Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 7252029 | Hydraulic tilting device for tilting the cab of a vehicle A hydraulic tilting device for tilting the cab of a vehicle between a driving position, in which the vehicle can be driven normally, and a tilted position, in which, for example, maintenance can be carried out on a vehicle engine positioned beneath the cab. The tilt... | 08/07/2007 |
| 7048073 | Fastener installation systems A fastener installation tool to install fasteners, such as rivets, risers, standoffs, and other types of fasteners operates upon vacuum and air pressure. Fasteners are installed with minimal reactive forces to the operator's hand, thus reducing the risk of repetitiv... | 05/23/2006 |
| 7028525 | Method and a device for deformation of a material body The device comprises a stamping member (2) arranged to be conveyed towards and hit a material body (1) with such a velocity that a rebound motion of the stamping member (2) is generated while a permanent deformation of the material body (1 | 04/18/2006 |
| 6109161 | Hydraulic driven tool controlling apparatus When a start SW 3 is pressed, a one-shot multivibrator circuit 15 turns on and releases a pulse. The pulse is transmitted to a self-hold circuit 16 which in turn stays in self-hold mode and releases an H level output continuously until it is reset. This c... | 08/29/2000 |
| 5896802 | Rotating apparatus for a diesel motor A rotating device for a diesel motor comprises a unit having a plurality of pneumatic cylinders that can be brought into mating engagement with teeth on a flywheel of the motor. Each pneumatic cylinder, under the control of a control unit, is actuated and... | 04/27/1999 |
| 5715724 | Adaptive, self-regulating forging hammer control system In forging hammers, according to the present invention, more than one inlet valve is employed and more than one exhaust may be employed. The force of impact for a particular blow is controlled by the number of valves employed and the timing of the opening... | 02/10/1998 |
| 4919039 | Hydraulic turning gear A turning gear is used to rotate a turbine rotor under conditions where it is heating up or cooling down without sufficient motive fluid to cause it to rotate. The turning gear avoid the occurence of a thermal bow. A hydraulic turning gear is disclosed fo... | 04/24/1990 |
| 4693101 | Adaptive, self-regulating forging hammer control method A die forging hammer senses the pressure of striking air and the pressure of lifting air from within the cylinder as well as ram start position. Various empirical information is stored and available to a computer which uses the inputs to compute velocity ... | 09/15/1987 |
| 4633903 | Distributing control valve with hydraulic control A 4/2 type distributing control valve characterized by compactness, ruggedness and high sampling frequency, the valve comprising two index plates (6, 7), each having teeth about its perimeter, provided with axial switching bores (8, 9, 10, 11). The two sw... | 01/06/1987 |
| 4564043 | Stepping valve This invention relates to a pneumatically actuated stepping valve for an automatic control of inlets and outlets for a pneumatic fluid. Each stepping movement is performed in response to a feedback signal indicating that an operation controlled by the val... | 01/14/1986 |
| 4561343 | Sequencing valve mechanism A sequencing valve mechanism utilized to control a pneumatic or hydraulic pressure medium from an on/off type pressure source to a two-chambered pneumatic or hydraulic appliance is disclosed. A pawl on a ratchet arm is driven around a ratchet island by th... | 12/31/1985 |
| 4514149 | Cutting fluid supply apparatus A system for providing a high pressure pulsating flow of cutting fluid includes a piston pump having a piston cylinder for pumping the cutting fluid and an air cylinder for reciprocatingly actuating the piston cylinder. An air-operated direction change-ov... | 04/30/1985 |
| 4503751 | Digital fluid stepping motor Three radially extending push rods (26, 28, 30) make contact with an undulating cam surface on the periphery of a cam (10). The push rods (26, 28, 30) are driven inwardly by electrical solenoids (94, 96, 98) or fluid motors (106, 108, 110). At the end of ... | 03/12/1985 |
| 4478248 | Rotary valve A rotary valve having a housing with a center section and a pair of end sections attached to the center section. A rotary shaft extending axially through the center section into said end sections with bearings in each end section rotatably supporting an e... | 10/23/1984 |
| 4457678 | Fluid drive mechanism A mechanism for moving an element in opposite directions includes a piston connected with the element. The piston reciprocates in a cylinder as high pressure fluid is alternately directed against one side or the other of the piston by a rotatable directio... | 07/03/1984 |
| 4439114 | Pumping system A fluid operated pumping system which includes a main power cylinder divided into a power chamber and a pump chamber by a reciprocally mounted power piston. An actuator piston is connected to the power piston for synchronous movement therewith and is reci... | 03/27/1984 |
| 4402652 | Liquid motor and pump with a stroke regulating gas motor A liquid motor is driven by pressurized wet glycol, received from an absorber of a natural gas dehydrating system, and utilizes the energy of the pressurized wet glycol to provide the primary source of energy for operating a pump for pumping of dry glycol... | 09/06/1983 |
| 4373874 | Fluid actuated pump system A pump system includes a source of fluid under pressure conveyed into a fluid chamber containing meshing gears which are rotated by the pressurized fluid to, in turn, transmit rotation to a unitary valve member positioned in a housing. Rotation of the gea... | 02/15/1983 |
| 4360323 | Proportioning pumping system for dialysis machines A compact and highly reliable proportioning pumping system for supplying a precise and controllable mixture of concentrate and water in a kidney dialysis machine comprises a central body and a pair of oppositely mounted pivotable linkages coupled to the b... | 11/23/1982 |
| 4342255 | Oscillator actuated hydraulic impulse device An oscillator actuated hydraulic impulse of the type including a spool valve actuated by an alternating signal from an oscillator to switch the hydraulic pressure in a double acting cylinder in order to cause reciprocating motion of a piston which strikes... | 08/03/1982 |
| 4251898 | Intermittently operating air actuated windshield wiper A control valve has a first position in which it directs air under pressure to a wiper motor through a "run" line to actuate the motor to oscillate the wiper. The control valve has a second position in which it directs air through a park line to a valve c... | 02/24/1981 |
| 4173303 | Hydraulic push drive for pusher centrifuges A hydraulic push drive for pusher centrifuges, having a rotating body with a cylindrical bore. The rotating body is provided with a piston rod and piston body therein. A rotary control valve is disposed in the rotating body. The rotary control valve is dr... | 11/06/1979 |
| 4131164 | Adaptive valve control system for an impact device Switch means on the frame of a forging device senses when the ram and piston enter a first zone of a pneumatic cushion during retraction to initiate timing. If a predetermined time has expired before the ram leaves the first zone, the fluid inlet valve is... | 12/26/1978 |
| 4129064 | Fluid operated stepping motor A fluid operated stepping motor comprising a cylinder housing having one or more fluid cylinders to alternately displace at least two cam engaging members when pressure from a pressure source is applied to one of the cylinders. The cam engaging members ar... | 12/12/1978 |
| 4112680 | Control systems and arrangements for mineral mining installations In a mineral mining installation employing a series of shifting rams for advancing a scraper-chain conveyor provided with a guide for a mining machine, a control system is used to provide a succession of small fluid doses to the rams. Control signals, pre... | 09/12/1978 |
| 4060022 | Hydraulic motor having positive locking means A hydraulic motor having a housing and a shaft journaled for rotation along the longitudinal axis of the housing. The shaft carries an eccentric on which is rotatably mounted a bearing block. The housing has a plurality of hydraulic cylinders grouped abou... | 11/29/1977 |
| 3995530 | Shaking machine A shaking machine for shaking core sand out of hollow castings includes a pair of coaxial cylinders containing pistons with piston rods arranged to grip a casting, and a rotating vane air valve for supplying compressed air alternately to each of the two c... | 12/07/1976 |
