Class / Patent application number | Description | Number of patent applications / Date published |
091415000 | DIFFERENTIAL | 6 |
20100269685 | HYDRAULIC MACHINE, IN PARTICULAR HYDRAULIC MOTOR, WITH A RECIPROCATING MOVEMENT, AND DIFFERENTIAL PISTON FOR SUCH A MACHINE - Hydraulic machine, in particular hydraulic motor, comprising a casing, a differential piston ( | 10-28-2010 |
20140137731 | DIFFERENTIAL CYLINDER FOR A HYDROMECHANICAL DRIVE FOR ELECTRICAL CIRCUIT BREAKERS - A differential cylinder for a hydromechanical drive for actuating an electrical switch, for example a high-voltage switch, is disclosed which includes a first pressure region for applying a working pressure, a second pressure region, and a piston which is capable of moving in a movement region and which is movable depending on a pressure difference between the first and second pressure region. A damping device is provided which, in the event of a movement of the piston in the direction of the second pressure region, provides damping with respect to the movement of the piston in a section of the movement region, wherein the damping is adjustable. | 05-22-2014 |
20150059568 | HYDRAULIC CONTROL CIRCUIT WITH REGENERATION VALVE - A hydraulic circuit for controlling a component of a hydraulic machine includes an actuator having a head end chamber and a rod end chamber, the actuator having an extended position for moving the component in a first direction and a retracted position for moving the component in a second direction. The hydraulic circuit includes a regeneration valve having an open position for fluidly connecting the head end chamber to the rod end chamber, a first control valve having a first open position, a second open position for fluidly connecting the regeneration valve to the return tank and substantially fluidly the rod end chamber from the fluid source, and a closed position, and a second control disconnecting valve having a first open position, a second open position, and a closed position for substantially fluidly disconnecting the rod end chamber from the fluid source. | 03-05-2015 |
091416000 | Opposing pressure applied by bypassing | 1 |
20150053074 | Fluid-Pressure Drive Device for Circuit Breaker - The drive device includes: a contact including a moving contact and a stationary contact; a rod connected to the moving contact; a piston which is connected to the rod and is slidably installed in a cylinder and which opens and closes the contact; a fluid pressure source for pressure-feeding a working fluid; and a control valve for driving the piston. In the drive device, the piston forms a partition between a supply pressure chamber communicated with the fluid pressure source and a small pressure-receiving area chamber which are on the moving contact side of the piston and a cylinder control chamber on the opposite side of the piston, and the control valve controls supplying and discharging the working fluid to and from the cylinder control chamber. | 02-26-2015 |
091417000 | Motive fluid constantly applied to one working member face (235) (321) | 2 |
20110005385 | TWO PORT - THREE POSITION ACTUATOR - An hydraulic actuator with a housing having two ports (A, C) that selectively receive pressured fluid to move a piston ( | 01-13-2011 |
20150053075 | REVERSIBLE HYDRAULIC PRESSURE CONVERTER EMPLOYING TUBULAR VALVES - The reversible hydraulic pressure converter ( | 02-26-2015 |