Quotables
"The wireless music box has no imaginable commercial value. Who would pay for a message sent to nobody in particular?"
David Sarnoff, American radio pioneer ; 1921
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7322569 | Linear drive for vibratory apparatus A two mass vibratory apparatus for processing work material includes a bed defining a transport surface for receiving the objects, an elastic amplifier having a first end connected to the bed and a second end, and a base connected to the elastic amplifier second end... | 01/29/2008 |
| 6786128 | Fluid motor A fluid motor has a rotor mounted within a housing internal space. A piston positioned within the rotor and may be mounted to an output shaft. The output shaft is driven by applying pressure difference from a fluid both across the rotor within the internal space and... | 09/07/2004 |
| 4726743 | Hydraulically driven downhole pump A hydraulically powered reciprocating downhole pump having improved means for reliable and efficient operation is disclosed in which a reversing valve (8) is hydraulically shifted past center position so as to effect a smooth continuous operation. Inlet v... | 02/23/1988 |
| 4693171 | Position responsive valve control for hydraulic cylinder A hydraulic well pump for operating a pump sucker rod string including a hydraulic cylinder assembly for raising and lowering the sucker rod string and a fluid counterbalancing system for offsetting the combined weight of the reciprocating service equipme... | 09/15/1987 |
| 4650008 | Pile driver and extractor A driving and extracting apparatus has a hammer frame within which a reaction mass is freely movable. The reaction mass is caused to reciprocate within the hammer frame by the selective application of drive pressure to opposite drive cylinders at a freque... | 03/17/1987 |
| 4388981 | Variable cylinder hydraulic vibrator and control system Apparatus for incremental cylinder length control in hydraulic seismic vibrators having increased frequency range. The vibrator apparatus (10) of the type having a reaction mass (38) and axial cylinder bore (42) utilizes hydraulically movable end sleeves ... | 06/21/1983 |
| 4284038 | Reciprocating drive means Reciprocating drive means powered by a fluid such as compressed air comprising an elongate inner member with a plurality of passageways therein, an outer member slidable on the inner member and a shuttle member slidable with respect to the inner member an... | 08/18/1981 |
| 4256014 | Piston vibrator A piston vibrator comprising a cylindrical housing having a chamber with a free floating piston therein. The free floating piston is axially moved by a pressurized medium. Piston amplifying structure is provided for regulating the effective mass of the pi... | 03/17/1981 |
| 4178838 | Oil porting system for dual cylinder vibrator A system for porting of hydraulic fluid in a hydraulically driven seismic energy vibrator of the reciprocating mass type. A mass is reciprocated relative to an earth contacting frame which includes at least two hydraulic piston rods coacting with internal... | 12/18/1979 |
| 4164264 | High pressure sealing apparatus A high pressure seal is formed between a stationary piston and a reciprocating cylinder. The seal includes a sleeve which has an inner diameter dimensioned to permit the cylinder to slide freely over the piston rod, the sleeve being in rigid contact at on... | 08/14/1979 |
| 4131397 | Pumps There is disclosed in the present application a double acting diaphragm pump including a two part hollow housing which defines two pumping chambers, one on each side of the diaphragm. A pumping stroke is imparted to the diaphragm by means of a hydraulic a... | 12/26/1978 |
| 4082032 | Control of hydraulically powered equipment A hydraulically driven hammer is disclosed, along with valve actuation arrangements which operate to switch hydraulic forces on the hammer ram after preselected intervals following application of pressurized pilot fluid flows. These flows pass into a flui... | 04/04/1978 |
| 4026193 | Hydraulically driven hammer system A hydraulic pile driving hammer system is described which requires only a single pressure operated pilot to obtain switching for reversal of hydraulic forces at both ends of its stroke.... | 05/31/1977 |
| 4020744 | Control of hydraulically powered equipment A hydraulically driven hammer is disclosed, along with valve actuation arrangements which operate to switch hydraulic forces on the hammer ram after preselected intervals following application of pressurized pilot fluid flows. These flows pass into a flui... | 05/03/1977 |
| 3939922 | Hydraulic hammer assembly A hydraulic hammer assembly is disclosed which comprises a stationary piston suspended within a tubular frame or casing and a cylinder locked inside a massive ram within the casing. The cylinder forms a differential hydraulic assembly with the piston and ... | 02/24/1976 |
