Barmag Ag

Barmag Barmer Maschinenfabrik Ag

Edelhoff Polytechnik Gmbh & Co.

Hydac System Gmbh

Hydac Technology Corporation

Hydac International Gmbh

Wolfgang Hahmann

Peter Kloft

Albert Stitz

Johannes Kirchhoff

Frank Bauer

Franz Peter Salz

Georg Sandkuhler

Frank Herold

Claus Kirchherr

Daniel Thull

Norbert Böhmer

An energy converting device, particularly for converting mechanical energy to hydraulic energy and from it into electrical energy, uses as an energy transport medium, a control fluid guided in two different control circuits. The control circuits have an operative connection to each other by a coupling device (). One control circuit () serves for feeding in energy, particularly in the form of mechanical energy. The other control circuit serves for discharging energy in the form of converted energy, particularly electrical energy.

Energy converting device

A lubrication system for supplying lubricant to a plurality of antifriction bearings composed of inner and outer bearing rings and a plurality of rolling elements mounted between the rings. The lubricant is intermittently supplied to the region of the rolling elements, with the amount of each intermittent supply being determined as a function of operating data which are continuouslu acquired from the bearing.

Method for a controlled supply of lubricant to an antifriction bearing

A lubrication system for supplying lubricant to a plurality of antifriction bearings, and which has a lubricant supply tank and a closed circuit lubricant supply line having two ends which communicate with the tank. A pump circulates the lubricant through the line, and a pressure regulating valve in the downstream end portion of the line maintains a desired pressure in the line. A plurality of tap lines lead from the closed circuit supply line to respective bearings via a metering or controllable valve.

System for supplying lubricant to a plurality of bearings

Antifriction bearing

An article handling apparatus is disclosed which comprises two independently controllable fluid actuated drives. The first fluid actuated drive comprises a cylinder and a differential piston which defines a large chamber and a smaller chamber. Also, a control system is provided which maintains a differential pressure between the large and small chambers in each of several operating positions. The second fluid actuated drive is mounted to the movable member of the first drive, and the second drive is controlled by fluid lines leading respectively to the large and small chambers of the first drive.

Hydraulic cylinder control system for garbage collection truck lift-dump

A hydraulic control valve is disclosed which is adapted to independently control the flow of hydraulic fluid to several consumer lines. The control valve includes a housing having a central bore, a pair of axially spaced apart consumer lines comunicating with the bore, a tank line communicating with the bore and positioned between the consumer lines, and a pair of hydraulic inlet lines communicating with the bore on the outer side of respective ones of the cosumer lines. A pair of slide valves are positioned in the bore, and each slide valve is supported in a neutral position by a coil spring. The two slide valves may be independently moved from their neutral position by a hydraulic control system, so that each slide valve is adapted to selectively establish communication between one of the consumer lines and the tank line, and between such consumer line and one of the hydraulic inlet lines.

Hydraulic control valve

A hydraulic power system is disclosed which comprises an internal combustion engine having a speed regulator, and which serves to drive a hydraulic system including a pump and a consumer or load. A throttle valve is positioned in the hydraulic system, and the throttle valve is connected to an adjustable controller, such that the volume flow rate to the consumer is proportional to the control signal delivered to the throttle valve by the controller. The same control signal of the controller is also delivered to the speed regulator of the engine. In one disclosed embodiment, the hydraulic system includes a plurality of consumers connected to a common pump, and each consumer includes an associated throttle valve and controller. Also, means are provided for weighting the several control signals from the controllers, and summing the weighted signals so that a composite adjusting signal is delivered to the speed regulator of the engine.

Hydraulic power system

Growing community of inventors

Kempen, Germany

Wolfgang Hahmann