Multiple damper assembly for reach-in cases of the air defrost t

Details Multiple damper assembly for reach-in cases of the air defrost t Multiple damper assembly for reach-in cases of the air defrost t

1981-12-24

1983-07-19

Tapolcai, William E.

Refrigeration

Display type

With air controlling or directing means

62282, A47F 304

Patent

active

043936644

ABSTRACT:
A damper system, for a reach-in refrigerated display case of the air-defrosted type utilizes a single gear-reduction, reversible motor to operate between open and closed positions a multiplicity of dampers, all of which must be operated simultaneously. A radial arm on the motor shaft has a pin-and-slot connection to one damper connected to a series of other dampers pivoted about a common axis for joint opening and closing thereof. Each of the connected dampers includes cam means acting upon tongues of a second series of dampers pivoted about a common axis parallel to the axis of the first damper series. When the dampers of the first series are actuated to open position, the cams individual to the dampers of that series act to cause corresponding dampers of the second series to open simultaneously therewith. In a similar fashion, all the dampers are closed simultaneously by reason of their interconnection and cam action. The disclosed invention has particular adaptability for incorporation in refrigerated display cases in which dampers control the inflow and exhaust of ambient air used in the described type of cases for defrost purposes.

REFERENCES:
patent: 3648482 (1972-03-01), Beckwith et al.
patent: 3850003 (1974-11-01), Beckwith et al.
patent: 3937033 (1976-02-01), Beckwith et al.
patent: 4072488 (1978-02-01), Johnston
patent: 4144720 (1979-03-01), Subera et al.
patent: 4245482 (1981-10-01), Abraham

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