Ridge vent with shape-memory actuated heat valve

Details Ridge vent with shape-memory actuated heat valve Ridge vent with shape-memory actuated heat valve

1987-10-02

1989-07-18

Joyce, Harold

Automatic temperature and humidity regulation

Ventilator type

Electrically actuated

98 4218, 98 422, 236101D, F24F 702

Patent

active

048486531

ABSTRACT:
An improved actuator for the damper of a ridge vent. The actuator includes coil springs constructed from a shape-memory alloy. The springs are contracted below a selected temperature at which the damper is to open, and the contracted springs maintain the damper closed on its seat. Above the transformation temperature of the springs, they expand and raise the damper off of its seat to an open position for venting of air through the ridge vent.

REFERENCES:
patent: 2266261 (1941-12-01), Pfeifer, Jr.
patent: 4123001 (1978-10-01), Kult
patent: 4523605 (1985-06-01), Ohkata
patent: 4597324 (1986-07-01), Spilde
Scientific American, Nov., 1979, pp. 74-82, re Shape Memory Alloys.

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