| 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) |
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| 02/28/1978 | US4076458 Automatic pump speed controller |
| 02/28/1978 | US4076457 Downhole pump speed control |
| 02/28/1978 | US4075933 Hydraulic pump or motor |
| 02/21/1978 | US4074955 Pumping arrangement control device |
| 02/21/1978 | US4074612 Fluid operated hydraulic pump |
| 02/21/1978 | US4074529 Load responsive system pump controls |
| 02/07/1978 | US4072443 Control valve arrangements for variable stroke pumps |
| 02/07/1978 | US4072442 Variable delivery hydraulic pump |
| 01/17/1978 | US4068980 Compressor startup control |
| 01/17/1978 | US4068562 Cylinder of piston compressor |
| 01/10/1978 | US4067664 Control system for a pump |
| 01/03/1978 | US4066123 Hydraulic pumping unit with a variable speed triplex pump |
| 12/27/1977 | US4065229 Variable capacity radial-4 compressor |
| 12/27/1977 | US4065228 Hydraulic control for variable displacement pumps |
| 12/27/1977 | US4065226 Water well monitor |
| 12/13/1977 | USRE29495 Apparatus and method for a metering system |
| 12/13/1977 | US4062640 Method and means for controlling long stroke pumping units |
| 12/06/1977 | US4061271 Control system for high pressure hydraulic system |
| 11/29/1977 | US4060343 Capacity control for rotary compressor |
| 11/29/1977 | US4060340 Air compressor with inlet diversion valve |
| 11/29/1977 | US4060339 Method and apparatus for controlling a gas-producing facility |
| 11/29/1977 | US4060178 Metering pump |
| 11/22/1977 | US4059367 Gaseous fluid compressing apparatus |
| 11/22/1977 | US4059366 Thermal overload protective system |
| 11/15/1977 | US4058757 Well pump-off controller |
| 11/08/1977 | US4057174 Measuring liquid dispenser with flat top |
| 11/01/1977 | US4056042 Rotary hydrostatic piston machine with eccentrically movable guide means |
| 10/25/1977 | US4055069 Portable manually controlled hydraulic pipe bending apparatus |
| 10/25/1977 | US4055046 Control system having override for fluid operated work elements |
| 10/11/1977 | US4053089 Pump for dispensing liquids |
| 10/04/1977 | US4052135 Control system for helical screw compressor |
| 09/27/1977 | US4050852 Variable displacement radial piston compressor |
| 09/27/1977 | US4050478 Combined fixed and variable displacement pump system |
| 09/27/1977 | US4050247 Control valve for variable displacement pump or motor |
| 09/13/1977 | US4047844 Blood pumping system |
| 09/13/1977 | US4047665 Spray control system |
| 08/30/1977 | US4045343 High pressure liquid chromatography system |
| 08/23/1977 | US4043710 Compressor unloader assembly |
| 08/23/1977 | US4043419 Load sensing power steering system |
| 08/23/1977 | US4043122 Fluid cam assembly |
| 08/16/1977 | US4041843 Axial-piston variable-delivery pump with valve directional control of pressure fluid |
| 08/16/1977 | US4041800 Stroke length adjusting devices |
| 08/02/1977 | USRE29333 Hydraulic apparatus for regulating the flow of one or more pumps |
| 07/26/1977 | US4037994 Pressure unloading valve device for compressor |
| 07/26/1977 | US4037573 Timing control for fuel injection pump |
| 07/19/1977 | US4036561 Primary coolant pump for nuclear reactors |
| 07/12/1977 | US4035107 Pump system for high pressure abrasive liquids |
| 07/12/1977 | US4035106 Control devices for reversible flow variable capacity hydraulic machines |
| 07/12/1977 | US4035105 Variable-output pump control arrangement |
| 07/12/1977 | US4034808 Method for pump-off detection |
| 07/12/1977 | US4034564 Piston pump assembly having load responsive controls |
| 07/05/1977 | US4033738 Heat pump system with multi-stage centrifugal compressors |
| 06/28/1977 | US4032260 Hydraulic control device |
| 06/21/1977 | US4030857 Paint pump for airless spray guns |
| 06/21/1977 | US4030495 Twin check valve pump system having fail-safe characteristic |
| 06/14/1977 | US4029439 Control system for variable displacement pumps |
| 06/14/1977 | US4029293 Control valve |
| 06/14/1977 | US4028890 Piston pump assembly utilizing load pressure control |
| 06/07/1977 | US4028018 Non-pulsing apparatus |
| 06/07/1977 | US4028016 Rotary displacement compressor with capacity control |
| 06/07/1977 | US4028011 Low well yield control system |
| 06/07/1977 | US4028010 Reversible, variable-displacement piston pump with positioner means for automatic return to zero displacement |
| 05/31/1977 | US4026439 Precision fluid dispensing and mixing system |
| 05/31/1977 | US4026122 Refrigeration system |
| 05/24/1977 | US4025239 Reciprocating compressors |
| 05/24/1977 | US4024711 Throttle control mechanism for an engine |
| 05/17/1977 | US4023592 Pump and metering device |
| 05/10/1977 | US4022551 Variable capacity type gear pump |
| 05/10/1977 | US4022275 Methods of use of sonic wave generators and modulators within subsurface fluid containing strata or formations |
| 05/10/1977 | US4022174 Electromagnetically actuated pumps |
| 05/10/1977 | US4022023 Hydraulic circuit for controlling actuators in a construction vehicle |
| 05/03/1977 | US4021154 Servomechanism for pump capacity control |
| 05/03/1977 | US4021152 Electromagnetic pump |
| 05/03/1977 | US4021144 Submersible pump with float switch |
| 04/26/1977 | US4019837 Pressure unloading apparatus for a diaphragm pump |
| 04/19/1977 | US4018546 Pump device for flow rate control of liquid in a piping system |
| 04/19/1977 | US4018545 Mix blending pump |
| 04/12/1977 | US4017221 Combined unloading and relief valve for pump unloading circuit |
| 04/12/1977 | US4017219 Control system for variable displacement pumps |
| 04/12/1977 | US4017218 Dual-speed setting underspeed system |
| 04/12/1977 | US4017217 Overspeed protection system |
| 04/12/1977 | US4017216 Variable underspeed system linkage |
| 04/12/1977 | US4017215 Infinitely variable orifice for part throttle control |
| 04/12/1977 | US4016895 Flow control valve |
| 04/05/1977 | US4015469 Pump-off monitor for rod pump wells |
| 03/29/1977 | US4014630 Power steering pump |
| 03/29/1977 | US4014461 Automatic change-over device for liquid dispensing system |
| 03/22/1977 | US4013381 Pump control assembly having adjustable biasing means |
| 03/22/1977 | US4013380 Control systems for variable capacity hydraulic machines |
| 03/15/1977 | US4012178 Hydraulic pump with replaceable pumping member |
| 03/15/1977 | US4011796 Radial hydraulic pump or motor with improved pistons and slippers |
| 03/08/1977 | US4011354 Method and apparatus for making tubular resin elements such as pipes |
| 03/01/1977 | US4009971 Electric motor-driven, double-acting pump having pressure-responsive actuation |
| 03/01/1977 | US4009756 Method and apparatus for flooding of oil-bearing formations by downward inter-zone pumping |
| 02/22/1977 | US4008571 Hydraulic system for electric lift trucks |
| 02/15/1977 | US4008011 Piston compressor |
| 02/15/1977 | US4008004 Control system for variable displacement pumps |
| 02/15/1977 | US4007592 Power transmission |
| 02/08/1977 | US4006668 Hydrostatic piston machine having a cylindrical mounting pin |
| 01/25/1977 | US4004431 Control for cooling unit |