Class / Patent application number | Description | Number of patent applications / Date published |
060494000 | Including by-pass or restrictor controlling flow circuit | 10 |
20080245067 | HYDROPNEUMATIC PRESSURE TRANSMISSION DEVICE - A hydropneumatic pressure transmission device having a working piston and a transmitter piston for pressure transmission to the working piston is proposed, with the working piston being guided in a housing space in such a way that, coupled to the movement of the working piston, hydraulic fluid must flow from a first region via a first connecting section into a second region. According to the invention, a switchable second connecting section is provided so as to be connected parallel to the first connecting section. | 10-09-2008 |
20080282692 | Hydraulic Controller Arrangement - What is disclosed is a hydraulic controller arrangement for the pressure medium supply of a hydraulic consumer, e.g., of the rotating gear of a mobile work machine. At low pressure medium flow rates, the pressure medium flow rate draining from the consumer is backed up by means of a drain backup valve having the form of a pressure limiting valve and throttled accordingly, so that a back pressure is generated which is capable of preventing an advance of the mass actuated by the hydraulic consumer. | 11-20-2008 |
20090165453 | Method for supplying a fluid to a transmission component - A method for supplying fluid to a transmission component such as a transmission control unit, a transmission lubricating system, and/or a transmission cooling system. The transmission is an automatic transmission of a motor vehicle having a hydraulic actuating system. A hydraulic medium is drawn from a region within the interior of a transmission case by a positive displacement pump, and the region of the transmission case from which the positive displacement pump draws the hydraulic medium is subjected to an overpressure that is somewhat greater than the ambient pressure around the transmission case. | 07-02-2009 |
20110283694 | STEERING SYSTEM WITH DYNAMIC SLIP REDUCTION - A steering system includes a fluid motor and a steering unit. The steering unit is in fluid communication with the fluid motor. The steering unit includes a fluid meter adapted to meter fluid to the fluid motor in response to actuation of the steering unit. A valve housing is in fluid communication with the fluid meter. The valve housing defines a valve bore. A valve assembly is disposed in the valve bore. The valve assembly defines a primary fluid path to the fluid meter and to the fluid motor from the fluid meter. The valve assembly further defines a secondary fluid path to the fluid motor that bypasses the fluid meter. An amount of fluid through the secondary fluid path is based on volumetric efficiency of the fluid motor. | 11-24-2011 |
20110296824 | HYDROSTATIC TRANSMISSION BY-PASS MECHANISM - A bypass pin for a hydrostatic transmission is disclosed. The hydrostatic transmission has a hydraulic pump. The bypass pin has a head positioned at one end of a shaft. The bypass pin also has a tip positioned at an opposite end of the shaft. The bypass pin is configured to receive a linear force exerted against the head in a first direction which causes the bypass pin to move in the first direction. The shaft of the bypass pin is configured to be positioned through a casing containing the hydrostatic transmission. The tip is configured to contact a rotating member in the hydraulic pump when the rotating member is in contact with a fluid directional member, the tip pushing the rotating member away from a fluid directional member in the first direction when the linear force is applied. | 12-08-2011 |
20120210708 | WATER METER - A meter includes an inlet for receiving a fluid and a housing defining a cylindrical chamber receiving the fluid from the inlet, wherein a chamber axis passes through a center of the cylindrical chamber. The meter also includes an outlet coupled to the housing, wherein the outlet is axially aligned with the inlet along a flow axis, and the flow axis does not intersect the chamber axis. | 08-23-2012 |
20120291428 | Hydraulic System for Lifting a Crane on a Vehicle - A hydraulic manifold system for lifting, installing, or repairing large industrial field equipment. The system includes a hydraulic motor, which is fluidly connected to a hydraulic line of a vehicle, which is drivingly connected to a high-pressure hydraulic pump and fluidly connected to above-ground jack, ram, or lifting device. An above-ground jack, ram, or lifting device is hydraulically actuated by the fluid supplied by the hydraulic pump wherein a remote electronic controller can be utilized to provide a signal in order to depressurize the auxiliary device using an electronically actuated valve. | 11-22-2012 |
20140230425 | HYDRAULIC CIRCUIT FOR RAM CYLINDER - A hydraulic circuit for a ram cylinder includes: a ram cylinder which drives a driven device; a hydraulic unit including (i) a supply circuit which includes a supply control valve and a supply throttle valve, and (ii) a discharge circuit which includes a discharge control valve and a discharge throttle valve; and a first supply/discharge circuit which connects the ram cylinder with the supply circuit of the hydraulic unit, and a second supply/discharge circuit which connects the ram cylinder with the discharge circuit of the hydraulic unit. A bypass circuit having an opening/closing function connects a portion downstream from the supply control valve and the supply throttle valve with a portion downstream from the discharge control valve and the discharge throttle valve, and the bypass circuit allows the first and second supply/discharge circuits to serve a plurality of functions. | 08-21-2014 |
20150292527 | PRESSURE-BALANCE VALVE FOR BALANCING FLUID FEED TO ACTUATOR CYLINDERS OF A SERVO-CONTROL FOR CONTROLLING ROTOR BLADES OF A ROTORCRAFT - A pressure-balance valve for balancing the pressures of fluids admitted into the pressure-balance valve via respective second ducts. The pressure-balance valve has both a chamber for guiding movement in translation of a piston, and also fluid flow paths, each comprising a said second duct and a first duct for admitting a fluid coming from the same fluid source as the fluid flowing in its second duct. Each of the first ducts is provided with a shutter co-operating with a ramp arranged on the piston. Movement of the piston in translation as a result of a pressure difference between the fluids respectively admitted into the second ducts causes one of the shutters to slide along the corresponding ramp and consequently allows additional fluid to be delivered from a first duct to the second duct of the same fluid flow path. | 10-15-2015 |
20160195111 | FLUID PRESSURE CONTROL APPARATUS | 07-07-2016 |