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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 8020782 | Transmission thermostat device A transmission thermostat device includes a body having first and second input ports and first and second output ports. A first fluid path extends between the first input port and the first output port. A second fluid path extends between the second input port and t... | 09/20/2011 |
| 7913928 | Adaptive structures, systems incorporating same and related methods Adaptive structures, systems incorporating such adaptive structures and related methods are disclosed. In one embodiment, an adaptive structure is provided that includes a first structure and at least one microstructure associated with the first structure. The at le... | 03/29/2011 |
| 6860432 | Overtemperature safety cutoff device A fluid flow shutoff device that eliminates exposure to scalding hot water. The device includes a housing with a first and second opening for allowing fluid flow from the first to the second opening and a bimetallic element supported within the housing. When tempera... | 03/01/2005 |
| 6536676 | Valves A valve assembly comprising a housing having an inlet and space therefrom an outlet, means located in the housing for controlling the flow of fluid between the inlet and the outlet, said means including a main valve movable between a first relatively clos... | 03/25/2003 |
| 6431458 | Temperature actuated flow restrictor A thermostat valve 10 is provided for controlling gas flow to an infrared catalytic heater 26. The thermostat valve includes a thermally responsive snap member 50, 64, 150 positioned within a housing central flow path and moveable with respect to the hous... | 08/13/2002 |
| 6039262 | Passive bimetallic actuator for heat transfer The invention is a bimetallic actuator for heat-transfer applications where the source of energy is provided by a temperature difference between two eservoirs or the temperature change of the ambient. The actuator requires no external source of power for ... | 03/21/2000 |
| 6003778 | Automotive oil level control apparatus An oil level control valve (10) has a molded base (12) having an oil receiving aperture (12d) formed through a bottom wall (12e) with a circumscribing generally rectangular cover plate seat in which a cover plate (14) is removably received. A thermostatic... | 12/21/1999 |
| 5909843 | Steam radiator exhaust valve An exhaust valve for threading into a street elbow threaded into an exhaust port of a conventional steam radiator that includes a base portion, a cap portion supported by the base portion, and a bimetallic arm contained in the cap portion. The base portio... | 06/08/1999 |
| 5553636 | Watering through fill valve control For use with a watering trough fill control valve having float structure located to rise as water is filled into the trough via the valve, and to effect closing of the valve when the trough is filled to predetermined extent, the float structure located to... | 09/10/1996 |
| 5209399 | Automotive oil level control valve apparatus A fluid level control valve has a base with a precisely controlled aperture formed therein which mounts on a transmission oil reservoir. A cover is pivotably disposed over the aperture and is biased by a thermostatic element in a direction tending to clos... | 05/11/1993 |
| 5195678 | Automotive oil level control apparatus A fluid level control valve has a base with an aperture formed therethrough. A cover is movably disposed over the aperture and is biased by a thermostatic element in a direction tending to close the aperture. The thermostatic element is a generally U-shap... | 03/23/1993 |
| 4998878 | Fuel control system for a burner A burner assembly includes a burner housing having a combustion chamber defined therein and a fuel injection nozzle secured to the burner housing and communicating with the combustion chamber. A fuel control device is provided for controlling the amount o... | 03/12/1991 |
| 4921165 | Automotive oil level control valve apparatus A fluid level control valve has a base with an aperture formed therein. A cover is slidingly disposed over the aperture and is biased by a thermostatic element in a direction tending to close the aperture. In one embodiment the thermostatic element is an ... | 05/01/1990 |
| 4888956 | Cryogenic apparatus and cryogenic methods Cryogenic apparatus and methods are disclosed which enable a substance to be frozen at a rapid rate thereby promoting the formation of a multitude of small ice crystals in the substance rather than a smaller number of large ice crystals. The method compri... | 12/26/1989 |
| 4865250 | Automotive oil level control valve apparatus A fluid level control valve has a base with an aperture formed therein. A cover is slidingly disposed over the aperture and is biased by a thermostatic element in a direction tending to close the aperture. The thermostatic element is an elongated strip ha... | 09/12/1989 |
| 4838481 | Draft control arrangement for venting of combustion apparatus In a bimetal-actuated damper a loop-shaped bimetal element engages a damper element. One end of the loop is fixedly fastened while the other end of the loop is movably connected with the damper element. This improves temperature-dependent response and sen... | 06/13/1989 |
| 4828169 | Adjustable air valve An adjustable air valve for steam radiators, comprising a cylindrical valve body of seamless brass having a predetermined outer diameter; an upper circular disc cap closing off the top end of said valve body; a lower circular disc cap closing off the lowe... | 05/09/1989 |
| 4809947 | Flow regulation valve The regulating valve has a heat responsive extension element which is prestressed and which extends crosswise of the gas line. The extension element biases the valve body into sealing engagement with the valve seat to maintain the valve in a normally clos... | 03/07/1989 |
| 4770823 | Choke valve mechanism for carburetor A diaphragm carburetor for internal combustion engines with a special choke valve to regulate the fuel and air mixture especially during hot restart of the engine. The disk choke valve has openings and a temperature responsive alloy member is positioned t... | 09/13/1988 |
| 4651968 | Valve construction and method of making the same A valve construction and method of making the same are provided, the valve construction comprising a housing, a valve seat carried by the housing, a movable lever carried by the housing and having an opening passing through opposed sides thereof, a valve ... | 03/24/1987 |
| 4646965 | Thermostatic steam trap A thermostatic trap for a heating system having a feed pipe connected to a source of steam and a discharge pipe for discharge of condensate. Included in the trap is a housing defining a volume and comprising a bowl shaped body, a removable cover therefor,... | 03/03/1987 |
| 4557419 | Temperature-actuated flow control device A temperature-actuated flow control device has a fluid inlet connected to an exhaust line with a control chamber located therebetween. The control chamber has a free-floating bi-metallic circular element which is flexed in response to temperature changes ... | 12/10/1985 |
| 4502627 | Fluid flow control apparatus A fluid flow control for an automotive automatic transmission system is shown in which a flag, attached to a free end of a thermostat element is caused to slide over a control orifice to provide a minimum fluid flow at a high reference temperature of the ... | 03/05/1985 |
| 4497437 | Control device with a bimetallic element unilaterally fastened in a housing A control device is proposed having a bimetallic element, one end of which is pressed into a holding groove provided on a metallic holder disposed in a housing. Fixed placement of bimetallic element over the lifetime of the control device is thus ensured.... | 02/05/1985 |
| 4494692 | Steam trap Steam trap structure including a bi-metal strip for actuating valve means to control passage of steam through the steam trap in accordance with the temperature within the steam trap. The bi-metal strip may be straight or may have an arcuate portion on one... | 01/22/1985 |
| 4456169 | Electro-mechanical steady state thermostat A steady state thermostat is disclosed which employs a magnetic flux coupling technique to obtain a greater stability in its operation, resulting in a significant reduction in fuel costs. The thermostat includes a temperature sensor operated arm and a tem... | 06/26/1984 |
| 4412650 | Snap acting heat motor operated gas valve A snap acting heat motor operated gas valve having a valve member carried by a spring blade that is secured to one end of an electrically heated control bimetal strip. Magnetic means associated with the spring blade normally bias the valve member to a clo... | 11/01/1983 |
| 4331292 | Instant hot water supply system An instant hot water supply system comprising a connection between the hot water and cold water lines incorporating a thermostatic control so that as the water in the hot water line cools off, cold water is allowed to escape and hot water is drawn from th... | 05/25/1982 |
| 4272013 | Vent control arrangement for combustion apparatus Thermally actuated damper for vents or flues of gas-fired heating appliances having bimetallic slotted blades each of which performs both the sensing and the closing function. In the present invention the slots, which are necessary to enable the bimetal b... | 06/09/1981 |
| 4262844 | Control valve A temperature-responsive valve for controlling the flow of fluid substantially without being affected by the pressure of or the turbulence generated by said fluid, comprises a housing having a chamber therein, an inlet port communicating with said outlet ... | 04/21/1981 |
| 4249694 | Draft control arrangement A draft control arrangement for use with a gas-fired heating apparatus. The flow of waste gas through a draft hood of the apparatus is throttled by bimetal element means which responds to temperature change for reducing or enlarging the throttle area. Con... | 02/10/1981 |
| 4245783 | Condensation steam trap comprising a plate-like bimetal body having a curved stape The condensation steam trap device includes a housing having a passage through the wall, which provides for fluid flow between the interior and exterior of the housing. The passage has a valve seat and carries a valve for engagement with the seat. A valve... | 01/20/1981 |
| 4241872 | Pneumatically operated thermostat construction and method of making the same A thermostat construction having a valve unit for directing a pneumatic signal to a pneumatically operated control device in relation to the force differential between the temperature sensed by the temperature sensing unit thereof and the temperature sett... | 12/30/1980 |
| 4235219 | Controlling the damping of flues Control method and apparatus, particularly for the damping of flues. A control device employing a latch mechanism operated by a bimetallic strip is used, for example, to operate a damper through a linkage. After being engaged, the latch is set automatical... | 11/25/1980 |
| 4191326 | Draft control arrangement for combustion apparatus A draft control arrangement having bimetallic damper elements mounted in a draft hood and adapted to change shape in response to temperature change to open and close the flow passage for vent gases from a combustion apparatus. The damper elements are posi... | 03/04/1980 |
| 4175678 | Explosion proof device for a pressure accumulator having a valve portion An explosion proof device for a pressure accumulator, such as an aerosol container, having a valve portion comprising an action segment fixed in the vicinity of the valve portion, a part of such action segment being set in the state wherein engagement wit... | 11/27/1979 |
| 4159078 | Draft control arrangement for combustion apparatus A draft control arrangement having bimetallic damper elements mounted in a draft hood and adapted to change shape in response to temperature change to open and close the flow passage for vent gases from a combustion apparatus. The damper elements are posi... | 06/26/1979 |
| 4156518 | Electric vacuum valve An electric vacuum valve comprising a body including a chamber having a first passage adapted to be connected to a source of vacuum, a valve seat in the chamber, a bi-metallic disc associated with the valve seat and operable to close the first passage and... | 05/29/1979 |
| 4144998 | Double throw thermal valve An improved thermally actuated valve assembly having a double throw feature comprises three ports in which two passages are provided among these three ports; one passage connecting ports one and two and the other passage connecting ports two and three. At... | 03/20/1979 |
| 4143812 | Thermosensitive safety valve There is disclosed an apparatus and method for a thermosensitive safety valve to restrict a supply of fluid in a fluid delivery system when the temperature of the fluid reaches a predetermined temperature. A bimetal reed is utilized in which its unattache... | 03/13/1979 |
