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| Number | Title | Issue Date |
| 6988672 | Valves A temperature sensitive valve (10) includes a body (11) affording a passageway (12) for fluid, a valve member (15) which is moveable relative to the body (11) between first and second positions to control the flow of fluid through ... | 01/24/2006 |
| 4605162 | Emergency ventilator opener for livestock houses A ventilator opener for a livestock house having an electrically powered fan for ventilation utilizes a tubular electrical heater, connected to the same power source as the fan, to heat an expandable bi-metallic latch finger which thereby engages the inne... | 08/12/1986 |
| 4479483 | Safety stovepipe damper assembly A safety stovepipe damper assembly designed for use with a conventional type stovepipe and damper as used on coal, wood, or waste burning stoves. Provisions are made for presetting the damper to a specific low fire or closed position. A latch is also prov... | 10/30/1984 |
| 4438777 | Freeze protection valve with improved resetting capability A freeze protection valve can be reset under cold ambient conditions without the need for artificial heating of the valve's temperature sensor. An auxiliary latch is used to hold the valve element closed. The auxiliary latch is automatically released as t... | 03/27/1984 |
| 4025041 | Safety valve A heating system employs a thermostat fuel control device and a safety fuel control device, such as a safety valve retained against a closing bias wherein a bulb contains an expandable fluid for releasing the safety valve, responding to an overheat condit... | 05/24/1977 |
