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...that the first rickshaw was invented in 1869 by an American Baptist minister, the Rev. E. Jonathan Scobie, to transport his invalid wife around the streets of Yokohama?
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| Number | Title | Issue Date |
| 7267137 | Deadweight pressure standards using non-hysteresis sylphons A deadweight pressure standard provides improved measurement accuracy and repeatability. The standard includes a flow regulator having a first valve controlled by a first pair of non-hysteresis sylphons, and a supply regulator having a second valve controlled by a s... | 09/11/2007 |
| 7209806 | Self-contained electronic pressure monitoring and shutdown device The invention is a self-contained process shutdown device that detects abnormal pressures and initiates shutdown by removing the pneumatic or hydraulic pressure needed for a given process or flow to continue. The process' pressure is detected by means of a switch-ga... | 04/24/2007 |
| 7150194 | Gauge pressure sensor for hazardous applications Methods and apparatus for sensing a gauge pressure use a pressure gauge pressure sensor that includes a housing and a gauge pressure sensing element having a first pressure inlet and a second pressure inlet. The first pressure inlet is associated with a pressure to ... | 12/19/2006 |
| 7100890 | Swabbable luer-activated valve A normally closed valve that may be opened upon insertion of a nozzle permits two-way flow when opened by a luer-taper nozzle. The valve also is able to resist large back pressures. The valve includes a substantially rigid housing that defines a passageway having an... | 09/05/2006 |
| 7089940 | Balanced valve device and breathing apparatus comprising such valve device A valve device, particularly for a breathing regulator for divers, including an inlet chamber which can be connected to a source of gas under super-atmospheric pressure, and an outlet chamber which is under a regulated pressure. A seating, which is movable under the... | 08/15/2006 |
| 7067010 | Indexing spray machine The machine is an index spraying machine. The machine has five different stations. The first station is the load/unload station. At this station, work pieces are unloaded after they have been sprayed and new work pieces to be sprayed are loaded on. New pieces then m... | 06/27/2006 |
| 6623248 | System for conveying liquids without pulsing A system tot the pulsation-free delivery of liquids, which system may be used for high-purity, liquid chemicals in the semiconductor industry.... | 09/23/2003 |
| 6415617 | Model based economizer control of an air handling unit A strategy for controlling an air side economizer of an HVAC system uses a model of the airflow through the system to estimate the load in two modes when minimum and maximum amounts of outdoor air are being introduced into the building. Transitions betwee... | 07/09/2002 |
| 6224356 | Check valve stop and ports A valve return passage for quickly returning a valve to a closed position, includes return passages for communicating discharge pressurized fluid to a rear surface of a floating valve. The use of the return passages ensures that pressurized gas is communi... | 05/01/2001 |
| 6171066 | Automatic pneumatic pressure control apparatus and method of controlling same When a steplike reference signal is supplied while a switch is open, an offset signal for compensating for the dead time of a pneumatic device is generated by an offset generator and supplied as a manipulated variable for the pneumatic device. When a feed... | 01/09/2001 |
| 5873946 | Installation and a process for lubricating, cleaning and/or disinfecting conveyor belts An installation for lubricating, cleaning and/or disinfecting conveyor belts for containers, more particularly for foods, such as bottles, glasses, cans, bags and the like, comprising a central metering station connectable to a water pipe used to dilute a... | 02/23/1999 |
| 5439021 | Electro-pneumatic converter An electro-pneumatic converter device with modular components and with supporting housing structure enabling the device to be readily convertible from a current to pressure positioner to a current to pressure transducer. A valve positioner with an enclosu... | 08/08/1995 |
| 5257639 | Electropneumatic positioner A transducer having an explosion-proof housing with a divider forming two compartments, and the divider having formed therein a well. A magnet and flapper arm arrangement is suspended within the well. A coil winding is fixed in the other compartment aroun... | 11/02/1993 |
| 5159949 | Electropneumatic positioner A transducer having an explosion-proof housing with a divider forming two compartments, and the divider having formed therein a well. A magnet and flapper arm arrangement is suspended within the well. A coil winding is fixed in the other compartment aroun... | 11/03/1992 |
| 4953578 | Dual mode pneumatic control system This invention relates to a pneumatic control device having an operating mode selecting means for operating in either the manual or automatic modes. Pneumatic pressure is regulated in the manual mode by a hand operated leakport, and in the automatic mode ... | 09/04/1990 |
| 4821760 | Voice coil assembly for an electropneumatic converter An electropneumatic converter is provided with a voice coil having a vane directly connected to the coil. The vane and coil assembly is attached to a spring and resiliently supported by the spring for movement relative a nozzle outlet in response to dc in... | 04/18/1989 |
| 4804009 | Pneumatic interface apparatus for control of process systems The incremental interface system of the present invention includes a pneumatic input means for providing a first pressure to be regulated. A pressure repeater means includes a volume relay having a first chamber coupled to the intermediate bus of the inpu... | 02/14/1989 |
| 4770200 | Pneumatic interface apparatus The interface apparatus of the present invention includes a pneumatic flow control means for controlling the number of moles of a gas confined within a substantially constant volume of gas at a first pressure. A volume relay has a first chamber coupled to... | 09/13/1988 |
| 4760859 | Modular pressure instrument A modular transmitter has an outer housing with a wall forming an interior cavity in which a control module is inserted. The wall has one or more ports therein that are connected to pressure conduits. When the control module is fully seated, the ports ali... | 08/02/1988 |
| 4715397 | Pressure regulator A pressure regulator (75) of a flow control system includes a pair of orifices (140 and 145), the effective areas of which are controlled by a pair of flexible closures (150 and 155) unidirectionally stiffened against fluid flow thereagainst. The closures... | 12/29/1987 |
| 4679583 | Pneumatic control system, control means therefor and method of making the same A pneumatic control system, control unit and method of making the same are provided, the system comprising a pneumatic source, a pneumatically operated device that produces an output, and a control unit for interconnecting the source to the device. The co... | 07/14/1987 |
| 4665938 | Frequency feedback on a current loop of a current-to-pressure converter A current-to-pressure (I/P) converter provides an output pressure as a function of the magnitude of a variable input DC current. The I/P converter includes a pressure sensor which produces a feedback signal representative of the output pressure. Based upo... | 05/19/1987 |
| 4616670 | High-low pressure pilot An extremely accurate and reliable fluid pressure sensor for monitoring process pressure and sensing when predetermined pressure set points or limits have been reached. A Bourdon tube with a pivotally moving lever end responds to the process pressure. Whe... | 10/14/1986 |
| 4611619 | Air conserving restriction for use in pneumatic systems A pneumatic condition sensing system for reducing the consumption of air supplied by a pneumatic source, the system having a bleed type pneumatic device for bleeding air from a branch line to atmosphere to control the pressure within the branch line in re... | 09/16/1986 |
| 4605033 | Pneumatic converter having variable gain relay stack A pneumatic positioner is provided with a O-shaped vane that is movably supported at the ends of each of its legs. The nozzle has an air outlet proximate to and aligned with the vane. A nozzle, connected to a source of air under pressure, is attached to a... | 08/12/1986 |
| 4576194 | Pneumatic control system, control means therefor and method of making the same A pneumatic control system, control unit and method of making the same are provided, the system comprising a pneumatic source, a pneumatically operated device that produces an output, and a control unit for interconnecting the source to the device. The co... | 03/18/1986 |
| 4554938 | Device for converting electric signals into pneumatic signals In a device for converting electric signals into pneumatic signals, a soft-iron core (3) and a coil (2) are arranged stationary. The soft-iron core has an air gap (7) between two pole shoes (5, 6). A permanent magnet (8) is movably arranged within this ga... | 11/26/1985 |
| 4543975 | Fluid pressure regulating valve mechanism A fluid pressure regulating valve includes a diaphragm piston reciprocally movable within a valve housing, whereby undesirable diaphragm piston flutter is effectively dampened by use of a dampening member. The diaphragm piston separates a control chamber ... | 10/01/1985 |
| 4534376 | Electric signal to pressure signal transducer An electric signal to pneumatic signal transducer 10 comprises a nozzle 12 that accepts an input pneumatic supply and expels a gas stream 20. A receiver 16 that is spaced from the nozzle is positioned to recover at least a portion of the gas stream. The r... | 08/13/1985 |
| 4532951 | Transducer utilizing electrical and pneumatic signals An electrical-pneumatic transducer includes a pneumatic relay in which the pressure of the air at the outlet varies in accordance with the back pressure of the air at a bleed nozzle in the relay. This back pressure is changed by the armature of a solenoid... | 08/06/1985 |
| 4509403 | Positioner having user-adjustable dynamic response A positioner-actuator control system includes a pair of relays and a pivotally mounted beam for operation thereof in response to a pneumatic control signal. A summing beam has forces applied to it from an input signal, a controlled device position lever, ... | 04/09/1985 |
| 4428391 | Circuit for pneumatic controllers A circuit for pneumatic controllers, a proportional-action range of which is adjustable, with the circuit including at least one differential amplifier having input pressure chambers being exposed to pressures derived between two throttle resistors respec... | 01/31/1984 |
| 4421271 | Zero energy band subbase for pneumatic thermostats A pneumatic subbase for modifying the operation of a pneumatic thermostat is disclosed having a first nozzle to be connected to a source of main pressure, a second nozzle for supplying branch output pressure to the device being controlled, a third nozzle ... | 12/20/1983 |
| 4336819 | Pneumatic converter A pneumatic converter comprising a bellows having in its interior a coupling plate connecting the two ends of the bellows together at a position offset from the center axis of the bellows.... | 06/29/1982 |
| 4332269 | Sloped nozzle pneumatic device A pneumatic device is arranged for reducing positive feedback and includes a housing having a diaphragm defining a control chamber, the control chamber being connected to an input and having a pressure therein dependent upon an input pressure, the control... | 06/01/1982 |
| 4314578 | Fluid signal transmitting apparatus A fluid signal inverting unit includes a motion balance unit having a lever which operates a valve. The balance lever is supported at the opposite ends by a pilot signal chamber and a feedback signal chamber and an intermediate pivot support is coupled to... | 02/09/1982 |
| 4312475 | Flow adjustment mechanism for air distributor systems An adjustment mechanism for adjusting the maximum flow rate of conditioned air in an air distribution system controlled by a pneumatic control circuit. An air bladder controls the distribution of air, and the pressure is bled from the bladder under the co... | 01/26/1982 |
| 4290441 | Control device and method of making the same A control device having a housing provided with a main lever pivotally mounted thereto by a pivot structure and being operatively associated with a flapper to move the same relative to a leakport in relation to pivotal movement of the main lever. The devi... | 09/22/1981 |
| 4285357 | Pneumatic relay A pneumatic relay responsive to an air input signal whose pressure represents a variable, the relay producing an air output signal proportional thereto. The relay includes an input chamber to which the input signal is fed, this chamber being separated fro... | 08/25/1981 |
| 4263931 | Multiple load integrated fluid control units A mixed air conditioning controller is formed as a factory assembled and adjusted unit in a compact housing, with simple and direct input/output field connectors. Various temperature and humidity input devices are field connected to produce a sequenced co... | 04/28/1981 |
