U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Fireplace air circulation and draft control

Patent 4147153 Issued on April 3, 1979. Estimated Expiration Date: Icon_subject August 26, 1997. 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.

Patent References

1740996

2920549

3250205

3264972

Inventor

Assignee

Application

No. 05/828107 filed on 08/26/1977

US Classes:

126/521, With air pump126/502, Condition responsive control126/531Hollow side walls in heat exchanger

Examiners

Primary: Wayner, William E.
Assistant: Tapolcai, William E.

Attorney, Agent or Firm

International Classes

F24B 1/00 (20060101)
F24C 1/14 (20060101)
F24C 1/00 (20060101)
F24B 1/188 (20060101)
F24F 5/00 (20060101)
F24H 3/02 (20060101)
F24H 3/06 (20060101)

Abstract

A free-standing unit for heating air in a U-shaped channel surrounding a fire box having a pair of spaced vertical vents for directing the heated forced air to converge in front of the fire box opening to limit air flow towards said openings. Mesh in the vertical vents directs the forced air downward to be combined with the hot forced air from a bottom horizontal vent. A baffle plate depending from the top of the fire-box adjacent the flue port and an opening along the top of the doors ignite the gases adjacent the top and directs some gases back into the fire. By forcing heated air at a low level and drawing cool air from a high level, the air being heated is of a uniform temperature. A hood extending along the top edge of the fire box opening diverts exiting gases back into the fire box. A thermostatically controlled blower creates the forced air and cools the fire box walls.

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