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| Number | Title | Issue Date |
| 8079824 | Air compressing assembly An air compressing assembly includes an air tank disposed in a receptacle, an air blowing device disposed in the receptacle and coupled to the air tank for generating and supplying a pressurized air of a relatively lower air pressure and greater flowing quantity to ... | 12/20/2011 |
| 7335000 | Systems and methods for tethered wind turbines According to some embodiments, systems and methods for tethered wind turbines may be provided. In some embodiments, a system may comprise an airborne body extending horizontally along an axis between a first point and a second point, wherein the body is at least par... | 02/26/2008 |
| 7207183 | System and method for capacity control in a multiple compressor chiller system A capacity control algorithm for a multiple compressor liquid chiller system is provided wherein the speed and number of compressors in operation are controlled in order to obtain a leaving liquid temperature setpoint. In response to an increase in the load in the c... | 04/24/2007 |
| 7195462 | Method for controlling several pumps The invention relates to a method for controlling several pumps in a pump sump, with which each pump comprises a switch which switches on the pump and each pump after its running is first blocked and depending on the running of the further pumps in the pump sump is ... | 03/27/2007 |
| 7137265 | Apparatus and method for controlling oil of air conditioner An apparatus and a method for controlling oil of a multi-compressor installed in an air conditioner includes a microcomputer for sequentially stopping compressors installed in the air conditioner for a preset time and then sequentially operating the compressors when... | 11/21/2006 |
| 7040994 | Redundant array water delivery system for water rides A redundant array pumping system and control system is provided for water rides for ensuring continuous and non-disruptive supply of water. The pumping system incorporates a redundant pump and filter array in conjunction with a nozzle system for injecting water onto... | 05/09/2006 |
| 7015819 | Event notification system and wet well monitor An alarm detection device for monitoring high level signal in a wet well. The alarm detection device includes a fail safe circuit and an emulation circuit. The incoming high level signal is fed into the fail safe circuit and the emulation circuit. The emulated signa... | 03/21/2006 |
| 6932583 | Multiple stage pump with multiple external control valves A multiple stage pump having valves downstream from each respective pump in a same line thereof. The respective lines then merge into a common line. The multiple stage pump prevents pressure variations. The multiple stage pump includes a first pump in a first stage ... | 08/23/2005 |
| 6807817 | Method for operating compressors of air conditioner Disclosed is a method for operating a plurality of compressors of an air conditioner in accordance with a cooling or heating load in a room, in which a power supply unit for supplying power to the compressors is protected when a cooling or heating load in a room is ... | 10/26/2004 |
| 6705839 | Control system and method for air compressor In a device and a method for controlling an oiled air compressor (1), which is included in a compressed-air system (2) for a motor vehicle and which is driven by the engine (3) of the motor vehicle and supplies compressed air to at least one con... | 03/16/2004 |
| 6419454 | Air compressor control sequencer A controller for managing a plurality of compressors in an efficient manner such that the system uses less energy, has lower maintenance cost and experiences less wear. For a system with multiple compressors the controller has the minimum number of compre... | 07/16/2002 |
| 6287083 | Compressed air production facility A compressed air production facility includes at least one variable speed compressor and a plurality of constant speed compressor, which are connected in parallel with one another. The variable speed compressor and the plurality of constant speed compress... | 09/11/2001 |
| 6203280 | Pump totalizer system A method for totalizing the volume of liquid pumped to or from a vessel by a set of pumps. The method comprises the following steps: Calculating a running time for each of the pumps. Determining a first rate of change of volume when each of the pumps is t... | 03/20/2001 |
| 6186743 | Multiple pump sequencing controller A sequential controller is provided for sequencing multiple electric loads such electric pumps. That is, for each cycle the next load is designated as the lead load in a round-robin fashion. The controller uses cost effective electro-mechanical relay logi... | 02/13/2001 |
| 5622478 | Method for hydraulic gas compressor A gas compressor with at least three hydraulic cylinders is connected to a source of natural gas by a gas line. The gas line can also be removably attached to a storage tank. A hydraulic system is also connected to the cylinders. The compressor additional... | 04/22/1997 |
| 5351498 | Cooling system for electronic apparatus and control method therefor When cooling power corresponding to an amount of heat generated by an electronic apparatus can be generated by either n or n+1 cooling units, n+1 cooling units are operated such that each of the cooling units keeps a sufficient margin in reserve. In this ... | 10/04/1994 |
| 5327742 | Hierarchial control for discrete chiller units System and process are disclosed for the hierarchial control of a plurality of discrete chiller units each having individual dedicated controls. The system and process imposes limits on the amount of compression that can be demanded by the individual dedi... | 07/12/1994 |
| 5301513 | Monitoring and control of chiller units System and process are disclosed for the monitoring of certain parameters for the purpose of exercising supervisory control over a number of discrete chiller units each having their individual dedicated controls. The supervisory control is accomplished by... | 04/12/1994 |
| 5259731 | Multiple reciprocating pump system The present invention discloses a system for pumping a fluid into a common pressure outlet. The system contains a plurality of reciprocating pumps. A separate sensor coupled to one cylinder of each pump provides an electrical signal each time the piston i... | 11/09/1993 |
| 5213477 | Pump delivery flow rate control apparatus A control apparatus for controlling a delivery flow rate of a pump pressure-feeding process liquid within a process pipe system is described. The control apparatus has detecting means for detecting available N.P.S.H. of a pump on the basis of a pressure a... | 05/25/1993 |
| 5211031 | Scroll type compressor and refrigeration cycle using the same A scroll type compressor having a pair of scroll type compression units which are encased in the same casing so as to make a common use of a lubricating oil reservoir provided in the casing, wherein the compression units have compression elements, drive s... | 05/18/1993 |
| 5190442 | Electronic pumpcontrol system A sewage pumping system includes a container, an inlet for the inflow of liquid and a modality for ascertaining the liquid level in the container. Two or more pumps are provided, each having an inlet communicating with a container and an outlet communicat... | 03/02/1993 |
| 5165107 | Electronic delay timer and alarm system A time delay and alarm system is provided to ensure safe operation of periodically activated apparatus having potentially dangerous moving parts. The system preferably employs a 555 type integrated timer circuit, a horn, and a pulse generator which causes... | 11/17/1992 |
| 5094598 | Capacity controllable compressor apparatus A capacity controllable compressor apparatus has a plurality of high-pressure chamber compressors which are connected in parallel to a common refrigerant suction pipe and a common refrigerant discharge pipe, and oil equalizing pipes through which oil sump... | 03/10/1992 |
| 4987913 | Apparatus and method for controlling operation of storm sewage pump Storm water pumps drain storm water in a pump well. In order to control the storm water pumps, a radar rain gage and ground raingages are set. Measurement data from the radar rain gage and the ground rain gages are supplied to a data processing unit. The ... | 01/29/1991 |
| 4951475 | Method and apparatus for controlling capacity of a multiple-stage cooling system A method and apparatus for controlling the capacity of a multi-stage cooling system is disclosed. The system of the invention utilizes a plurality of commonly piped compressors having common suction load wherein at least one compressor being a variable sp... | 08/28/1990 |
| 4943212 | Means for feeding fluid into a pressure conduit Connected to a pressure conduit are a plurality of fixed displacement pumps and a variable displacement pump which are connectable and disconnectable in accordance with the amount of fluid withdrawn. The maximum delivery rate of the variable displacement ... | 07/24/1990 |
| 4897022 | Multi-tank/multi-pump water pressure booster system A multiple pump supply system having multiple pumps placed in parallel and having a plurality of reservoirs connected to acommon discharge line. The pumps are operated sequentially on demand sensed by a pressure sensor located at the mouth of the first re... | 01/30/1990 |
| 4880357 | Method and apparatus for producing high vacuum A method and apparatus for obtaining sub-atmospheric pressures including a venturi tube having a first end and a second end, a nozzle located in the first end of the venturi tube for spraying fluids, a collection chamber connected to the second end of the... | 11/14/1989 |
| 4825662 | Temperature responsive compressor pressure control apparatus and method A control system for controlling a closed-loop refrigeration system having multiple parallel commonly piped compressors is disclosed. Various combinations of compressors define the compressor capacity stages of the system. The disclosed control system res... | 05/02/1989 |
| 4799864 | Hydro-pneumatic pumpsets A packaged hydro-pneumatic pumpset system in which a plurality of pumps JI, M2, M3 are brought into operation sequentially as water pressure in the system drops below pre-set values. The system includes an accumulator 6 for storing water to maintain press... | 01/24/1989 |
| 4711275 | Air supply and control apparatus for inflatable mattress An air supply and control apparatus for an inflatable mattress 2 has several air compressors 1 which are operated in turn, during normal operation, to inflate the mattress 2. In the case of the pressure in the mattress 2 falling below an upper preset valu... | 12/08/1987 |
| 4705456 | Control panel structure for a liquid pumping station An easily viewed control panel structure indicating the status of and controlling the operation of a water, wastewater or process liquid pumping station where the pumping equipment is operated automatically with respect to a varying liquid level or pressu... | 11/10/1987 |
| 4631001 | T-fitting with one way valve and water level sensor for a sump apparatus A sump pump assembly having a primary sump pump and a secondary sump pump and including a T-fitting for connecting together the outlets of the primary sump pump and the secondary sump pump to a common exhaust. The T-fitting contains a one-way valve on the... | 12/23/1986 |
| 4615259 | Reciprocating gas compressor A Scotch yoke mechanism for actuating opposed-piston gas compressor is disclosed. The mechanism comprises a crank pin eccentrically extending from an end of a main drive shaft, a slider rotatably surrounding the crank pin, and a yoke defining a pair of op... | 10/07/1986 |
| 4478555 | Back pressure compensator for apparatus for controlling liquid level _in a reservoir A compensating device which includes a weighted lever adapted to be selectively disposed in restraining relation to a trip arm of an electrical switch controlling member responsive to head pressure in a reservoir main for cutting in or cutting out reservo... | 10/23/1984 |
| 4341983 | Automatic sequence control system An automatic system for controlling a plurality of motors includes motor starting circuitry and motor stopping circuitry that serves to sequentially start and stop the motors in the same cyclic order. The starting circuitry has a sensing component for sen... | 07/27/1982 |
| 4222711 | Sump pump control system An AC driven pump and a DC driven pump are positioned in a sump and respectively energized as the liquid in the sump reaches two different levels, the DC driven pump being automatically tested for operation after every predetermined number of pumping cycl... | 09/16/1980 |
| 4207030 | Apparatus for controlling liquid level in a reservoir A balance beam adjustable for a desired liquid level in a reservoir is under the control of a device responsive to pressure head in a main leading from, and reflecting the liquid level in, the reservoir, the beam being in charge of a pump control for one ... | 06/10/1980 |
| 4152902 | Control for refrigeration compressors A device for controlling a single variable capacity compressor, or multiple variable capacity compressors in either parallel flow or series flow chilling systems, senses temperature and load conditions and uses feedback in conjunction with synchronously a... | 05/08/1979 |
