Rodless cylinder

Details Rodless cylinder Rodless cylinder

1987-01-02

1988-05-17

Cohan, Alan

Expansible chamber devices

Displacement control of plural cylinders arranged in...

By adjusting or limiting motion of relatively movable power...

92 5R, 92163, 92165PR, 91DIG4, F15B 1524

Patent

active

047442875

ABSTRACT:
In a rodless cylinder comprising a series of driving magnets mounted on a piston fitted in a cylinder tube and a series of driven magnets on a driven member sliding along the cylinder tube, piping to convey a hydraulic fluid is simplified as follows. Both ends of the cylinder tube and guide rods extending parallel thereto are fastened to two end plates. Two ports through which the hydraulic fluid is supplied to and discharged from pressure chambers on both sides of the piston in the cylinder tube are provided in one of the end plates. While one of the ports communicates directly with one pressure chamber through the end plate, the other port communicates with the other pressure chamber through one of the guide rods and the other end plate. The driven member sliding along the cylinder tube carries the series of driven magnets and two annular sliding members on both sides thereof in such a manner as to be movable in the direction perpendicular to the axis of the cylinder. This eliminates the need of assembling the cylinder tube with very high accuracy. Also, the cylinder can exert its driving force to the maximum extent of its ability since any external force working on the driven member is supported by the guide rods.

REFERENCES:
patent: 3779401 (1973-12-01), Carroll
patent: 4043709 (1977-08-01), Grevich
patent: 4176586 (1979-12-01), Stoll et al.
patent: 4488477 (1984-12-01), Miyamoto

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