Patents
Patents for F04B 49 - Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups (22,036)
12/1990
12/26/1990CN2068163U Electricity-saving cabinet for air compressor
12/26/1990CN1010968B Servo system
12/25/1990US4980059 Liquid chromatograph
12/25/1990US4979970 Method of manufacturing integrated optical component
12/25/1990US4979877 Wobble plate type refrigerant compressor
12/20/1990DE3919667A1 Control system for double compressor unit - has arrangement to vary main load on alternate basis
12/19/1990EP0402871A2 Control device for variable displacement pump
12/13/1990WO1990015252A1 Low pressure recirculation valve
12/13/1990WO1990015249A1 Variable displacement pump
12/12/1990EP0401485A1 A compressor unit for the production of compressed air for industrial uses
12/12/1990CN1047723A Power transmission
12/12/1990CN1010795B Input power control system of pump in fluid driving apparatus
12/11/1990US4976592 Variable capacity vane compressor
12/11/1990US4976590 Fluid conduit-responsively adjustable pump arrangement and pump/conduit arrangement and method, and fluid conduits therefor
12/07/1990CA2018296A1 Apparatus and method to test for valve leakage in a pump assembly
12/06/1990CA2014077A1 Compressor unit for the production of compressed air for industrial uses
12/05/1990EP0400507A2 High pressure unit
11/1990
11/30/1990CA2016448A1 Low pressure recirculation valve
11/29/1990DE4015780A1 Compression control for electromagnetic reciprocating-piston pump
11/27/1990US4972709 Pump control system, level sensor switch and switch housing
11/22/1990EP0398209A1 Reciprocating oil pump
11/21/1990CN1047140A Control apparatus used for refrigerant circuit having compressor with variable displacement mechanism
11/15/1990WO1990013762A1 Variable capacity pump controller of hydraulically driven wheel
11/15/1990WO1990013745A1 An electronic control for monitoring status of a compressor
11/13/1990US4969801 Method and apparatus for shutting off a compressor when it rotates in reverse direction
11/13/1990US4969334 Overspeed protection method for an automotive engine driven air conditioning compressor
11/08/1990DE3914485A1 Controlling delivery flow and pressure in pump - involves combination of pilot valve and throttle valve
11/08/1990DE3914342A1 Centrifugal pumping plant with electronic characteristic setting - secures redn. of speed and power as vol. flow increases from zero throughout range of control
11/07/1990EP0396328A1 A pump/motor control mechanism
11/07/1990CN1046778A Apparatus for controlling volume of pumps or motor
11/06/1990US4968934 Magnetic marking apparatus for magnetically measuring displacement of a moveable element in a well
11/06/1990US4968338 Inverter controlled air conditioner with optimum determination for over current detection
11/06/1990US4968227 Variable displacement fluid pump with improved wideband neutral
11/06/1990US4968221 Intake valve for vacuum compressor
11/06/1990US4968218 Method of controlling the air output of a screw compressor
10/1990
10/30/1990US4966531 Variable displacement vane compressor
10/30/1990US4966529 Stroke detection correcting system for variable displacement type compressor
10/30/1990US4966013 Method and apparatus for preventing compressor failure due to loss of lubricant
10/30/1990CA1275641C Micro-processor control of a movable slide stop and a movable slide valve in a helical screw rotary compressor with an economizer inlet port
10/24/1990EP0394061A2 Variable-stroke crank mechanism
10/24/1990EP0393950A1 Control apparatus used for refrigerant circuit having a compressor with a variable displacement mechanism
10/24/1990EP0393688A2 A hydraulic control system
10/23/1990US4965713 Terminal element
10/23/1990US4964985 Liquid chromatograph
10/23/1990US4964533 Pumping system
10/16/1990US4963075 Radial diaphragm pump
10/10/1990EP0391064A1 Intake valve for vacuum compressor
10/04/1990WO1990011449A1 Control arrangement for a two-cylinder pump for thick materials
10/03/1990EP0390628A1 Motor pump unit with a temperature control device on the outlet branch
10/02/1990US4960366 Slant plate type compressor with variable displacement mechanism
10/02/1990US4960152 Device for compensating by supplying a measured amount of fluid and its application for replenishing a hydraulic circuit
09/1990
09/25/1990US4958989 Digital fluid control of a pressure compensated pump
09/20/1990WO1990010793A1 Device for a variable displacement hydrostatic pump
09/20/1990DE3908610A1 Arrangement for generating compressed air
09/19/1990EP0283348B1 Hydraulic pumps
09/19/1990EP0171392B1 Load responsive system
09/18/1990CA1274095A1 Oil management in a parallel compressor arrangement
09/13/1990DE3844401A1 Variable delivery (displacement, volume) pump having hydraulic displacement for controlling the delivery rate (volumetric capacity) and/or pressure for at least two consumers (loads)
09/12/1990EP0386703A2 Controller for underwater pump
09/12/1990EP0385977A1 Hydraulic pump with integrated sump and accumulator
09/11/1990US4955795 Scroll apparatus control
09/05/1990EP0385501A2 Constant feed water device
09/05/1990EP0385211A1 Rotary hydraulic machine
09/05/1990CN1045160A Wobble plate type refrigerant compressor
08/1990
08/29/1990EP0383810A1 Rotary displacement compressor
08/28/1990US4952372 Peristaltic pump to control delivery
08/28/1990CA1273268A1 Dual pressure displacement control system
08/22/1990EP0383546A2 Fuel injection pump
08/22/1990EP0383029A2 Pressure washer with bypass
08/22/1990EP0382921A1 Reed valve
08/14/1990US4948345 Variable capacity compressor having a widened variable range of capacity
08/14/1990US4948340 Above-ground storage system
08/08/1990EP0380771A1 Method and apparatus for manufacturing casings, especially long casings, for excentric screw pumps or motors
08/08/1990EP0289513B1 An arrangement for changing the pressure in pneumatic or hyd-raulic systems
08/07/1990US4947153 Apparatus for monitoring the flow of fluid from a metering pump
07/1990
07/27/1990WO1990008602A1 High-pressure cleaning appliance
07/26/1990DE3902131A1 Hydraulic anti-lock brake system for motor vehicles
07/26/1990DE3900888A1 Radial piston machine
07/24/1990US4943279 Medical pump with infusion controlled by a detachable coded label
07/24/1990US4943212 Means for feeding fluid into a pressure conduit
07/24/1990US4943210 Pump control system, level sensor switch and switch housing
07/24/1990US4942737 Drive control system for hydraulic construction machine
07/17/1990US4941807 Hydraulic power generating pack
07/17/1990US4941505 Oil supply system for a burner nozzle including means for preventing the nozzle from dripping
07/17/1990US4941502 Low pressure recirculation valve
07/17/1990CA2007850A1 Pressure washer with spring-less outlet to inlet bypass
07/17/1990CA1271666A1 Pressure sensor for use in a diaphragm pump
07/12/1990DE3844399A1 Variable-displacement pump for a plurality of consumers which can be actuated independently of one another
07/10/1990US4940395 Scroll type compressor with variable displacement mechanism
07/10/1990US4940035 Internal combustion engine fuel
07/05/1990DE3938521A1 Hydrostatic radial piston machine - has adjustable centre offset between guide
07/05/1990DE3844403A1 Variable-displacement pump with a pump control valve
07/05/1990DE3844398A1 Control (controlled volume) pump
07/04/1990EP0375944A2 Variable-discharge high pressure pump
07/03/1990US4938666 Staged unloading of cylinder bank
07/03/1990US4938663 Air compressor malfunction detector
06/1990
06/28/1990WO1990007061A1 Pumping system for obtaining high vacuum
06/28/1990WO1990006781A1 Fluid flow control apparatus
06/27/1990EP0375207A2 Scroll apparatus control
06/26/1990US4936747 Compressor with condition responsive cut-off means