Power plants – Pressure fluid source and motor – Condition responsive control of motive fluid flow
Patent
1988-12-21
1991-01-22
Look, Edward K.
Power plants
Pressure fluid source and motor
Condition responsive control of motive fluid flow
91176, 91363R, 91518, 91520, 91531, 91436, 414408, B25J 914, B25J 920
Patent
active
049860747
ABSTRACT:
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.
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patent: 4125974 (1978-11-01), Kay et al.
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patent: 4622886 (1986-11-01), Imada et al.
patent: 4709618 (1987-12-01), Zongker
patent: 4715767 (1987-12-01), Edelhoff et al.
Hahmann Wolfgang
Kirchhoff Johannes
Sandkuhler Georg
Barmag AG
Edelhoff Polytechnik GmbH & Co.
Kapsalas George
Look Edward K.
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