US3731056A — Supplemental heater unit for air conditioner of t…

Claim 1

Independent Claim 163 words

In an air conditioner of the type having a cabinet and first and second blowers operable simultaneously with or separately from each other and whose inlets are open to each other within the cabinet, such blowers having separate outlets, the improvement comprising a heater unit including a walled air casing having first and second air inlets and means thereat to connect to such first and second blower outlets, respectively, air casing outlet means, and heating means within the air casing interposed between said first air inlet and the outlet means, the heater unit being characterized in having damper means inwardly adjacent to said second air inlet, to close said second air inlet responsive to suction external to said second air inlet created by said first blower, whereby on powering such first air conditioner blower while the second is unpowered, a pressure drop within such air conditioner cabinet will close said damper means automatically and prevent re-circulation to the cabinet of such air conditioner.

Claim 2

Dependent Claim 163 words

In an air conditioner of the type having a cabinet and first and second blowers operable simultaneously with or separately from each other and whose inlets are open to each other within the cabinet, such blowers having separate outlets, the improvement comprising a heater unit including a walled air casing having first and second air inlets and means thereat to connect to such first and second blower outlets, respectively, air casing outlet means, and heating means within the air casing interposed between said first air inlet and the outlet means, the heater unit being characterized in having damper means inwardly adjacent to said second air inlet, to close said second air inlet responsive to suction external to said second air inlet created by said first blower, whereby on powering such first air conditioner blower while the second is unpowered, a pressure drop within such air conditioner cabinet will close said damper means automatically and prevent re-circulation to the cabinet of such air conditioner.

Claim 3

Dependent Claim 43 words

The improvement as defined in claim 1, wherein the heating means comprises an electrical resistance heater, together with electrical switching and circuitry means to energize the said resistance heater and simultaneously to operate such first blower only if the air conditioner, without cooling.

Claim 4

Dependent Claim 53 words

The heater unit as defined in claim 1, wherein the said second air inlet is in a vertical wall of the air casing, and the damper means comprises a flat damper plate closable against said inlet and supported by hinge means thereabove and closely adjacent to the inner surface of said vertical wall.

Claim 5

Dependent Claim 66 words

The heating unit as defined in claim 1, wherein said air inlets are positioned side by side in a vertical wall of the air casing, and the damper means is a plate having upper edge hinge support means, the plate being of such width and so positioned that when closed against said second air inlet it extends across a minor portion of said first air inlet.

Claim 6

Dependent Claim 160 words

For use with an air conditioner of the type having a cabinet and first and second blowers operable simultaneously with or separately from each other and whose inlets are open to each other within the cabinet, such blowers having separate side-by-side outlets, a supplemental heater unit comprising a walled air casing having a vertical wall penetrated by side-by-side first and second air inlets, air casing outlet means, and heating means within the air casing interposed between said first air inlet and the outlet means, the heater unit being characterized in having damper means inwardly adjacent to said second air inlet, to close said second air inlet responsive to suction external to said second air inlet created by said first blower, the damper means being a plate having upper edge hinge support means, the plate being of such width and so positioned that when closed against said second air inlet it extends across a minor portion of said first air inlet.

Claim 7

Dependent Claim 160 words

For use with an air conditioner of the type having a cabinet and first and second blowers operable simultaneously with or separately from each other and whose inlets are open to each other within the cabinet, such blowers having separate side-by-side outlets, a supplemental heater unit comprising a walled air casing having a vertical wall penetrated by side-by-side first and second air inlets, air casing outlet means, and heating means within the air casing interposed between said first air inlet and the outlet means, the heater unit being characterized in having damper means inwardly adjacent to said second air inlet, to close said second air inlet responsive to suction external to said second air inlet created by said first blower, the damper means being a plate having upper edge hinge support means, the plate being of such width and so positioned that when closed against said second air inlet it extends across a minor portion of said first air inlet.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1976-04-30	1976-10-30	1977-05-01	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1980-04-30	1980-10-30	1981-05-01	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1984-04-30	1984-10-30	1985-05-01	$7700.00	Window Closed / Lapsed

Supplemental heater unit for air conditioner of the dual blower type

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