Light fixture with improved waveguide control
AssigneeABU IP Holding LLC
InventorsJohn Sakmar, Luke J. Siefker, Adam Miller, Jeff C. Carpenter
Life of this patent
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Abstract
A light fixture includes a housing that defines a housing chamber having a housing opening. The light fixture is configured to emit light through the housing opening. The light fixture also includes a waveguide supported within the housing chamber and over the housing opening. The light fixture may include a backing plate supported within the housing chamber and biasing the waveguide towards the housing opening. The light fixture may include a transition cover with a cover body extending from a first portion of the waveguide to the housing opening and a light dam extending from the cover body towards a second portion of the waveguide.
Claims19
A light fixture comprising:
- a housing defining a housing chamber having a housing opening, wherein the light fixture is configured to emit light through the housing opening;
- a waveguide supported within the housing chamber and over the housing opening, the waveguide comprising a perimeter edge;
- a backing plate supported within the housing chamber and biasing the waveguide towards the housing opening;
- and
- a transition cover comprising:
- a cover body extending from a first portion of the waveguide to the housing opening;
- and
- a light dam extending from the cover body towards a second portion of the waveguide, wherein the second portion of the waveguide is closer to the perimeter edge than the first portion of the waveguide.
A light fixture comprising:
- a housing defining a housing chamber having a housing opening, wherein the light fixture is configured to emit light through the housing opening;
- a waveguide supported within the housing chamber and over the housing opening;
- a transition cover supported on the housing and comprising:
- a cover body comprising an upper end contacting the waveguide and a lower end opposite from the upper end and adjacent to the housing opening;
- and
- a light dam extending outwardly from the cover body towards the waveguide;
- and
- a backing plate within the housing chamber and such that the waveguide is between the transition cover and the backing plate, wherein the backing plate comprises a plate body extending in a plane and comprising:
- a first surface;
- a second surface;
- a compression feature offset a first distance from the plane in a first direction, wherein the compression feature comprises a compression feature transverse dimension extending in a direction of the plane that is less than a transverse dimension of the plate body;
- and
- a deflection limiter offset a second distance from the plane in the first direction, wherein the deflection limiter comprises a deflection limiter transverse dimension extending in the direction of the plane that is less than the transverse dimension of the plate body.
A light fixture comprising:
- a housing defining a housing chamber having a housing opening, wherein the light fixture is configured to emit light through the housing opening;
- a waveguide supported within the housing chamber and over the housing opening;
- and
- a backing plate supported within the housing chamber such that the waveguide is between the housing opening and the backing plate, wherein the backing plate comprises a plate body extending in a plane and comprising:
- a compression feature offset a first distance from the plane in a first direction, wherein the compression feature comprises a compression feature transverse dimension extending in a direction of the plane that is less than a transverse dimension of the plate body;
- and
- a deflection limiter offset a second distance from the plane in the first direction, wherein the deflection limiter comprises a deflection limiter transverse dimension extending in the direction of the plane that is less than the transverse dimension of the plate body,
- wherein the compression feature biases the waveguide towards the housing opening.
Dependencies are inferred from the claim text.