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| Number | Title | Issue Date |
| 7179064 | Reciprocating piston compressor for a gaseous medium A reciprocating piston compressor for a gaseous medium is provided having a reduced structural height. The compressor is especially for a level control system in a motor vehicle. The maximum pivot angle of the piston ring longitudinal axis relative to the longitudin... | 02/20/2007 |
| 6986651 | Pump priming apparatus A pump priming apparatus including a housing through which fluid object material may be urged to flow, the housing including an intake portion and a pumping portion downstream from the intake portion. The apparatus further includes a piston assembly carried for reci... | 01/17/2006 |
| 6926175 | Constant discharge structure for nozzle head lowering type vacuum cosmetic container Disclosed is a constant discharge structure for a nozzle head lowering type vacuum cosmetics container for containing high functional cosmetics. The constant discharge structure includes a liquid collecting chamber having a liquid inflow hole in the lower portion of... | 08/09/2005 |
| 6354820 | Pump For the purpose of providing a thin pump designed to decrease the number of parts, the pump is provided with a rectangular parallelepiped cylinder (3) and a piston located inside of the cylinder, wherein the piston (4) reciprocates and oscillates in the c... | 03/12/2002 |
| 6299419 | Reciprocating diaphragm pump with packless piston-cylinder unit This invention provides a sealing mechanism for sealing the piston-cylinder unit of a reciprocating diaphragm pump to ensure that the piston-cylinder unit is permanently and reliably sealed while being simple to assemble. The invention further provides a ... | 10/09/2001 |
| 6145625 | Grease lubricator, particularly for construction machine A lubricator for delivering grease lubricant to lubricating locations of a machine is coupled to a grease container and has a work chamber in which a delivery piston reciprocates. To ensure that a compressible medium, such as air which has been drawn into... | 11/14/2000 |
| 5971727 | High-pressure hydraulic pump with improved performance The present pump design with the elimination of a separate hydraulic fluid path from the cylinder dramatically improves the efficiency and pressure achieved by the pump by 15% as a result of reducing the number of chambers provided in the pump interior. I... | 10/26/1999 |
| 5934173 | Reciprocating plunger pump An improved reciprocating plunger pump boasting a self-aligning plunger assembly, a selectively removable plunger guide cartridge, and an improved seal cartridge assembly.... | 08/10/1999 |
| 5899675 | Pump comprising a chamber with inlet and outlet openings, a steam iron comprising said iron and a method of manufacturing said pump A pump 1 comprises a chamber 2 having a inlet opening 22 and an outlet opening 21. The chamber 2 extends between a first main wall 30 and a second main wall 40. The first main wall 30 is a triangular bottom wall of a body 3. The second main wall 40 is a p... | 05/04/1999 |
| 5876189 | Pumped fluid metering device for the precise feeding of a fluid A metering device for the precision feeding of a liquid, such as, for example, an oil lubricant. The device has a fluid supply chamber with a working medium such as oil and which in turn is in open communication with a metering chamber also containing the... | 03/02/1999 |
| 5605446 | High viscosity material pump having valved priming piston A reciprocable liquid pump having a priming cylinder affixed beneath the lower valve housing, and a priming piston rod affixed to the lower end of the pump piston valve assembly. A priming piston and priming valve are affixed to the lower end of the primi... | 02/25/1997 |
| 5407332 | High suction intake wiper In a priming piston loading double acting pump for high viscosity materials, the shovel plate assembly is formed of a flexible, abrasion resistant disk or cup. The disk may be made from silicon rubber and the cup may be made from a glass filled Teflon pol... | 04/18/1995 |
| 5207659 | Device for dispensing drops of small volume, in particular for ophthalmological care A device for dispensing of small volume comprises a pump associated with a container of the substance to be dispensed, the pump comprising: a hollow pump body; and a piston sliding inside said pump body in sealing contact with the pump body around a circu... | 05/04/1993 |
| 5144882 | Shaft seal system for a piston pump separating impurities A piston pump shaft sealing system is provided which prevents particles released from the shaft seal, as a result of wear from entering and contaminating the fluid being pumped. The system features a permeable, deformable disc disposed between the seal an... | 09/08/1992 |
| 5141414 | Piston pump for easily damaged products An improved pumping device for delicate or easily damaged products is provided with a hopper, or other system for holding the products, and at least one, and preferably two, synchronized piston pumps positioned proximate to the bottom of the hopper. The p... | 08/25/1992 |
| 5141408 | Product pumping apparatus A dual piston alternately reciprocating pumping apparatus utilizing, in part, a pressure based precompression stroke to provide product at a substantially uniform discharge pressure. In operation, a first feed piston is advanced through a first feed cylin... | 08/25/1992 |
| 5064359 | Annular support for a seal for a tilt piston An apparatus includes a tilt piston having a piston head. The piston head is reciprocally disposed within a cylindrical bore formed in a housing, the bore being oriented along an axis. A seal is mounted circumferentially about the piston head. The seal ha... | 11/12/1991 |
| 5030069 | Material moving pump A sanitary material moving pump having a ram mounted for rreciprocal movement in a pumping chamber. An elongte tubular housing is connected at one end to the ram for purposes of reciprocal movement of the ram to move material through the pumping chamber. ... | 07/09/1991 |
| 4979878 | Relieved piston valve for fluid motor and fluid pump An asymmetrical or relieved piston is provided in a fluid motor or a pump. The piston is rigidly connected to one end of the connecting rod, the opposite end of which is pivotally connected to a rotating crankshaft. The piston has a relieved upper and low... | 12/25/1990 |
| 4875833 | Pumping of high viscosity materials A vane pump in which the ports for passage of highly viscous material pumped are widely dimensioned and the clearances, in particular around the rod which carries the vane, are great. The invention applies to the pumping of materials of the type having a ... | 10/24/1989 |
| 4848213 | Reciprocating piston compressor with offset cylinder A reciprocating piston compressor of the type having the piston fixed to the connecting rod. The centerline of the cylinder is offset from the centerline of the crankshaft in a direction which reduces the maximum angle between the piston and the cylinder ... | 07/18/1989 |
| 4842495 | Non throttling discharge pump assembly A pump assembly (1) for an atomizing piston pump comprising a piston (16) slidably located in a cylinder (4), a variable volume fluid storage chamber (5) in communication with the cylinder on one side of the piston, means (18) for varying the volume of th... | 06/27/1989 |
| 4809731 | Liquid injection apparatus having an external adjustor A liquid additive injection pump has a hydraulic motor comprising a differential piston assembly reciprocable in a housing under the urging of a primary liquid into which an additive is to be injected. The piston assembly includes valves to effect the tra... | 03/07/1989 |
| 4726747 | Thrust piston pump for active substance dispenser A thrust piston pump for an active substance dispenser has two equiaxial, position-rigid, interconnected pistons running in the same direction, namely a pump piston passing in and out of an otherwise closed pump chamber and a larger presuction pistion loc... | 02/23/1988 |
| 4693675 | Non-throttling discharge pump A discharge pump for expelling fluid from a container comprising a pump chamber, aligned plungers disposed in said pump chamber movable in reciprocation therein and in unison and relative to each other to alternately trap a charge of fluid therebetween, i... | 09/15/1987 |
| 4679989 | Pump shovel bulk unloader An air-operated reciprocating pump is designed for use with a wide variety of materials having widely varying viscosities. The pump has a stroke which is adjustable so that the piston can operate either entirely within the cylinder or can extend out the b... | 07/14/1987 |
| 4637295 | Pump seal with curved backup plate A pump seal is provided for use in a pump suited to move high viscosity and abrasive materials. A piston in the pump has a substantial amount of clearance relative to the cylinders in which it operates with the seal providing substantially the only contac... | 01/20/1987 |
| 4561828 | Pump for forwarding liquids A pump for forwarding liquids is described which has at least one pump chamber with inlet and outlet valves and also a plunger which periodically varies the volume of the pump chamber. To avoid the problems of dry running with very rapidly running pumps, ... | 12/31/1985 |
| 4523903 | Dosing pump A dosing pump (1) is created allowing to accurately dose a medium to be dosed as a function of time or of a flow rate. The dosing pump (1) utilizes a predelivery obtained by a diaphragm (11) as well as a piston-cylinder-pump for dosing. The pump cylinder ... | 06/18/1985 |
| 4515537 | Dosing pump A dosing pump (1) is produced, with which a precise dosing is possible as a function of the time or of a flow rate. The dosing pump (1) operates with a preliminary transport obtained by means of a diaphragm (11). The stroke volume of the diaphragm (11) is... | 05/07/1985 |
| 4413957 | Portable, hand held, high pressure pump A hand carried, motor driven pump which will pump at high or low pressure, depending upon the size of the plunger used. The pump is used for high pressure lubricant, up to 9,000 lbs., to a high volume of fluid, such as Diesel oil, water and the like at lo... | 11/08/1983 |
| 4290737 | Ram type pump A ram type pump is disclosed for pumping manure from a collection area to a storage area. The pump has a hollow cylindrical housing having a transfer portion and an actuator portion. Manure is pushed through the transfer portion by a reciprocating cylindr... | 09/22/1981 |
| 4139122 | Dispensing pump having no check valves A dispensing pump having no check valves includes upper and lower mechanically-joined pistons which are moveable together through respective upper and lower cylinders. As the pistons are moved in one direction toward a rest position the cylinders are init... | 02/13/1979 |
| 4106534 | Apparatus for placing comestibles in dispensing mechanism A barrel filler is provided for facilitating, filling and compacting of comestibles, such as cookie dough or the like in a dispensing mechanism for extruding the comestibles. The barrel filler is designed for placing comestibles in a dispensing mechanism ... | 08/15/1978 |
| 4053902 | Fluid pump for a writing device A pump mechanism for delivering ink or the like writing fluid from a reservoir to a point of utilization such as a writing device. The mechanism includes a piston slidable in a cylinder for drawing ink into the cylinder during a suction stroke and dischar... | 10/11/1977 |
| 4047854 | Metering piston pump with piston-carried distributor for viscous fluid A material dispensing and metering piston pump comprising, in combination, a piston cylinder, an inlet defined in said cylinder for material to be dispensed, and an outlet defined in said cylinder for the said material, the inlet and the outlet being axia... | 09/13/1977 |
| 4035109 | Pump for fluent, and especially heavy and abrasive materials A pump for fluent materials, and especially suitable for heavy and abrasive materials, has a piston in substantial clearance relation within a cylinder and operable in a pumping stroke to drive into a combination valving, wiping and sealing elastomeric ri... | 07/12/1977 |
| 4029442 | High pressure piston pump and wiper, sealing, valving structure A high pressure piston pump especially suitable for moving heavy high viscosity and abrasive materials, which has its piston in substantial clearance relation in a cylinder, is operable in a pumping stroke to drive into a flexibly deflectable, elastic com... | 06/14/1977 |
| 4028017 | Manure pump having agitator piston A hopper having a bottom opening into an open topped chamber portion of a housing which defines a discharge passageway leading from the chamber to a discharge end portion. A piston is mounted for reciprocatory movements in the chamber portion and passagew... | 06/07/1977 |
| 4021153 | Liquid metering pumps This invention relates to liquid metering pumps and according to the invention such a pump comprises a cylinder permanently connected to an inlet passage for the liquid and in which said cylinder a plunger piston is arranged to slide said piston co-operat... | 05/03/1977 |
