"Rail travel at high speeds is not possible because passengers, unable to breathe, would die of asphyxia."
Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7832989 | Pump applied to fuel storage device and portable device with fuel storage device for fuel cells The pump comprises a pump body, a control member, an elastic member, and blades. The pump body has a holding space, one or more pump inlets, and one or more pump outlets. The holding space, the pump inlets, and the pump outlets communicate with each other. The pump ... | 11/16/2010 |
| 7195296 | Portable remote hydraulic activator An apparatus that remotely actuates a hydraulic motor of a hydraulic device including a mounting device supported by the hydraulic device; a hydraulic pump located on the mounting device for supplying pressurized fluid to the hydraulic motor; a driving device locate... | 03/27/2007 |
| 6398508 | Control switch assembly for an air pump A control switch assembly for an air pump has a unidirectional valve mounted inside a port that is mounted together with a contact device on an actuation device. The actuation device has an extension slidably received in the actuation device and controlla... | 06/04/2002 |
| 6269493 | Breakaway drain cover A spa system which emp loys a removable drain cover. Removal of the drain cover will cause a proximity switch to turn off the circulation pump in the spa. In a preferred embodiment, the removable drain cover has a magnet attached to it and a magnetically ... | 08/07/2001 |
| 6053361 | Out-of-fluid detector for reciprocating pumps A dynamic displacement sensor for detecting an out-of-fluid condition in a liquid delivery system detects an increased amplitude of pump motion of a reciprocating air pump and provides an output signal upon detecting the increased amplitude motion. The de... | 04/25/2000 |
| 5690476 | Safety device for avoiding entrapment at a water reservoir drain A safety device for avoiding entrapment at a water reservoir drain by using a vacuum operated switch to interrupt power to the reservoir pump whenever a blockage occurs. In addition, a manual reset switch requires human intervention to re-activate the res... | 11/25/1997 |
| 5624237 | Pump overload control assembly A pump overload control assembly is for use with an electric motor driven pump in a water pumping system. The assembly includes a pump overload control device coupled to a fluid responsive switch, thereby forming a pump overload control circuit that inter... | 04/29/1997 |
| 5228485 | Flexible tubing occlusion sensor A system for sensing fluid conduit occlusion that reacts to occlusion force applied by changing the state of a switch only if a predetermined minimum force has been applied through the conduit. The system includes a contact member arm that cooperates with... | 07/20/1993 |
| 5091686 | Operation control circuit for pump motor An operation control circuit for pump motor which is made such that driving condition of pump motor is checked and then when its driving condition is abnormal than driving of the pump motor can be stopped. The operation control circuit includes a pump environm... | 02/25/1992 |
| 4990057 | Electronic control for monitoring status of a compressor The compressor controller includes a timing circuit for timing-out a detected fault in a compressor. Upon the fault existing for longer than a predetermined time limit, the controller removes power from the compressor. If the fault is corrected within the... | 02/05/1991 |
| 4969801 | Method and apparatus for shutting off a compressor when it rotates in reverse direction A fluid compression system includes a fluid compression device which pressurizes fluid. A pressure sensor senses pressure generated by the compression device. A control device indicates operating parameters and functions of the compression device, graphic... | 11/13/1990 |
| 4930550 | Gaseous fueled torch apparatus and fueling module therefor The disclosed gaseous fuel torch apparatus is adapted for use in cutting, welding, heating or other such operations involving the heating, cutting, or fusing of either metallic or non-metallic materials. The apparatus includes a fueling module for supplyi... | 06/05/1990 |
| 4776766 | Portable air pump assembly and detechable safety lamp for automotive vehicle A portable air pump assembly and detachable safety lamp, includes an air compressor; an air supply line supplying pressurized air from the air compressor to a tire; an electrical supply line supplying current to the air compressor; electrical contacts whi... | 10/11/1988 |
| 4776366 | Gaseous fueled torch apparatus and fueling module therefor The disclosed gaseous fuel torch apparatus is adapted for use in cutting, welding, heating or other such operations involving the heating, cutting, or fusing of either metallic or non-metallic materials. The apparatus includes a fueling module for supplyi... | 10/11/1988 |
| 4735553 | Straight peristaltic pump for conveying concrete or the like This invention relates to a straight peristaltic pump for conveying concrete or the like, comprising a straight hose adapted to be elastically flattened and extending between a base and pressure rollers; the rollers are mounted idly about transverse pins ... | 04/05/1988 |
| 4712648 | Dual magnetic coil driver and monitor sensor circuit Sensor circuitry is disclosed for a transducer (32) having a sensor or delta coil (66) for generating a magnetic flux through a path of movement of a magnetically permeable piston member (48), such that movement of the member (48) changes the return coupl... | 12/15/1987 |
| 4684327 | Washing machine fluid discharge monitoring unit An apparatus for monitoring the level of water being pumped into kitchen sinks, laundry tubs, and standpipes. The apparatus features a novel fluid levels ending unit operatively connected to a novel control unit for providing maintained termination of ele... | 08/04/1987 |
| 4614479 | Adjustable automatically controlled pneumatic pump device An adjustable automatically controlled pneumatic pump device includes an air pump, an electric motor adapted for being energized by a power source to drive the air pump, an air hose member with an exhaust port at one end, and an other end of the hose memb... | 09/30/1986 |
| 4544328 | Sold-out device for syrup pump A control device associated with a pneumatically-driven demand pump comprising a valve system which shuts off the gas which drives the pneumatic pump in response to a pressure-sensitive diaphragm which detects variations in pressure in the fluid output fr... | 10/01/1985 |
| 4511063 | Self supplying hawk An apparatus for maintaining a continuous supply of cementitious material such as stucco or plaster on the hawk of a workman skilled in applying said materials to surfaces with a trowel. Cementitious material stored in bulk in a hopper remote from the wor... | 04/16/1985 |
| 4505643 | Liquid pump control A circulating pump (B) pumps water between a swimming pool or other reservoir (A) and a filter or other circulated fluid receiving apparatus (C). A control circuit (D) intermittently operates the circulating pump. The operating circuit includes a first ti... | 03/19/1985 |
| 4286925 | Control circuit for shutting off the electrical power to a liquid well pump A control circuit for turning off the electrical power to the drive motor, which reciprocates a polished rod of a pump, when the pump has exhausted the supply of liquid in the well. Simultaneously measuring the polished rod load and rod position and turni... | 09/01/1981 |
| 4239457 | Remote reset The finger is pivoted to the housing of a vibration switch mounted in a remote location. A cord attached to the finger leads to a convenient position. Pulling the cord resets the switch.... | 12/16/1980 |
| 4135859 | Pollution control device adapted for attachment to reservoir gland stuffing boxes An oil reservoir gland stuffing box employed to extend the service life of the packing by providing an oil reservoir to maintain essential lubrication is provided with an attached container which will receive the overflow of the oil reservoir should the p... | 01/23/1979 |
| 4130382 | Control system for irrigation pumps A rain activated control system which shuts off an irrigation pump when a predetermined amount of rainfall occurs. A receptacle for catching rain is mounted in a manner to provide adjustment of the distance between its bottom and a pair of electrodes whic... | 12/19/1978 |
| 4080105 | Tire inflator An inflator for tires having a housing adapted to be hand held, with air compressor means including an electric motor mounted in the housing for supplying air under pressure to a tire. Adjustable valve means is mounted on the housing and operatively conne... | 03/21/1978 |