped bend, the second flange having a substantially planar first portion that surrounds the second aperture, and an second portion having an offset bend, the offset bend on the second portion being opposite the u-shaped bend with respect to the second aperture, the offset bend configured to receive an inserted wire, cable, or pipe in a solar array, and wherein one or more of the flanges is configured to form an electrical bonding connection with the inserted wire, cable, or pipe when the fastener is tightened.

2. The u-shaped clamp of claim 1, wherein the offset bend on the second portion is offset toward the first flange.

3. The u-shaped clamp of claim 2, wherein the offset bend on the second flange is further configured to hold the inserted wire, cable, or pipe substantially tangent to the fastener, when the fastener has been passed through the first and second apertures.

4. The u-shaped clamp of claim 2, wherein the offset bend on the second flange has a terminal portion bent away from the first flange, the bending of the terminal portion configured to facilitate insertion of the wire between the first flange and the second flange.

5. The u-shaped clamp of claim 2, wherein the offset bend provides a spring action to retain the inserted wire between the second flange and the first flange before the fastener is tightened.

6. The u-shaped clamp of claim 2, wherein the first flange and the second flange are brought together when the fastener is tightened, and wherein the substantially planar first flange and the substantially planar first portion of the second flange clamps the inserted wire, cable, or pipe therebetween when the fastener is tightened.

7. The u-shaped clamp of claim 1, wherein the offset bend on the second portion is offset away from the first flange.

8. The u-shaped clamp of claim 7, wherein the offset bend on the second flange has a terminal portion bent toward the first flange, the bending of the terminal portion configured to hold the inserted wire, cable, or pipe between the first flange and the second flange before the fastener is tightened.

9. The u-shaped clamp of claim 1, wherein an outer perimeter of the substantially planar first flange is substantially circular.

10. The u-shaped clamp of claim 1, wherein a diameter of the second aperture is greater than a diameter of the first aperture.

11. The u-shaped clamp of claim 1, wherein the clamp is formed from a substantially uniform thickness metal.

12. The u-shaped clamp of claim 1, wherein the clamp is stainless steel or aluminum.

13. The u-shaped clamp of claim 1, wherein the electrical bonding connection is formed between the clamp, the inserted wire, cable, or pipe, and the fastener.

14. A method of installing a wire, cable, or pipe into the u-shaped clamp of claim 1, the method comprising: inserting the wire, cable, or pipe into a space between the first flange and the second flange; andthreadably tightening the fastener, causing the inserted wire, cable, or pipe to be clamped between the first flange and the second flange.

15. A clamp system for a solar panel array, comprising: a threaded fastener;a threaded nut cooperating with the threaded fastener, anda u-shaped clamp, the u-shaped clamp comprising: a substantially planar first flange, the first flange having a first aperture; anda second flange, the second flange having a second aperture, wherein the first aperture and the second aperture are configured to allow the fastener to pass through both apertures, wherein the first flange and the second flange connect to each other with a u-shaped bend, the second flange having a substantially planar first portion that surrounds the second aperture, and an second portion having an offset bend, the offset bend on the second portion being opposite the u-shaped bend with respect to the second aperture, the offset bend configured to receive an inserted wire, cable, or pipe in a solar array, and wherein one or more of the flanges is configured to form an electrical bonding connection with the inserted wire, cable, or pipe when the fastener is tightened within the apertures.