LED lighting luminaire having heat dissipating canister housing

A luminaire for use as a recessed lighting fixture, the luminaire having a canister comprising:

• a. a cylindrical sidewall and a domed cover having an interior wall, the cylindrical sidewall enclosing an interior chamber and the domed cover enclosing the interior chamber under the domed cover, the domed cover including an opening in its top surface and a sealing cap removably affixed to the domed cover to enclose the opening, the sealing cap having a recessed interior surface which extends into the interior chamber under the domed cover;
• b. means for retaining a source of illumination within the canister;
• c. a heat sink comprised of a multiplicity of spaced apart lower air fins which are separated by air gaps, the multiplicity of lower air fins supported within the interior chamber of the canister and extending radially inwardly from the interior sidewall;
• and
• d. the heat sink causing air to circulate within the canister and through the air gaps separating the lower air fins to thereby dissipate heat generated from the source of illumination.

A luminaire for use as a recessed lighting fixture, the luminaire having a canister comprising:

• a. a cylindrical sidewall and a domed cover, the cylindrical sidewall enclosing an interior chamber and the domed cover enclosing the interior chamber under the domed cover, the domed cover including an opening in its top surface and a sealing cap removably affixed to the domed cover to enclose the opening, the sealing cap having a recessed interior surface which extends into the interior chamber under the domed cover;
• b. means for retaining a source of illumination within the canister;
• c. a heat sink comprised of a multiplicity of upper air fins separated by air gaps, the upper air fins extending interiorly from the interior wall of the domed cover;
• and
• d. the heat sinks causing air to circulate within the canister and through the air gaps separating the upper air fins to thereby dissipate heat generated from the source of illumination.

A luminaire for use as a recessed lighting fixture, the luminaire having a canister comprising:

• a. a cylindrical sidewall with an interior sidewall and a domed cover with an interior recessed surface, the cylindrical sidewall enclosing an interior chamber and the domed cover enclosing the interior chamber under the domed cover, the domed cover including an opening in its top surface and a sealing cap removably affixed to the domed cover to enclose the opening, the sealing cap having a recessed interior surface which extends into interior chamber under the domed cover;
• b. an interior horizontal separation plate having an upper surface and a lower surface extending across a portion of an interior chamber, an which divides the chamber into an upper interior air gap chamber and a lower interior air gap chamber, a source of illumination affixed to the lower surface of the interior horizontal separation wall;
• c. a first heat sink comprised of a multiplicity of spaced apart lower air fins which are separated by air gaps, the multiplicity of lower air fins supported within the interior chamber of the canister, some of the multiplicity of lower fins and extending radially inwardly from an interior surface of the interior sidewall to the horizontal separation wall, a multiplicity of interior vertical sidewalls affixed to the lower surface of the interior horizontal separation plate and affixed to some of the lower air fins, a lower air gap chamber formed by the lower surface of the interior horizontal separation plate, the multiplicity of interior vertical sidewalls, and some of the lower air fins;
• d. a second heat sink comprised of a multiplicity of upper air fins separated by air gaps, the upper air fins located above the interior horizontal separation plate and resting on the upper surface of the interior horizontal separation plate and extending radially inwardly from the interior sidewall to the upper surface of the interior horizontal separation plate, an upper interior air gap chamber formed by the upper surface of the interior horizontal separation plate, the interior surface of the domed cover and horizontal sidewall and upper air fins;
• the recessed interior surface of the sealing cap extending into the upper interior air gap chamber;
• and
• e. the second and first heat sinks causing air to circulate within the upper interior air gap chamber, the lower interior air gap chamber, and through the air gaps separating the upper air fins and the lower air fins to thereby dissipate heat generated from the source of illumination.

A luminaire for use as a recessed lighting fixture, the luminaire having a canister comprising:

• a. a cylindrical sidewall with an interior sidewall and a domed cover with an interior recessed surface, the cylindrical sidewall enclosing an interior chamber and the domed cover enclosing the interior chamber under the domed cover, the domed cover including an opening in its top surface and a sealing cap removably affixed to the domed cover to enclose the opening;
• b. an interior horizontal separation plate having an upper surface and a lower surface extending across a portion of the interior chamber, and which divides the interior chamber into an upper interior air gap chamber and a lower interior air gap chamber, a source of illumination affixed to the lower surface of the interior horizontal separation plate;
• c. an upper heat sink comprised of a multiplicity of upper air fins separated by air gaps, the upper air fins located above the interior horizontal separation plate and resting on the upper surface of the interior horizontal separation plate and extending radially inwardly from the interior sidewall to the upper surface of the interior horizontal separation plate, an upper interior air gap chamber formed by the upper surface of the interior horizontal separation plate, the interior surface of the domed cover and upper air fins;
• and
• d. the heat sink causing air to circulate within the upper air gap chamber, and through the air gaps separating the upper air fins to thereby dissipate heat generated from the source of illumination.

A luminaire for use as a recessed lighting fixture, the luminaire having a canister comprising:

• a. a cylindrical sidewall with an interior sidewall and a domed cover with an interior recessed surface, the cylindrical sidewall enclosing an interior chamber and the domed cover enclosing the interior chamber under the domed cover, the domed cover including an opening in its top surface and a sealing cap removably affixed to the domed cover to enclose the opening;
• b. an interior horizontal separation plate having an upper surface and a lower surface extending across a portion of the interior chamber, a source of illumination affixed to the lower surface of the interior horizontal separation plate;
• c. a lower heat sink comprised of a multiplicity of spaced apart lower air fins which are separated by air gaps, the multiplicity of lower air fins supported within the interior chamber of the canister and some of the multiplicity of lower air fins extending radially inwardly from the interior surface of the cylindrical sidewall to the horizontal separation plate, a multiplicity of interior vertical sidewalls affixed to the lower surface of the interior horizontal separation plate and affixed to some of the lower air fins, a lower air gap chamber formed by the lower surface of the interior horizontal separation plate, the multiplicity of interior vertical sidewalls, and some of the lower air fins;
• and
• d. the lower heat sink causing air to circulate within the lower air gap chamber, and through the air gaps separating the lower air fins to thereby dissipate heat generated from the source of illumination.