In-grade lighting fixture
View Patent ↗An in-grade light fixture has a lamp compartment having an open upper end with a lens cover covering the open upper end. The lens cover may have a joint connection to permit travel from an open configuration to a closed configuration. A junction box is adjacent to the lens cover along an upper portion of the compartment. If a ballast is utilized for proper supply of power to the lamp, a ballast compartment is adjacent an open lower end of the lamp compartment. A hydraulic isolation chamber extends vertically downward from the junction box to the sealed ballast compartment. The hydraulic isolation chamber is filled with a potting material and prevents wicking of moisture into the ballast compartment.
1. An in-grade light fixture comprising:
a lamp compartment having an upper end and a lower end, said upper end covered by a lens cover in sealing engagement with said lamp compartment, said lamp compartment containing a lamp; and
a joint mechanism on said lens cover having an arm interacting with a socket of said lamp compartment permitting rotational and translational movement of said lens cover from a closed position to an open position relative to said lamp compartment; and
a ballast compartment adjacent said lower end of said lamp compartment, said ballast compartment separated from said lamp compartment by a ballast cover in sealing engagement with said ballast compartment, said ballast compartment containing a ballast box in electrical communication with said lamp.
2. The in-grade light fixture as in claim 1 wherein said ballast cover has an upper surface and a lower surface, said upper surface has a handle and said lower surface has a depending bracket supporting said ballast box, said ballast cover has an opening between said upper surface and said lower surface containing a grommet, said grommet sealing a wire extending from said ballast box into said lamp compartment.
3. The in-grade light fixture as in claim 2 further comprising a gasket positioned between said ballast cover and said ballast compartment, said gasket seals against a substantially vertical peripheral surface and a substantially horizontal annular surface of said ballast compartment.
4. The in-grade light fixture as in claim 3 wherein said substantially horizontal annular surface of said ballast compartment has a plurality of bosses.
5. The in-grade light fixture as in claim 1 wherein said ballast cover further has an opening and a wire connected to said ballast box and sealingly extending into said lamp compartment through said opening.
6. The in-grade light fixture as in claim 5 wherein said opening further has a grommet therein sealing said wire extending through said ballast cover.
7. The in-grade light fixture as in claim 1 wherein said lens cover includes a lens and a gasket between said lens and said lamp compartment.
8. An in-grade light fixture comprising:
a lamp compartment having an upper end and a lower end, said upper end covered by a lens cover in sealing engagement with said lamp compartment, said lamp compartment containing a lamp;
a socket adjacent said lamp compartment, said socket having an elongated cam mechanism;
an arm projecting from said lens cover having opposing projections, said opposing projections engage along said elongated cam mechanism of said socket to permit said lens cover to travel from a closed position to an open position relative to said compartment;
a lamp power device compartment adjacent said lower end of said lamp compartment, said lamp power device compartment separated from said lamp compartment by a lamp power device cover in sealing engagement with said lamp power device compartment;
a lamp power device retained within said lamp power device compartment and extending through said lamp power device cover, said lamp power device mounted on a substantially vertical projection of said lamp power device cover; and
a wire in communication from said lamp power device through said lamp power device cover to said lamp.
9. The in-grade light fixture as in claim 8 wherein said lamp power device is a ballast box.
10. The in-grade light fixture as in claim 8 wherein said lamp power device cover further has a depending projection whereby said lamp power device is attached thereto.
11. The in-grade light fixture as in claim 8 wherein said lamp power device cover further has a grommet sealing said wire through said lamp device cover.
12. The in-grade light fixture as in claim 8 further has a gasket in position between said lamp power device cover and said lamp power device compartment.
13. The in-grade light fixture as in claim 12 wherein said lamp power device compartment further has a plurality of bosses whereby limiting the compression of said gasket.
14. An in-grade light fixture comprising:
a lamp compartment having a rim, an upper end and a lower end, said upper end covered by a lens cover in sealing engagement with said lamp compartment, said lamp compartment containing a lamp;
said lens cover having a projecting arm releasably received in an arm receptacle at said lamp compartment rim allowing said lens cover to rotate and translate from a sealed position to an open position relative to said lamp compartment rim and be moved away from said lamp compartment rim and removed;
a ballast compartment adjacent said lower end of said lamp compartment, said ballast compartment separated from said lamp compartment by a ballast cover in sealing engagement with said ballast compartment, said ballast compartment containing a ballast box;
a side car junction box adjacent said lens cover and having an upper end covered by a junction box cover in sealing engagement with said side car junction box; and
a substantially vertical hydraulic isolation chamber in pathway communication with said side car junction box and extending to said ballast compartment.
15. The in-grade light fixture as in claim 14 wherein said hydraulic isolation chamber further includes a potting material.
16. The in-grade light fixture as in claim 14 wherein said ballast box is releasably secured to said ballast cover.
17. The in-grade light fixture as in claim 14 wherein said lens cover includes a lens and a gasket between said lens and said lamp compartment.
18. The in-grade light fixture as in claim 14 further comprises a gasket in position between said ballast cover and said ballast compartment.
19. The in-grade light fixture as in claim 14 wherein said ballast cover further has an electrical conduit connecting said ballast box and said lamp in sealing engagement therethrough.
20. The in-grade light fixture as in claim 14 wherein said ballast cover further has a grommet sealing said electrical conduit through said ballast cover.