Power distribution assembly with grounding feature

• US 7,993,150 B1
• Filed: 03/12/2010
• Issued: 08/09/2011
• Est. Priority Date: 03/12/2010
• Status: Active Grant

• Current Assignee: Haworth Incorporated, Innotec, Corp.
• Original Assignee: Haworth Incorporated, Innotec, Corp.
• Inventors: King, Steve, Wiersema, Mark, Elzinga, Jason, DeYoung, Jonathan R., Moerler, Doug, Emery, Dave, Crow, Derek, Danz, Duane
• Primary Examiner(s): Gushi; Ross N
• Application Number:
  US12/661,221
• Time in Patent Office: 515 Days
• Field of Search: 439207-216, 298/57
• US Class Current: 439/215
• CPC Class Codes: H01R 25/14 Rails or bus-bars constructed so that the counterparts can be connected thereto at any point along their length supporting elements for lighting devices, displaceable along guiding elements and making electrical contact with conductors running along the guiding elements F21V21/35
• CPC Class Codes: H01R 4/66 Connections with the terrestrial mass, e.g. earth plate, earth pin

Abstract

A power distribution assembly (PDA) is provided with a support rail having a bendable grounding arm. This grounding arm extends from at least one axial end of the metal support rail and is bendable downwardly so as to overlie an end face of a power block on the PDA. The grounding arm includes a connector flange that projects inwardly through an access window formed in the power block, which connector flange is tight-fittingly engaged with an internal ground terminal upon insertion of the connector flange into the access window during downward bending of the grounding arm.

Claims

1. A modular power distribution assembly comprising:

an electrically conductive support rail extending between opposite ends of said power distribution assembly, said support rail having opposite ends and a peripheral rail edge, wherein at least one end of said support rail includes a grounding member which is disposed outwardly of said peripheral rail edge in an initial position, said grounding member being displaceable from said initial position to an engagement position oriented transverse to the support rail, said grounding member further including a connector flange projecting sidewardly from said grounding member when in said engagement position;

at least one power block assembly disposed along the length of said support rail which comprises a housing defined by an exterior housing body that defines an interior housing chamber, a plurality of terminal ports formed through said housing wall to permit plugging engagement of an electrical component to said block assembly, a plurality of electrical terminals within said housing chamber which are accessible respectively through said access ports and which define one or more electrical circuits comprising hot, neutral and ground terminals, said housing body further including an access window disposed separate from said access ports, which said access window aligns with a terminal edge of said ground terminal;

a plurality of elongate electrical conductors having terminal ends which extend into said housing body and said interior chamber thereof and are each electrically connected to a respective one of said terminals, said conductors extending along said support rail and being supported thereby, at least a portion of said conductors being associated with said hot and neutral terminals and being electrically insulated from said support rail; and

said grounding member when in said initial position being spaced from said housing body, and said grounding member, when in said engagement position, extending along at least a portion of said housing body and having said connector flange thereof projecting sidewardly through said access window into said housing body, said connector flange being in fixed contacting engagement with said grounding terminal within said interior chamber to define a grounded connection between said support rail and said ground terminal and said conductor connected thereto.

2. The power distribution assembly according to claim 1, wherein said grounding member comprises an elongate strap having one end fixedly interconnected with said support rail proximate said peripheral edge thereof, and an opposite end having said connector flange disposed thereon.

3. The power distribution assembly according to claim 2, wherein said strap is formed in cantilevered relation with said support rail and is bendable from said initial position to said engagement position.

4. The power distribution assembly according to claim 3, wherein said connector flange comprises first and second projections which define a narrow slot therebetween, said slot tight-fittingly receiving said ground terminal therein for tight-fitting engagement of said connector flange to said ground terminal which defines said grounded connection therebetween.

5. The power distribution assembly according to claim 1, wherein said support rail and said grounding member are formed in a unitary construction with said grounding member projecting sidewardly in cantilevered relation with said support rail and being bendable by deformation of a portion of said grounding member from said initial position to said engagement position.

6. The power distribution assembly according to claim 5, wherein said housing body includes retainers which engage with said grounding member when displaced to said engagement position to fixedly maintain said grounding member in said engagement position.

7. A modular power distribution system comprising a power distribution assembly and an electrical component connectable thereto, said power distribution assembly comprising:

an electrically conductive support member configured to support said power distribution assembly on a support structure, said support member having opposite ends and a peripheral edge, wherein said peripheral edge includes a grounding member which projects outwardly from said peripheral edge in an initial position, said grounding member having a fixed end fixed to said support member and a free end which is displaceable to reorient said grounding member from said initial position to an engagement position oriented transverse to the initial position, said grounding member further including an engagement section disposed on one side of said grounding member;

at least one power block assembly supported by said support member which comprises an insulative housing comprising an exterior housing body defining an interior housing chamber, a plurality of terminal ports formed through said housing wall to permit plugging engagement of an electrical component, and a plurality of conductive electrical terminals within said housing chamber which are accessible respectively through said access ports and which define one or more electrical circuits comprising hot, neutral and ground terminals, said housing being mounted to said support member with said grounding member disposed in said initial position, said housing body further including an access window disposed separate from said access ports, which said access window aligns with an exposed portion of said ground terminal; and

said grounding member when in said initial position being spaced from said housing body to permit assembly of said housing to said support member, and said grounding member, when in said engagement position, extending along at least a side portion of said housing body and having said engagement section thereof projecting sidewardly through said access window into said housing body, said engagement section being in fixed contacting engagement with said grounding terminal within said interior chamber to define a grounded connection between said support member and said ground terminal.

8. The power distribution system according to claim 7, wherein said engagement section of said power distribution assembly is in a first orientation in said initial position and a second orientation transverse to said first orientation when in said engagement position.

9. The power distribution system according to claim 8, wherein said ports are formed in a first face of said housing and said access window is formed in a second face of said housing.

10. The power distribution system according to claim 7, wherein said terminals connect to a respective plurality of elongate electrical conductors having terminal ends which extend into said housing body and said interior chamber thereof and are each electrically connected to a respective one of said terminals, said conductors extending along said support member and being electrically insulated from said support member.

11. The power distribution system according to claim 7, wherein said grounding member comprises an elongate strap having said fixed end is fixedly interconnected with said support member proximate a peripheral edge thereof, and said free end having said engagement section disposed thereon.

12. The power distribution system according to claim 11, wherein said strap is formed in cantilevered relation with said support member and is bendable from said initial position to said engagement position.

13. The power distribution system according to claim 7, wherein said grounding terminal has an exposed terminal portion thereof which is accessible through said access window, said engagement section defines a seat which tight-fittingly receives said exposed terminal portion therein for tight-fitting engagement of said grounding member to said ground terminal.

14. The power distribution system according to claim 13, wherein said housing body includes retainers which lockingly engage with said grounding member when displaced to said engagement position to fixedly maintain said grounding member in said engagement position.

15. The power distribution system according to claim 7, wherein said housing body includes retainers which lockingly engage with said grounding member when displaced to said engagement position to fixedly maintain said grounding member in said engagement position.

16. A modular power distribution system comprising a power distribution assembly and an electrical component connectable thereto, said power distribution assembly comprising:

an electrically conductive support member configured to support said power distribution assembly on a support structure, said support member including a repositionable grounding member which projects outwardly from said support member in an initial position and is displaceable to reorient said grounding member from said initial position to an engagement position oriented transverse to the initial position, said grounding member further including an engagement section disposed on one side of said grounding member, said engagement section of said power distribution assembly being in a first orientation in said initial position and a second orientation transverse to said first orientation when in said engagement position;

at least one power block assembly supported by said support member which comprises an insulative housing comprising an exterior housing body defining an interior housing chamber, a plurality of terminal ports formed through said housing wall to permit plugging engagement of said electrical component, and a plurality of conductive electrical terminals within said housing chamber which are accessible respectively through said access ports and which define one or more electrical circuits comprising hot, neutral and ground terminals, said housing body further including an access window disposed separate from said access ports, which said access window aligns with an exposed terminal portion of said ground terminal; and

said grounding member when in said initial position being spaced from said housing body, and when in said engagement position, being disposed exteriorly of said housing body and having said engagement section thereof projecting through said access window into said housing body, said engagement section being in grounded engagement with said grounding terminal; and

said housing body including retainers which lockingly engage with said grounding member when displaced to said engagement position to fixedly maintain said grounding member in said engagement position.

17. The power distribution assembly according to claim 16, wherein said grounding member comprises an elongate strap having a fixed end fixedly interconnected with said support member proximate a peripheral edge thereof, and a free end having said engagement section disposed thereon.

18. The power distribution assembly according to claim 16, wherein said grounding member comprises an elongate strap formed in cantilevered relation with said support member, said strap being bendable from said initial position to said engagement position.

19. The power distribution assembly according to claim 18, wherein said retainers snap lockingly engage said strap.

20. The power distribution assembly according to claim 16, wherein said retainers are formed on said housing body proximate said access window.