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JP2005147756A |
To provide a liquid feed pump device for stably performing liquid feed even if the amount of liquid fed is very little.An adjustment flow path 40 is provided and connected in parallel with first and second pump mechanisms. The liquid fed...
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JP3653166B2 |
To dampen pulsation at several frequencies, and to make first and second pulsation damping systems compact. In this device in which a first container 13 is arranged on the front end side of a branch pipe connected to a pipe line 3, and a...
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JP3648708B2 |
To efficiently smooth a pulse of a fluid in a solenoid pump for forcedly opening/closing a check valve provided on the upstream side rather than a solenoid valve by an opening/closing action of the solenoid valve. In the solenoid pump in...
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JP2005117889A |
To provide a nobel motor and pump complex capable of reducing noise.This motor and pump complex (10), especially for a vehicular servo steering device, has a motor and pump unit (14) and an outer housing (12) surrounding the motor and pu...
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JP2005090296A |
To provide a noise reduction device for a piston pump capable of reducing noise occurring while driving a piston pump.The noise reduction device 10 is equipped with a tank 14 communicating with a cylinder 32 of the piston pump 12 for sto...
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JP2005083265A |
To provide a pump which has satisfactory pulsation absorbing performance and can be formed in a compact size.This pump is provided with a liquid discharge chamber 27 and two or more pulsation absorbing air chambers 29a, 29b communicated ...
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JP3604402B2 |
A device for reducing pulsation of an oil flowing in a hydraulic pipe line, which comprises a closed pipe branching from the pipe line and closed at an end, and at least one restriction for dividing the interior of the closed pipe into a...
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JP2004537675A |
A pumping arrangement for a paint circulation system comprising a reciprocating pump (13), and characterized by an alternating current induction motor (15), a rotary-to-linear motion converter (16) coupling the output of the induction mo...
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JP3577435B2 |
It is an object of the invention to, even in the case where transported liquid containing a sedimenting material such as slurry is used, prevent the sedimenting material from stagnating and collecting inside a suction check valve and a d...
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JP2004529284A |
A piston pump for brake systems employs a pulsation-smoothing device that functions especially well in the region of the outlet valve. As a result, substantially less noise occurs, and the durability of the piston pump is substantially b...
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JP3569267B2 |
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JP3564516B2 |
A plunger pump includes a piston which is driven for reciprocatory motion and associated with a check valve. A space within a cylinder is partitioned by a piston 1p into a first space A which communicates with a discharge port 1ep and a ...
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JP3562857B2 |
PURPOSE: To reduce Reynolds-number at a section of a cutout groove and suppress spout together with cavitation by forming a plurality of grooves extending in an spouting direction on bottoms of substantially triangular bilateral grooves ...
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JP3564362B2 |
In the pulsation damping device, a valve casing (23) in which an air supply valve (36) and an air discharge valve (43) are disposed in parallel is attached into an air chamber (20b) of a device body casing (17). An air supply/discharge v...
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JP3561845B2 |
An electrohydraulic pump load control system that includes a fluid-cooled integrated electric motor/hydraulic pump (12,14) for delivering fluid under pressure to an accumulator (20) that stabilizes pump output pressure while accommodatin...
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JP3558552B2 |
To provide a pump equipped with a pulsation buffering device which cannot be a hindrance to layout, in mounting and provide a chemical spraying machine optimumly laid out including the pump. A frame 106 of a chemical spraying machine is ...
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JP3558416B2 |
PURPOSE: To reduce pulsation of pump pressure of a pump which shows at lest two discharge pressure characteristics of different phases. CONSTITUTION: A pump showing at least two discharge pressure characteristics of different phases has ...
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JP2004230510A |
To provide a pressure fluid supply device on a machine tool which eliminates pulsation of pressure fluid supplied to a fluid pressure apparatus of the machine tool from a pressure fluid supply means and improving machining precision of a...
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JP3552464B2 |
In a high-pressure fuel pump (1), a bellows chamber communicates with a fuel tank (29). A volume chamber (36) having a predetermined volume is arranged in a return passage (26,27) which returns a fuel stayed in the bellows chamber to the...
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JP2004522900A |
Disclosure is made of a method for electronic polar attenuation of torque profile for positive displacement pumps by a processor where the attenuated torque profile is compared with the shaft displacement angle of the pump input shaft. T...
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JP3547850B2 |
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JP2004522033A |
Fluid and fuel delivery systems reducing pressure fluctuations and engines including such systems are disclosed. Such systems use a conduit that attenuates pressure fluctuations. Preferably, the conduit attenuates pressure fluctuations b...
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JP3540010B2 |
PURPOSE: To improve flow rate precision by a method wherein given correction is applied on the gear shift pattern of a produced eccentric cam by a detecting pressure and a detecting displacement amount and based on a correcting gear shif...
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JP2004183730A |
To mitigate fluid pressure pulsation generated in fluid fed by a diaphragm pump or the like.An inflow port (2) and an outflow port (3) are provided to a sealed vessel body (1). The inflow port (2) supplies fluid into the vessel body (1) ...
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JP2004176698A |
To provide a high efficiency hydraulic pump provided with a mechanism to suppress the generation of internal leakage and abnormal noises and prolong the life of the hydraulic pump, in a system to control position/thrust by combining toge...
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JP2004150402A |
To provide a pump for liquid chromatography with excellent stable liquid feeding efficiency at an extremely low flow rate and air bubble discharge efficiency at starting.In this pump 10 for liquid chromatography wherein a low pressure el...
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JP3522332B2 |
PURPOSE: To keep a delivery amount at a constant value without the occurrence of pulsation when the rotary shaft of a moving blade rotation compression type fluid machine is rotated in a constant state. CONSTITUTION: The foundation curve...
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JP2004108884A |
To provide a minute flow rate pump realizing fine flow rate liquid feeding accurately operated.The minute flow rate pump 10 is a syringe type liquid feeding pump provided with a syringe 12 and a plunger 14 for delivering a liquid in the ...
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JP2004108188A |
To ensure nonpulsation in a nonpulsating pump by performing compensation according to pulsation varying with a change in the operating condition of the nonpulsating pump.At the beginning of the discharge period Pd of a diaphragm pump con...
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JP3516966B2 |
PURPOSE: To easily and surely eliminate the pulsation of the discharge amount of a pump by dispensing with a sliding key groove of a connecting rod. and moving a small cam follower along the connecting rod through a guide rail on the cir...
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JP2004092647A |
To electronically attenuate essential variation factors of pump torque for generating motor torque output to maintain output pressure from a pump constant.Disclosure is made of a precision hydraulic energy delivery system that directly c...
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JP3509117B2 |
PURPOSE: To reduce working sound by eliminating sources generating working sound within a pump. CONSTITUTION: In the fluid pump for fluid pressure system where the fluid pump is equipped with a housing 15, a motor 11 including an one sid...
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JP3507212B2 |
PURPOSE: To provide a nonpulsating pump having a pulsation regulating mechanism which is constituted to regulate pulsation fluctuated by a pump operation condition to a minimum as low as possible during operation and have simple structur...
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JP3505962B2 |
To restrain abrasion of a seal material by preventing the shakes of a cap in a simple structure. This resonator device for a high-pressure fuel pump is mounted among a casing 18 forming a fuel passage 22, a cover 29 mounted on the casing...
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JP2004053018A |
To provide a control method for generating pressure using a booster, especially a control method for inspecting compressive strength of a pipe and allowing a simple and inexpensive constitution and long service life.One operation system ...
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JP2004044471A |
To compensate for a decrease in discharge flow rate that occurs in an early stage of a discharge stroke in a non-pulsating pump.The amount of discharge flow rate qA decreases in an early stage of a discharge stroke Pd of a diaphragm pump...
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JP3455419B2 |
To provide the subject accumulator preventing a diaphragm from deforming and damaging caused by holding foreign matter in a slight gap between the diaphragm and a plate even when the foreign matter is mixed with the fuel. A diaphragm 86 ...
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JP3447240B2 |
To damp oil pressure pulsation at low cost without providing any additional parts, without increasing the number of parts and the size, and to effectively damp oil pressure pulsation having high frequencies. Pulsation damping oil storage...
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JP3432512B2 |
A peristaltic pump comprising a rotor and a plurality of removable cartridges associated with the rotor, wherein the occlusion beds of the cartridges are configured to enable the outflow characteristics of the pump to be varied by manipu...
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JP2003193962A |
To reduce pulsation in a discharged fluid.An electromagnetic pump 1 comprises an magnetic rod 8 excited by applying a pulse current to an electromagnetic coil, an electromagnetic plunger 25 reciprocating with excitation and demagnetizati...
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JP3418425B2 |
PURPOSE: To mix two kinds of fluids at a specific ratio without pulsation by making the composite waveform of the respective flow waveforms in two pumps constant, and determining the cam shape for one other pump in such a way that the fl...
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JP3419498B2 |
PURPOSE: To perform simply the control of a swash plate inclining angle and the lubrication of a tilting shaft while the construction remains small and reduce vibrations and noises by introducing one intermediate pressure from a pluralit...
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JP2003517534A |
The invention relates to a piston engine which is essentially comprised of an engine shaft and a set of modules, each of which comprises a cylinder and a piston powered by the engine shaft in the cylinder, each module resulting in vibrat...
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JP3411071B2 |
PURPOSE: To effectively limit pulsation by forming the shape of a driving cam so as to satisfy a specific condition for additionally discharging the replenishing amount of the discharging flow rate in the case of a driving cam mechanism ...
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JP3396397B2 |
To provide a simple and inexpensive means which quickly and easily executes conformity to a different pressure level corresponding to fuel of different kind, in a fuel supply device for a Diesel engine or the like. A constitution is prov...
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JP3392879B2 |
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JP3391446B2 |
The apparatus comprises an apparatus body-forming casing (17) in which a liquid chamber (20a) temporarily storing a transfer liquid from a pump, and an air chamber (20b) are isolated from each other by an expansible pulsation restraining...
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JP2003056501A |
To suppress pressure variation with minor changes in an existing hydraulic circuit, operable over a wide pressure range and miniaturizable as compared to an accumulator. When pressure in an oil passage 11 rises, a piston 3 displaces with...
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JP3380874B2 |
A peristaltic pump includes a plurality of rollers for compressing and sealing a collapsible and resilient tube. A housing and a pump arm with a specific arcuate surface and position with respect to the housing enable the succesive conta...
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JP2003049769A |
To provide a compressor capable of a reduction in a development cost and an improvement in productivity in order to realize vibration suppression over various rotational order components. An integrally constructed damper unit 50 is mount...
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