Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7131820 | Method for controlling a thick matter pump A method for controlling a thick matter pump comprising two delivery cylinders (10) emerging, via two openings (12), into a material reservoir (14), associated with two delivery pistons (26), symmetrically synchronized relative to said cy... | 11/07/2006 |
| 6139286 | Automatic venting back pressure valve A new and improved automatic venting back pressure valve is provided in a valve body including a back pressure chamber having a fluid inlet and a fluid outlet. A spring loaded back pressure member covers the fluid outlet which is movable between a normall... | 10/31/2000 |
| 6116868 | Multi-faceted valve head for hydraulic pump A hydraulic oil tank connects to a valve head (10) which is provided with an oil return switch (2) accomodated in an oil return hole (14). An adjusting valve (3) is accomodated in an adjusting hole (13) of the valve head. An oil chamber hole (15) accomoda... | 09/12/2000 |
| 5823748 | Device for opening and closing a closure cap The invention concerns a device for opening and closing a closure cap (16) fitted over a cleaning aperture (10) in the floor of the discharge container (12) of a pump (14) for thick-bodies fluids. The cap (16) is linked to a hydraulic drive unit (20) and ... | 10/20/1998 |
| 5584671 | Apparatus for delivering fluid to a patient A fluid delivery system is disclosed which includes a pump and a fluid delivery set. The fluid delivery set includes a stop cock valve, and the pump includes a valve actuation unit into which the stop cock valve is positioned for operation of the system. ... | 12/17/1996 |
| 5277557 | Hand-held and hand-operated vacuum pump The invention is directed to a hand-operated vacuum pump and more specifically, a hand-held and hand-operated vacuum pump for obstetrical use incorporating an improved vacuum regulation system. The hand-held and hand-operated vacuum pump comprises a cylin... | 01/11/1994 |
| 5192198 | Diaphragm pump construction A diaphragm pump with a flat diaphragm which is held between the face surface of a pump head and the corresponding face surface of a hydraulic block is improved in that the annular clamping region has an angling step such that the clamped-in diaphragm is ... | 03/09/1993 |
| 5176428 | Hydraulic pump A hydraulic pump comprises at least one alternating-cycle piston (20) having a suction phase and a delivery phase, and sliding in a fixed cylinder (22). The pump possesses in addition a nonreturn suction valve (32) placed between a source of fluid under l... | 01/05/1993 |
| 4954051 | Air spring seat and air pump An air spring seat principally for buses, trucks, boats or other vehicles includes a manual air pump for inflating and deflating the air spring. The manual air pump includes a piston having a rearward air intake stroke, a forward compression stroke to del... | 09/04/1990 |
| 4834287 | Pressure relief before or upon electric shut off of pump A valve control mechanism for a paint spraying system provides for pressure relief prior to turn-off of the compressor. A pair of interlocking knobs, a pressure control knob and an off-prime-spray knob, are mechanically interlocked so that the compressor ... | 05/30/1989 |
| 4775300 | Heating oil pump for selective single or double line operation A heating oil pump which is intended for selective single or double line operation. Between the suction side and return side there is a connecting passage which, for double line operation, is closable by a closure member. The latter is displaceable upon i... | 10/04/1988 |
| 4768929 | High pressure paint pump A pump system is provided for the pressurization of liquid paint sufficient for hydraulic atomization when the paint is released through the nozzle of a spray gun. The system includes a high pressure pump with an inlet communicating with a source of liqui... | 09/06/1988 |
| 4758131 | Apparatus for displacing high viscous substances An apparatus for displacing a high viscous substance, such as grease, which comprises a positive displacement-type pump. The chamber of the pump is in communication with a second chamber defined by a tubular sleeve that is slidably displaceable on the bod... | 07/19/1988 |
| 4685592 | Pumping system with control valve A pumping system for containing and dispensing liquids, such as poisonous or hazardous chemicals and the like. The system has a spring-biased, manually-openable by pass valve incorporated therein which is selectively positionable in various positions with... | 08/11/1987 |
| 4634347 | Arrangement in plant equipment for supplying a binding agent directly to a building element The invention relates to an arrangement in plant equipment for directly supplying to a building element a binder comprising, for example, mortar of pumpable consistency and containing water. The plant equipment includes a vessel for ready-mixed binder, a ... | 01/06/1987 |
| 4446882 | Solenoid-operated valve means for hydraulic systems In an hydraulic system a solenoid-operated valve mechanism is used to control delivery of pressure fluid to a part of the system, the fluid being circulated by a pump from a reservoir through the valve mechanism and back. The valve mechanism has a solenoi... | 05/08/1984 |
| 4390324 | Pressure release valve for pumps An airless hydraulic diaphragm paint pump having a pumping chamber subdivided by a diaphragm into pumping fluid and pump fluid subchambers with an inlet from a pump fluids storage and an outlet to a pumped fluid utilizer such as a paint spray gun. A bypas... | 06/28/1983 |
| 4196828 | Manually charged fluid dispenser having a hydraulically biased charging rod A manually charged fluid dispenser includes a charging cylinder disposed in the mouth of a bottle and a manually reciprocable piston carried on a charging rod which extends out each end of the cylinder. The charging rod has a differential diameter for pro... | 04/08/1980 |
| 4017221 | Combined unloading and relief valve for pump unloading circuit A hydraulic fluid circuit comprises an engine-driven pump for communicating pressurized fluid through a combined unloading and relief valve and to an implement control circuit of a construction vehicle. Actuating means are provided for selectively opening... | 04/12/1977 |
