Matches 1 - 50 out of 70 1 2 >


Match Document Document Title
7938994 Method of controlling an injection molding machine  
In a method of controlling an injection molding machine M which controls specified operational processes in a molding cycle by variably controlling the rotation speed of a driving motor 3 in a...
7757599 Sealing arrangement for relatively movable parts and device including such a sealing arrangement  
A sealing arrangement for two relatively movable first and second parts and including a sealing ring positioned in a groove on one of the parts for sealing contact against the other one of the...
7198135 Lifting device, especially lifting platform for motor vehicles  
A lifting platform for motor vehicles has at least one extendable lifting column that is formed by a tubular jacket and a lifting cylinder unit arranged at least partially therein. The upper end of...
6568925 Abrasive liquid pump apparatus and method  
An abrasive liquid pump having a pump housing and a piston component configured for slidable movement within the pump housing. The pump housing has a bottom housing portion with a bottom end and a...
6176171 Fuel injection pump with precipitate inhibiting features  
A fuel injection pump with precipitate inhibiting features includes a pump body that defines a flushing fluid inlet and a flushing fluid outlet that open into a plunger bore. A plunger is...
5490766 Precision small displacement fluid pump  
A fluid pump for displacing a small, precise volume of fluid for each pump stroke, particularly where the fluid to be displaced is a liquid containing dissolved gas. The precise volume of fluid to...
5249423 Master cylinder  
A master cylinder includes a second piston that is provided with a hollow portion. The hollow portion includes a yoke portion for receiving an end of the second return spring, a cylindrical portion...
5145339 Pulseless piston pump  
A multiple piston cylinder reciprocating pump is provided with a cam drive such that the sum of the velocities during the pumping strokes of all of the cylinders is generally constant. The leak...
5140905 Stabilizing gas bearing in free piston machines  
In a free piston engine, to reduce dynamic loads on the reciprocating elements caused by a time varying pressure gradient across the gas bearing and close clearance seals provided therein, drain...
5129790 Plunger pump  
A plunger pump for supplying solution in accordance with an extrusion action of a plunger within a pump chamber. The plunger pump includes a cleaning chamber sealed by a seal member around and...
4965042 Inherently flushing piston rod for a reciprocating pump  
An inherently flushing piston rod is provided for use with a reciprocating pump. A piston rod having a rod portion and a piston portion is mounted for reciprocating movement within the housing of...
4963077 Profiled plunger for a reciprocating pump  
A profiled plunger is provided for use with a reciprocating pump. A flushing chamber and a main pumping chamber of a reciprocating pump are connected by a connector having an aperture, the...
4833976 Sealing means for a high pressure axial piston pump  
The axial piston pump is provided with two annular seals mounted in the housing and sealingly engaging the piston to define a sealing fluid zone therebetween. An annular ring is provided between...
4832352 Piston rod seal  
This invention relates to a piston rod seal in which the rod along which leakage should be avoided is surrounded by a gland of a plastically deformable material. The gland is mounted at the high...
4696223 Pneumatic pressure actuator  
A pneumatic pressure actuator including a cylinder assemblage having a pair of metallic cylinder heads and a fiberglass cylinder casing held together by a plurality of tie bolts and nuts. A piston...
4691620 Self-flushing fluid seal assembly  
A self-flushing fluid seal assembly is provided to prevent particle intrusion into the main seal around a slurry pump shaft. The assembly includes an annular tube concentrically disposed about the...
4685382 Cylinder-piston combination, particularly for high-pressure application  
A deformable sealing member, particularly a sealing tube, which is at least partially elastic is secured at two distant locations to two working members, e.g. to a piston part and a cylinder part,...
4671743 Piston pump  
In the case of piston-machines and in particular those having an elastically deformable sealing tube between the piston and the cylinder, which causes a relatively large structural length of the...
4583921 Plunger pump  
A pump which operates with several plungers is described with the plunger preferably being actuated via an eccentric drive unit and, having regard to the particular volume of flow per unit time,...
4572056 Plunger or floating piston pump  
The present invention relates to a plunger or floating piston pump which is particularly adapted for use as a small-size metering pump in performing chemical analyses. In a pump head casing there...
4519753 Displacement pump suitable for pumping suspensions  
A hydraulically-driven pump of the displacement type intended particularly for pumping various suspensions of liquids and solid particles (slurry) and/or for high pumping pressures comprises a pump...
4472111 Apparatus for generating high pressure fluid  
The present invention comprises an apparatus for producing high pressure fluid by means of a cylinder having a reciprocatingly sliding ram inside, suction and pressurization of the fluid being...
4456439 High pressure plunger pump  
A high pressure plunger pump, in particular for forwarding water and water with additives, comprises a plurality of plungers 20 which are driven by a crankshaft journalled in a drive housing 10....
4453454 Mud pump liner and piston cleaner  
In a mud pump liner and piston cleaner a split ring-type tubular reservoir, supplied with fluid under pressure, substantially surrounds the end portion of a liner projecting out of a mud pump...
4449897 Single-acting piston pump having two heads  
A single-acting piston pump for output connection to a high pressure manifold and to an input of slush or slurry. The forward head of the piston pump is mounted for contact with the slush or...
4424739 Cylinder piston unit  
Apparatus including an elastomeric hose arranged alternately to stretch longitudinally and then contract in operation of the apparatus, and a contact member disposed so as to be in sliding contact...
4422368 Cylinder-piston arrangement  
A relatively movable piston and cylinder are joined by an elastic sealing element which engages the piston and cylinder at spaced locations and at least partially defines a working chamber. The...
4384510 Method and device for feeding lubricant to a cylinder-piston arrangement  
The method and the device for the lubricant feed works by introduction of the lubricant into a clearance volume (3b) between a, for example, tubular flexible sealing element of a cylinder-piston...
4321856 Diaphragm pulser  
In a pulser for transmitting the reciprocating motion of a piston to a fluid contained in a chamber such as a solvent extraction column, at least one pulsation diaphragm having the shape of a...
4266468 Control cylinder with removable piston  
The cylinder has an open-ended longitudinal bore. A removable plug closes one end of the bore. A power piston is slidably mounted in the bore. A pressure inlet port admits pressure fluid into the...
4251081 Piston rod seal  
Piston rod sealing means of the type in which oil is applied to the low pressure side (5) of the seal and used to prevent escape of high pressure gas between the piston rod (6) surface and a...
4233886 Sealing device for hydraulic piston mechanism  
A sealing device for a high pressure hydraulic piston mechanism in which the gap between the cylinder in which the piston is slideable to pressurize delivery fluid therein is sealed by sealing...
4205946 Slurry pump system - method for preventing slurry from entering water pumping fluids  
A pumping system comprising a chamber having a movable separator positioned therein, means for forcing the separator towards a first fluid on one side of the separator when a second fluid on the...
4186654 Recirculating lubrication system  
Improved lubrication system for multiplex pumps including lubrication reservoir means, pump means, filtration means and valve means.
4157057 Single acting piston  
A single acting pump has a piston with an elastomeric and synthetic fabric seal ring and is provided with means to supply fluid to the piston and passages in the piston for circulating fluid to...
4146237 Sealing device for Stirling engine piston rod in which no separation of oil and gas is necessary  
In Stirling engines the high pressure of the cycle requires special seals on the piston rod to prevent leakage of gas out of the high pressure cylinder into lower pressure regions such as a...
4140044 Long stroke, large bore, low friction hydraulic actuators  
A large bore, long stroke, low friction, hydraulic actuator having dual hydrostatic bearings permitting elastic deformation of the piston rod while inhibiting metal to metal contact between either...
4086029 Method and apparatus for flushing the plunger of a positive displacement pump  
A method and apparatus for flushing the plunger of a positive displacement pump which handles a suspension of abrasive particles. Flush liquid is introduced at two or more locations to the packing...
4084925 Oil well pump with self-contained lubrication  
The oil well pump includes upper and lower seals at the upper and lower end portions of a plunger reciprocable within the pump barrel. Passages are provided in the wall of the plunger for...
4073217 Device enabling the immobilizing of a piston in its cylinder  
A hydraulically or pneumatically controlled device for locking a piston in he bore of its cylinder at any point of its stroke, comprises, mounted on the piston, fluid-tight seals, a series of...
4055107 Apparatus for removing fluid in a piston cylinder assembly  
This disclosure relates to an apparatus for use with a piston cylinder assembly and includes one or more rod scraper elements employed for the removal and retention of any fluid adhering to the...
4032264 Closed-type electromagnetic compressor  
In a closed-type compressor with an electromagnetic reciprocating drive, reliable and stable collimation of the electromagnetic driving part with the compressive pumping part is easily established...
4024801 EXTENDED INSULATED HOT HEAD PISTON WITH EXTENDED INSULATED HOT CYLINDER WALLS  
This invention relates to reciprocating piston engines using single acting pistons operating in liquid cooled and lubricated cylinders, said pistons have piston extensions slightly smaller in...
4023469 Piston and piston rod construction for pumps and method of flushing piston-type pumps  
A piston and piston rod construction for use in a double-acting reciprocating pump, and a method of flushing a piston-type pump. The piston has spaced apart rubbers mounted on a body intermediate...
3994626 Pump apparatus  
Systems, apparatus and methods are disclosed for disposing of radioactive waste materials by placing them into a container such as a steel drum, together with cement or other solidifying agent and...
3983788 Method to minimize the amount of oil in the air exhausted from a pneumatically operated impact motor and an impact motor for carrying out this method  
An impact motor has a reciprocating piston that has its piston rod guided in bushings in the housing. The bushings are lubricated by oil-loaded compressed air but the piston is forced to...
3887305 RECIPROCATING PUMP  
A reciprocating pump comprising: a cylinder having a discharge check valve in the neighborhood of an end thereof; a diaphragm or a bellows forming a diaphragm chamber with a recess at the other end...
3847062 PLUNGER AND CYLINDER ARRANGEMENT  
A fluid-bearing plunger and cylinder arrangement comprises a cylinder, a plunger member closely fitted within the cylinder for reciprocation therein, said cylinder defining a pressure chamber...
3832935 PISTON CYLINDER ENGINE WITH PRESSURIZED PISTON ROD SEAL  
To seal the piston rod through an end wall of the cylinder, the piston rod is formed with a bore in which a sealing packing is located. In the wall, between the bore and outside surface of the...
3818807 SLURRY PUMP PISTON SEAL  
In a slurry pump pumping cylinder, a system for liquid-sealing of the pumping cylinder head with respect to the interior walls of the pumping cylinder. Particularly, a pair of spaced apart...
Matches 1 - 50 out of 70 1 2 >