Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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| Number | Title | Issue Date |
| 7384249 | Fluid metering system A fluid metering system includes a housing having a piston chamber with first and second spaced ends, at least one housing inlet passage, and at least one housing outlet passage. The housing inlet and housing passages communicate with the piston chamber. A piston is... | 06/10/2008 |
| 7299740 | Reciprocating axial displacement device A reciprocating axial displacement mechanism is disclosed generally comprising a housing, a rotating device, a displacement device having first and second undulating surfaces disposed in the housing, and a cam connected to the rotating device and disposed between th... | 11/27/2007 |
| 7159507 | Piston pump useful for aerosol generation A piston pump delivers precise and repeatable volumes of a fluid from a reservoir to a downstream component, and includes a piston that is rotatably and reciprocally mounted within a cylinder. The outer periphery of the piston forms an interference fit with the inne... | 01/09/2007 |
| 6575078 | Fluid motor having fluid actuated advancing elements to advance an advanceable part of the fluid motor relative to a stator part of the fluid motor A fluid motor includes a plurality of fluid actuated pistons 13 extending radially outwards from a stator and each having a cam follower bearing 14 at its outer end. A rotor surrounds the stator and includes an inwardly facing drive cam profile engaged by... | 06/10/2003 |
| 5961303 | Positive displacement dispensing pump system This disclosure describes a pump that dispenses controlled amounts of flowable material by computer controlling both the displacement and angular position of the piston with servomechanism means. The system includes container means to hold a supply of flo... | 10/05/1999 |
| 5613839 | Variable rate pump A variable rate pump including a distributor member rotatable within a sleeve. The distributor member is provided with a bore within which a pumping plunger is reciprocable under the influence of a first cam lobe and a second cam lobe. A valve is provided... | 03/25/1997 |
| 5601421 | Valveless double acting positive displacement fluid transfer device A valveless, double acting, positive displacement fluid transfer device is operable either as a pump when driven by a power source, or as a motor when the fluid working portion is driven by fluid under pressure through the inlet and outlet ports of the de... | 02/11/1997 |
| 5482448 | Positive displacement pump with concentrically arranged reciprocating-rotating pistons A valveless positive displacement pump having pistons that undergo both rotating and reciprocating motion. The assembly comprises a radially outer, ported first cylinder with an axially outer, closed off end, a radially intermediate combination element ha... | 01/09/1996 |
| 5312233 | Linear liquid dispensing pump for dispensing liquid in nanoliter volumes A rotary/reciprocating liquid dispensing pump for dispensing liquids in the nanoliter range has a narrow radial slot extending longitudinally from an end of a reciprocating, rotating cylindrical piston sliding in a smooth cylindrical bore of a pump housin... | 05/17/1994 |
| 5236314 | Oil pump device for a chain saw An oil pump device for a chain saw comprises a drive unit having a drive shaft and a gear fixed to the drive shaft and meshing with a worm gear fixed to a power output shaft of an engine. The oil pump device also comprises a pump unit having a pump casing... | 08/17/1993 |
| 5102310 | Axial piston pump The periodic axial movement of the rotary piston (6) is performed by a cam mechanism which has a cam surface (8) rotating around the piston axis and a cam follower (9) that is in functional connection with the cam holder. The relative position of the cam ... | 04/07/1992 |
| 5020980 | Valveless, positive displacement pump including hinge for angular adjustment A valveless, positive displacement pump including a living hinge for angularly adjusting a pumping head with respect to a rotatable drive member is provided. The pump includes a block to which a pumping head and drive member are mounted. The block include... | 06/04/1991 |
| 5015157 | Pump with multi-port discharge A valveless, positive displacement metering pump is provided which is capable of either mixing two or more fluids or dividing a fluid from an inflow line into two or more outflow lines. The pump includes a housing which contains a cylindrical working cham... | 05/14/1991 |
| 5000668 | Distribution-type fuel injection pump In a distribution-type fuel injection pump, a fuel supply passageway, through which a feed pump and a fuel pressurizing chamber communicate with each other, is isolated from a cam chamber and bypasses the same. In order to simplify the construction, the f... | 03/19/1991 |
| 4904163 | Oil regulating pump for lubricating engines and method of controlling thereof An oil regulating pump for supplying oil to an engine, comprises: a pump housing provided with a suction route and a discharge route; a driving shaft inserted into said housing and rotated by the engine; a primary plunger rotated by the driving shaft; a s... | 02/27/1990 |
| 4854837 | Rotary actuated pump or motor A rotary pump or motor is disclosed which includes a housing which defines a substantially cylindrical cavity having a central axis. A pair of stators are secured at each end of the cylindrical cavity and each stator has a cam surface defined by at least ... | 08/08/1989 |
| 4801253 | Oil pump Instead of a hand-operated oil pump for supplying extra oil to the chain of a motor saw, two pumps according to the invention are disposed on the same shaft. The first one works always, while the second one can be switched on and off. The switching is eff... | 01/31/1989 |
| 4711221 | Fuel injection pump A fuel injection pump for internal combustion engines having a pump piston defining a pump work chamber and having control of the injection quantity by the opening, during the compression stroke of the pump piston, an axially displaceable regulating slide... | 12/08/1987 |
| 4141329 | Internal combustion engine fuel injection system A fuel injection system is disclosed for an internal combustion engine having at least one cylinder and a piston operating therein to define with the cylinder head a combustion chamber wherein air is compressed while the piston is moving to one end of its... | 02/27/1979 |
| 4067668 | Valveless rotary-oscillating double-acting piston pump In a pump comprising a first member provided with a circularly cylindrical cavity in which cavity a circularly cylindrical piston-like second member is arranged with rotating fit, the end surfaces of said second member being inclined to the axis of said m... | 01/10/1978 |
| 4008003 | Valveless positive displacement pump There is disclosed a valveless positive displacement pump having a cylinder with a piston reciprocal and rotatable therein and dividing the cylinder into two working chambers. Inlet and outlet ports communicate with the working chambers and the piston has... | 02/15/1977 |
| 3998569 | Apparatus for use as a gas compressor or gas blower A gas compressor or blower comprising a cylinder having gas intake and exhaust ports; a piston which is rotatably and reciprocably movable in the cylinder; valve means for admitting gas into and exhausting air from at least one chamber lying to one side o... | 12/21/1976 |
| 3930762 | Apparatus for use as a gas compressor or gas blower A gas compressor or blower comprising a cylinder having air intake and exhaust ports; a piston which is rotatably and reciprocably movable in the cylinder; valve means for admitting air into and exhausting air from at least one chamber lying to one side o... | 01/06/1976 |
