Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 7422159 | Thermostat valve unit In connection with a thermostat valve which, together with a housing cover member, constitutes a structural unit, it is provided that a cross arm member is secured on a housing cover by means of a snap-in connection and is provided with flanges extending into a fast... | 09/09/2008 |
| 7407113 | Products and process that act as a safety valve to prevent scalding A thermostatic valve incorporated within a plumbing system for regulating the flow of fluid. The thermostatic valve includes two valve assemblies operatively cooperating to preclude the flow of scalding water. The first valve assembly and second valve assembly respo... | 08/05/2008 |
| 7255286 | Temperature compensation valve A temperature compensation valve is hereby provided wherein the inner cavity of the valve comprises a puck, a metal piston (gas control device), and a spring. The spring serves to bias the piston towards the puck, and the puck expands and contracts proportionately i... | 08/14/2007 |
| 5967410 | Thermal relief valve A thermal relief valve to be mounted in a fluid flow line. The valve comprises a valve body and a valve actuator movable in a bore defined by a bore wall in the valve body from a sealing position in which the actuator sealingly engages a valve seat to blo... | 10/19/1999 |
| 5275334 | Thermally-actuated steam trap In order to open a valve member during the breakage of a temperature control element and to prevent the couterflow of fluid from an outlet side to an inlet side even when pressure at the outlet side becomes higher than that at the inlet side, there is pro... | 01/04/1994 |
| 4948041 | Thermostatic garden hose protection device A device to protect garden hoses and other fluid conduits from wear and bursting caused by pressure build-up due to heat generation particularly from the sun's rays. The device can be attached between the house spigot and hose or at the end of a hose betw... | 08/14/1990 |
| 4846219 | Pressure relief by pass control valve A pressure relief by-pass control valve in a system flowing fluid of changing temperature. The vale incorporates a signalling mechanism to indicate when differential pressures have put the valve in a by-passing mode, including an indicator button displace... | 07/11/1989 |
| 4711393 | Water temperature control device A water temperature control device wherein the relative inflows of hot and cold water into a mixing chamber and then to an outlet are controlled by a mercury filled temperature sensing element, the volume expansion or contraction of the mercury activating... | 12/08/1987 |
| 4570848 | Automatic bath water temperature control The device is a water temperature controller that has hot and cold water input and an output water temperature that is automatically kept at the temperature at which its hand settable control is set. It has a temperature sensitive element that drives a bellows... | 02/18/1986 |
| 4541448 | Freeze protection valve with metal to plastic fitting design The freeze protection valve includes a molded plastic valve housing (A) including a peripheral wall (10) which defines an elongated recess (12) therein. The valve housing includes a first seating region (18) surrounding the elongated recess open end, a dr... | 09/17/1985 |
| 4336903 | Control valve The control valve for keeping a constant temperature or viscosity of a pressure medium in a hydraulic consumer circuit includes a main control valve provided with a control slider and a preliminary control valve in which a temperature sensitive control el... | 06/29/1982 |
| 4335688 | Coupling adapter for fluid cooling and filtering A coupling adapter is disclosed for coupling a remotely-located fluid circulation device and a fluid filter to the fluid reservoir of an engine, transmission unit or other hydraulic system in place of a standard spin-on fluid filter. The adapter consists ... | 06/22/1982 |
| 4303197 | Control valve The control valve for keeping constant viscosity and temperature of a pressure medium in a hydraulic circuit includes a preliminary control valve which supports a temperature sensitive control element and adjustable throttling means including a throttling... | 12/01/1981 |
| 4295605 | Steam traps A thermostatic steam trap having a balanced pressure thermostatic element (2,2A,2B) operated by volatile fluid (15) is disclosed in which an internal void (10) of the element is open to steam/condensate within the trap, and in which the volatile fluid fil... | 10/20/1981 |
