Door frame for lensed troffer
First Claim
1. A lighting fixture having at least one lamp carried within a housing assembly, comprising:
- a door frame mounted for movement relative to the housing assembly to facilitate access to the interior of the lighting fixture, portions of the housing assembly defining a recess dimensioned to receive the door frame thereinto;
a lighting panel carried by the door frame and disposed in operative relation to the at least one lamp; and
, light trap means formed integrally with at least portions of the door frame and cooperating with portions of the housing assembly for minimizing light leakage from the lighting fixture through spaces disposed between the door frame and the housing assembly, the light trap means comprising flange-like extensions formed along side edges of the door frame and extending outwardly of the fixture and in covering relation to interfaces between the door frame and the housing assembly.
3 Assignments
0 Petitions
Accused Products
Abstract
A door frame hingeably mounted to a lensed fluorescent troffer lighting fixture and carrying a prismatic lens cover, the door frame also integrally provides a light trap function. Structural components of the door frame have fastening elements formed integrally therewith for attachment of said components together without the use of separate fastening elements. The door frame includes low profile latching structure which allows ready opening of the door frame for relamping or other maintenance functions, hinge elements acting not only to hold the door frame to the light fixture but also to hold the door frame in a fully open position. The door frame further acts to impart rigidity to the lighting fixture when in a closed position.
59 Citations
79 Claims
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1. A lighting fixture having at least one lamp carried within a housing assembly, comprising:
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a door frame mounted for movement relative to the housing assembly to facilitate access to the interior of the lighting fixture, portions of the housing assembly defining a recess dimensioned to receive the door frame thereinto;
a lighting panel carried by the door frame and disposed in operative relation to the at least one lamp; and
,light trap means formed integrally with at least portions of the door frame and cooperating with portions of the housing assembly for minimizing light leakage from the lighting fixture through spaces disposed between the door frame and the housing assembly, the light trap means comprising flange-like extensions formed along side edges of the door frame and extending outwardly of the fixture and in covering relation to interfaces between the door frame and the housing assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 23, 39, 42)
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14. A lighting fixture having at least one lamp carried within a housing assembly, comprising:
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a door frame mounted for movement relative to the housing assembly to facilitate access to the interior of the lighting fixture;
a lighting panel carried by the door frame and disposed in operative relation to the at least one lamp;
light trap means formed integrally with at least portions of the door frame for minimizing light leakage from the lighting fixture through spaces disposed between the door frame and the housing assembly; and
,means carried by the door frame and cooperating with slots formed in the housing assembly for latching the door frame to the housing assembly, the latching means comprising at least one spring-like body element receivable within one of the slots and a manually manipulable plate element joined to the body element and extending externally of the lighting fixture at a locus of the door frame, manipulation of the plate element causing disengagement of the body element carried by the door frame from the slot formed in the housing assembly, thereby to release the door frame from the housing assembly on at least one side of the door frame. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 24)
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25. A lighting fixture having at least one lamp carried within a housing assembly, comprising:
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a door frame mounted for movement relative to the housing assembly to facilitate access to the interior of the lighting fixture;
a lighting panel carried by the door frame and disposed in operative relation to the at least one lamp;
light trap means formed integrally with at least portions of the door frame for minimizing light leakage from the lighting fixture through spaces disposed between the door frame and the housing assembly; and
,means carried by the door frame and cooperating with slots formed in the housing assembly for hinging the door frame to the housing assembly, the hinging means comprising a body element extending from connection to the door frame, the body element having a predetermined width and an elongated tab terminating the body element and having a length greater than the width of the body element, the slot having an upper portion formed of dimensions capable of receiving the elongated tab thereinto and a lower portion having a width less than the length of the tab and being slightly greater than the width of the body element, the body element being fitted into the lower portion of the slot after insertion of the tab through the upper portion of the slot, the tab being of a length which is too great to fit through the lower portion of the slot, thereby mounting the hinge means within the slot for movement of the door frame about an edge thereof joined to the housing assembly by said hinge means. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A lighting fixture having at least one lamp carried within a housing assembly, comprising:
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a door frame mounted for movement relative to the housing assembly to facilitate access to the interior of the lighting fixture, wherein the door frame is formed of elongated bar elements joined together at end portions thereof;
a lighting panel carried by the door frame and disposed in operative relation to the at least one lamp;
light trap means formed integrally with at least portions of the door frame for minimizing light leakage from the lighting fixture through spaces disposed between the door frame and the housing assembly; and
,means integral with the bar elements for joining said bar elements together, the joining means comprising a first tab formed at each end of a first pair of the bar elements, each tab surmounting a slot formed along the juncture between the tab and the bar elements, the other pair of parallel bar elements having a second tab formed at each end thereof, the second tabs being dimensioned to be received one each through the slots at the ends of the first pair of the bar elements, the first and second tabs being bent back over to connect the bar elements together. - View Dependent Claims (37, 38, 40, 41, 43, 44, 45, 46)
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47. A lighting fixture having at least one lamp carried within a housing assembly, comprising:
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a door frame mounted for movement relative to the housing assembly to facilitate access to the interior of the lighting fixture, wherein the door frame is formed of elongated bar elements joined together at end portions thereof;
a lighting panel carried by the door frame and disposed in operative relation to the at least one lamp; and
,means integral with the bar elements for joining said bar elements together, the joining means comprising a first tab formed at each end of a first pair of the bar elements, each tab surmounting a slot formed along the juncture between the tab and the bar elements, the other pair of parallel bar elements having a second tab formed at each end thereof, the second tab being dimensioned to be received one each through the slots at the ends of the first pair of the bar elements, the first and second tabs being bent back over to connect the bar elements together. - View Dependent Claims (48, 49, 50, 51, 52, 53, 54, 55, 56, 57)
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58. A lighting fixture having at least one lamp carried within a housing assembly, comprising:
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a door frame mounted for movement relative to the housing assembly to facilitate access to the interior of the lighting fixture;
a lighting panel carried by the door frame and disposed in operative relation to the at least one lamp; and
,means carried by the door frame and cooperating with slots formed in the housing assembly for latching the door frame to the housing assembly, the latching means comprising at least one spring-like body element receivable within one of the slots and a manually manipulable plate element joined the body element and extending externally of the lighting fixture at a locus of the door frame, manipulation of the plate element causing disengagement of the body element carried by the door frame from the slot formed in the housing assembly, thereby to release the door frame from the housing assembly on at least one side of the door frame. - View Dependent Claims (59, 60, 61, 62, 63, 64, 65, 66, 67, 68)
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69. A lighting fixture having at least one lamp carried within a housing assembly, comprising:
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a door frame mounted for movement relative to the housing assembly to facilitate access to the interior of the lighting fixture;
a lighting panel carried by the door frame and disposed in operative relation to the at least one lamp; and
,means carried by the door frame and cooperating with slots formed in the housing assembly for hinging the door frame to the housing assembly, the hinging means comprising a body element extending from connection to the door frame, the body element having a predetermined width and an elongated tab terminating The body element and having a length greater than the width of the body element, the slot having an upper portion formed of dimensions capable of receiving the elongated tab thereinto an a lower portion having a width less than the length of the tab and being slightly greater than the width of the body element, the body element being fitted into the lower portion of the slot after insertion of the tab through the upper portion of the slot, the tab being of a length which is too great to fit through the lower portion of the slot, thereby mounting the hinge means within the slot for movement of the door frame about an edge thereof joined to the housing assembly by said hinge means. - View Dependent Claims (70, 71, 72, 73, 74, 75, 76, 77, 78, 79)
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Specification