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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 |
| 7300034 | Thermal compensatory valve A compensation device for a valve compensates for expansion of a valve stem and/or inertial effects during operation of the valve. The compensation device is preferably integrally provided with the valve. The compensation device includes a first plate rigidly connec... | 11/27/2007 |
| 7156371 | Device for opening or closing an opening, in particular a bottom opening of a material bunker for a blast furnace A device for closing or opening an opening, in particular a filling or bottom opening (11) of a material bunker (12) arranged above the furnace throat of a blast furnace, including a tilting disk (10) connectable to a drive. The tilting disk ( | 01/02/2007 |
| 7048254 | Low-leakage valve apparatus A low-leakage valve apparatus which reduces fugitive emissions from valves to the ambient atmosphere. A secondary packing chamber or gland is installed on an existing valve to intercept leakage past the valve's original primary packing gland, which otherwise would e... | 05/23/2006 |
| 6945584 | Tailgate advertising apparatus and methods A tailgate advertising assembly includes a tailgate and a billboard. The tailgate is for attachment to a rear of a vehicle so as to be moved between a closed position and an open position as for loading and unloading, and has an upper extremity, a lower extremity, o... | 09/20/2005 |
| 6681797 | Pressure transducer A pressure transducer for the production of a controlled under or overpressure comprises a valve to which compressed air can be applied, a motor for adjusting the position of the valve block, a sensor for measuring the pressure to be controlled and an ele... | 01/27/2004 |
| 6595240 | Creep resistant valve A valve made principally of plastic has a creep compensating features providing consistent engagement between valve members and their respective valve seats, minimizing creep, and compensating for any creep that does occur. The features compensate for com... | 07/22/2003 |
| 6371442 | Fluid flow regulator A cylindrical main body is provided with an inlet port and an outlet port. The outlet port is formed on a front end portion of the main body. A carriage is accommodated inside the cylindrical main body slidably in an axial direction of the main body. A sp... | 04/16/2002 |
| 6192931 | Damper blade control A device for controlling the movement of a damper mounted in a housing includes a shaft rotatably secured to the damper for pivoting the damper between an open position and a closed position. A lever arm is mounted on the shaft for rotation therewith and ... | 02/27/2001 |
| 5797585 | Control device for a pivoting valve flap for a heating and/or air conditioning installation in a motor vehicle A flap valve for a heating and/or air conditioning installation for a motor vehicle has a valve flap which is operated by a control device between an open position and a closed position. The control device comprises a driving lever which is coupled, throu... | 08/25/1998 |
| 5560591 | Leveling valve for air springs A leveling valve for controlling the amount of air within an air spring for maintaining a constant level of a vehicle chassis or frame relative to its axles. The valve includes several features including a novel actuating mechanism for actuating the valve... | 10/01/1996 |
| 5503045 | Drive assembly for controlling a powered device A drive assembly for a valve includes a motor, a transmission which is coupled to the motor and the valve, and a manual drive unit having a shaft which is arranged to be driven by a handwheel. The shaft has a small amount of axial play and is provided wit... | 04/02/1996 |
| 5496100 | Pressure limited solenoid valve for a brake system A solenoid valve with pressure limitation for motor vehicle brake systems with slip control. The solenoid valve has a seat valve with the valve seat, valve element and restoring spring, which holds the seat valve in an open position. The valve element is ... | 03/05/1996 |
| 5303734 | Pressure regulator A pressure regulator includes a housing having a chamber that receives a pressure responsive member. The pressure responsive member includes an internal charge that allows a movable portion of the regulator to react in response to pressure differentials. ... | 04/19/1994 |
| 5161579 | Leveling valve for air springs A leveling valve for controlling the amount of air within an air spring for maintaining a constant level of a vehicle chassis or frame relative to its axles. The valve includes an elongated body in which a uniquely constructed actuating mechanism is locat... | 11/10/1992 |
| 4977641 | Lever handle assembly for sanitary fixtures A lever handle assembly for a sanitary water fixture which includes a spindle for actuating the fixture. The lever handle assembly comprises the handle adapter, a handle sleeve having a handle lever, and a friction coupling. The handle adapter nonrotatabl... | 12/18/1990 |
| 4893649 | Constant flow rate controller valve A constant flow rate controller valve includes a piston spring biased towards the top of the valve. Fluid or gas flowing into the valve increases the pressure in the chamber above the piston, forcing the piston toward a valve seat. A pin type valve stem i... | 01/16/1990 |
| 4836497 | Adjustable valve linkage A valve actuator mechanism for supplying a selectively adjustable close-off force to an associated valve. The mechanism comprises a means for urging the valve plunger into engagement with the valve seat with a predetermined initial force and resistive mea... | 06/06/1989 |
| 4783859 | Aircraft toilet flush valve A flush valve is provided for opening and closing a drain connecting a toilet bowl to a waste holding tank maintained at a partial vacuum. The flush valve is located external to the drain and comprises a pinch or nip mechanism surrounding a flexible secti... | 11/15/1988 |
| 4722507 | Piston sealing ring apparatus A sealing ring device is provided for a fluid valve having a piston (2) reciprocating within a cylinder (1), wherein the piston (2) includes a valve cone (2c) adapted to contact a valve seat (11). In order to seal the inner space of the cylinder (1) locat... | 02/02/1988 |
| 4696321 | Air release and vacuum breaker valve system A combined air release and vacuum breaker valve for pipelines has a ball float that acts directly upon both the vacuum breaker and air release valves which are concentric with one another and axially aligned with the ball float. To avoid adverse effects o... | 09/29/1987 |
| 4648998 | Charge forming apparatus A charge forming apparatus or carburetor having a mixture passage and a throttle valve arranged therewithin. A fuel pressure control mechanism comprises a chamber from which controlled fuel is fed to the mixture passage. A flexible diaphragm defines one o... | 03/10/1987 |
| 4612954 | Pedal operated flush valve A pedal operated flushing system includes a hydraulically-actuated flush valve connected to a hydraulic fluid source by a supply line having a control valve therein. The control valve is mounted on a pocket portion of a bracket, the pocket forming an encl... | 09/23/1986 |
| 4518116 | Automatic damper operator A motorized, automatic mechanism for installation in an air register damper housing attachable to damper blades for the purpose of converting said blades from a manual mode of operation to an electrically controlled operation through motor interlock with ... | 05/21/1985 |
| 4450867 | Diverter valve and actuator assembly A diverter valve and actuator assembly for diverting flow of a fluid from one path to another under the control of a power driven actuator, including a valve body having a chamber therein with an inlet port and two outlet ports, each outlet port having a ... | 05/29/1984 |
| 4328947 | Pendulum gate valve A pendulum gate valve with a pressure tight housing and inlet and outlet openings arranged on opposite sides of the housing. The drive rod for the pendulum frame is guided throughout its total path by a joint connected to the pendulum frame which can swiv... | 05/11/1982 |
| 4309022 | Poppet valve actuator apparatus A poppet valve actuating apparatus includes an actuator for driving a valve poppet closed with substantial but momentary force to effect tight valve shutoff. After driving the poppet closed with a momentarily-applied relatively high-value force, the actua... | 01/05/1982 |
| 4245660 | Manual override for short stroke valve A dual valve actuator mechanism for a fire extinguisher bottle in a milit vehicle. The mechanism includes an electrical trigger system for operating the valve automatically in response to energization of an electronic optical fire sensor; alternately the... | 01/20/1981 |
| 4202583 | Brake control apparatus for railway cars A brake control apparatus for railway cars having sprung and unsprung portions is interposed between a brake pressure supply line and a brake cylinder line. A first chamber is connected to the brake pressure supply line and a second chamber is connected t... | 05/13/1980 |
| 4192341 | Drain trap valve mechanism A float actuated valve mechanism for automatically removing a predetermined amount of accumulated liquid condensate from a sump area of a gas pressurized drain trap or the like so as to regulate the level of liquid in such a sump area. A four-bar linkage ... | 03/11/1980 |
| 4190198 | Oil cooler bypass valve actuating means A valve actuating mechanism for an oil cooler bypass valve of the type in which a thermally responsive element expands to urge a valve member against a valve seat and thereby cause oil to flow through an oil cooler. A valve member is utilized which is mov... | 02/26/1980 |
| 4176687 | Hollow spool valve A high capacity direct acting three-way bistable power operated valve is connected to control operation of an hydraulically operated magazine sprinkler control valve. The three-way bistable valve controls application of high pressure sea water and include... | 12/04/1979 |
| 4172464 | Vibration resistant flapper and nozzle A pneumatic control instrument includes a nozzle-flapper system having improved dynamic response characteristics under vibrational conditions. A light-mass, compliant flapper having a high natural frequency covers the nozzle and serves to cushion the impa... | 10/30/1979 |
| 4149576 | Apparatus for loading compressible fluids into cartridges A system for loading a predetermined quantity of a compressible fluid into tubular cartridges or the like is provided which includes filling apparatus having filler tubes with ball valve means adjacent the outlet thereof, the outlets comprising flow const... | 04/17/1979 |
| 4145026 | Valve with self-actuating fluid seal A valve having a body with a valve seat and valve element and actuating means for moving the valve element toward and away from the valve seat with stop means in the body for stopping the movement of the valve element when the element is positioned agains... | 03/20/1979 |
| 4080990 | Six-way deviator valve for liquids A six-way deviator valve for liquids, of the type comprising two three-way valves in the same housing separated by a dividing baffle, each of the three-way valves possessing one permanently open nozzle for connection to a main pipe, and two internally clo... | 03/28/1978 |
| 4073465 | Butterfly valve There is disclosed a butterfly-type valve cooperable with a valve seat element formed of an elastomeric material, wherein this element also forms a seal between two identical housing halves. There is also disclosed an improved method of making such a valv... | 02/14/1978 |
| 4054260 | Device for controlling the flow of fluids, particularly corrosive and polluting fluids The invention relates to a mechanical device for the cut-off of fluid, particularly suitable for corrosive and polluting fluids, comprising an annular sealing member of packing displaceable towards and against the seal seating by means of a series of scre... | 10/18/1977 |
| 3934814 | Fluid-flow control valve In a fluid-flow control valve provided with jacking means (which may comprise a nut rotatable on a threaded shaft) operable to move a valve closure member into and out of seating engagement with a valve seat and to exert between the valve closure member a... | 01/27/1976 |
