Celebrity Inventors
Actor Marlon Brando has four patents, all named "Drumhead tensioning device and method."
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 |
| 7188481 | Adjustable damper actuator An actuator for controlling the position of a damper. It is an adjustable damper actuator that can actuate a damper to have positions that are other than fully open and fully closed. The actuator has adjustable stops for attaining a partially closed or partially ope... | 03/13/2007 |
| 6959546 | Method and apparatus for energy generation utilizing temperature fluctuation-induced fluid pressure differentials A method and apparatus for producing energy is provided for generating renewable energy. Captive compressed fluid cycles between two coupled containers through a motive power source. The captive compressed fluid flows between the containers in response to a differen... | 11/01/2005 |
| 6957567 | Method and system for the controlled application of fluid pressure to a load, especially for pressure testing pipe A method and system for the controlled application of fluid pressure of a load, such as a large pipe to be pressure tested utilized small pressure converters which are operated by a common controller at the hydraulic side to fill and pressurize the pipe. One pressur... | 10/25/2005 |
| 6076349 | Hydrostatic automotive or high speed steering system A full fluid-linked steering system, especially for use in on-highway steering, in which the system includes a fluid controller (21) including a fluid meter (65) operable to provide follow-up movement to controller valving (87,89), in response to the flow... | 06/20/2000 |
| 5284083 | System for powering the driving actuator of an aircraft undercarriage The invention relates to a system for powering the driving actuator of an aircraft undercarriage, the system including a hydraulic generator capable of delivering fluid under pressure to one or the other of two chambers of the driving actuator. According ... | 02/08/1994 |
| 4759256 | Tensioner recoil control apparatus Apparatus for controlling fluid communication with a fluid pressure system includes parallel flow paths connected to the system. A first flow path includes first valve apparatus for selectively closing the flow path. The second flow path includes relief v... | 07/26/1988 |
| 4715264 | Piston and cylinder unit The invention relates to piston and cylinder unit with a regulating valve for controlling the speed of the piston. The regulating valve has an open position in which it allows free passage of a fluid to the piston and a choking position in which it reduce... | 12/29/1987 |
| 4647004 | Pneumatic-hydraulic actuator system An actuator system is disclosed which modulates a linear output shaft associated with a working control valve or the like in response to a control signal input. The system includes a feedback control link, a pneumatic positioner, a pneumatically controlle... | 03/03/1987 |
| 4610599 | Apparatus for controlling a hydraulic turbine An apparatus for controlling a hydraulic turbine is disclosed comprising a hydraulic circuit to control the positioning of turbine runner blades and a hydraulic circuit to control the positioning of turbine wicket gates. The runner blade hydraulic circuit... | 09/09/1986 |
| 4524582 | Control system for hydraulic presses A control system for controlling the movement of the slide of a hydraulic press of the type having a main cylinder containing a piston mounting the slide. The control system comprises an electronic processor, a pressure transducer to measure the pressure ... | 06/25/1985 |
| 4463656 | Pneumatic motor drive For supplying a compressible driving fluid, preferably air, under pressure from a source to a motor of the kind comprising a housing, in which a body is reciprocable between predetermined end positions while dividing the interior of the housing into two c... | 08/07/1984 |
| 4386555 | Hydraulic cylinder cushion device The disclosure is directed to a hydraulic cylinder with an improved cushion device thereon to enhance the operational characteristics thereof. A cushion pin is affixed to the cylinder piston by a cap screw in such a manner that the cushion pin can float a... | 06/07/1983 |
| 4373424 | Hydraulic booster A hydraulic system in which pressurized fluid fed from a hydraulic pump is distributed through a distributor valve, on one part to a hydraulic booster for a brake and on the other part to a power steering unit or other hydraulic device. The distributor va... | 02/15/1983 |
| 4364301 | Vacuum actuator A vacuum actuator for connection to a vacuum source, the actuator utilizing a diaphragm combination having three stable positions. An annular diaphragm, having its outer periphery fixed in a housing, has its inner periphery secured between two movable ann... | 12/21/1982 |
| 4311083 | Absolute-control numerical hydraulic actuating device An absolute-control numerical hydraulic actuating device with display of the output position, comprising a hydraulic jack, a distributor formed with orifices and a selector connected to the orifices in order to make the required hydraulic connections for ... | 01/19/1982 |
| 4295533 | Pneumatically operated ram borer A self-driven pneumatically operated ram borer for boring holes in the ground includes a casing containing a percussion piston and a control sleeve for controlling the supply of compressed air through a hose to cause the piston to reciprocate, is provided... | 10/20/1981 |
| 4248133 | Impact mechanism An impact mechanism operated with gaseous fluid under pressure fed from a source of fluid having a casing with an inner cylindrical space. A piston is accommodated for reciprocation within the cylindrical space of the casing to divide the space into a wor... | 02/03/1981 |
| 4215844 | Valve actuator system A pneumatic-hydraulic proportional valve actuator system is provided having a relatively simple and adjustable means of achieving two stroking speeds by the hydraulic actuator, high speed in normal operation and low speed for small position adjustments an... | 08/05/1980 |
| 4194434 | Device for controlling a longitudinally movable driving means A device for controlling both the displacement of, and the transmittal of force by, a longitudinally movable driving apparatus comprising a piston rod which is hydraulically movable inside a cylinder, an emitter and receiver for ultrasonic waves, which ar... | 03/25/1980 |
| 4128044 | Method of controlling apparatus and servoactuator therefor A novel electropneumatic servoactuator utilizing a fluid pressure control signal chamber and a duty-cycle control valve alternating between a fluid supply pressure port means and port means venting the chamber to the atmosphere and controlling fluid press... | 12/05/1978 |
| 4114513 | Step-by-step controlled servomechanism A step-by-step controlled servomechanism of the type comprising a drive element movable provided with a plurality of receiver ports, and a fixed distributor to supply said receiver ports and having a number of transmitter ports capable of being connected,... | 09/19/1978 |
| 4084487 | Pulse motor in a nut runner A non-impacting nut running pneumatic tool in which torque pulses are transmitted by an oscillating air motor through a one-way clutch and reduction gearing to the work. A torque responsive cam clutch member responds to a predetermined delivered torque to... | 04/18/1978 |
| 4038907 | Stroke limiting mechanism with fail-safe feature A stroke limiting mechanism is connected with the movable member of a hydraulically operated machine to precisely position the movable member. The flow circuit for the stroke limiting mechanism is connected in such a manner that even if an equipment failu... | 08/02/1977 |
| 4019585 | Combined automatic and manual hydraulic control for motor grader blade There is disclosed a hydraulic control system including body automatic and manual control for controlling the position of a grader blade for a motor grader. The hydraulic system is supplied fluid from a single pump and is provided with means to isolate th... | 04/26/1977 |
| 4014248 | Servomechanism controlled step by step Step by step controlled servomechanism of the cylinder-type comprising a drive element movable in a case which it divides into two chambers and provided with a plurality of receiver ports, a distributor adapted to be put in communication with the high pre... | 03/29/1977 |
