Temperature control system

Patent 4646964 Issued on March 3, 1987. Estimated Expiration Date:

March 3, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

2570781

3841394

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Patent #: 4068799
Issued on: 01/17/1978
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Inventors

Assignee

Parker Electronics, Inc.

Application

No. 06/434259 filed on 10/14/1982

US Classes:

236/49.3, Electrically actuated165/11.1, WITH ALARM, INDICATOR, SIGNAL, REGISTER, RECORDER, TEST OR INSPECTION MEANS236/1B, Zone control for heating and cooling medium236/94With indicator or alarm

Examiners

Primary: Wayner, William E.

Attorney, Agent or Firm

Yeager; Arthur G.

International Classes

F24F 11/02 (20060101)
F24F 11/00 (20060101)
G05D 16/20 (20060101)

Abstract

A temperature control system used in association with a heating and cooling system supplying warm or cool air to a duct system for maintaining accurate temperature in a zone of multiple zones utilizing a microcomputer based thermostat for modulating a damper assembly in the duct system feeding the zone, thereby controlling the volume of air flow in the duct system to the zone to match the load in each zone. The thermostat has a digital readout display thereon indicating the temperature to be maintained in the zone and which can selectively display the duct temperature of air and/or the zone temperature of the air. The thermostat controls a damper assembly which includes a stepper motor for pivoting the damper blade between open and closed positions with the duct temperature sensor located before the damper blade in the duct. Calibration to provide setting of the zone temperature to conform with an accurate thermometer is provided in the thermostat, as well as selectable stop positions for the damper blade.