Balancing unit for pivotable mechanical elements, such as doors,

Details Balancing unit for pivotable mechanical elements, such as doors, Balancing unit for pivotable mechanical elements, such as doors,

1988-05-12

1990-02-27

Butler, Douglas C.

Material or article handling

Vertically swinging load support

Shovel or fork type

188382, 901 48, 74469, B66C 2300, F15B 100

Patent

active

049041509

ABSTRACT:
The invention relates to a balancing unit (1) for, for example, a movable arm in an industrial robot. The unit comprises a cylinder (2) with a piston (3) and a piston rod (4) arranged in the cylinder (2). The cylinder (2) is completely closed except for a sealed exit opening for the passage of the piston rod (4). On one side of the piston (3), the cylinder space is connected to a medium which is under high pressure, and on the other side of the piston (3) the cylinder space is connected, via a connection at the end of the cylinder (2), to a closed isolated space.

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Hydraulic Handbook, 2nd. Edition, published by Trade and Technical Press, Limited, Morden, Surrey, England, pp. 75-77, 158-166, 351, 1960.

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