Push actuator

Details Push actuator Push actuator

1989-02-06

1989-10-24

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Miscellaneous

254 89R, 254 98, B66F 308

Patent

active

048756601

ABSTRACT:
This telescopic tube is formed of a first and of a second continuous bands wound in a spiral and in a helix, respectively, with the turns of each band lying flat against each other in the retracted position of the tube. The turns of the respective bands are normal to one another. To extend the tube, the turns of the first band are spaced from each other, and the turns of the second band are inserted between the spaced turns of the first band, so as to act as spacers for the latter turns. A mechanism is described to cause extension and retraction of the tube which is mainly used as a push actuator.

REFERENCES:
patent: 1570429 (1926-01-01), Bonnet
patent: 2173685 (1939-09-01), Grassmann
patent: 2265892 (1941-09-01), Bloch
patent: 2946556 (1960-07-01), Edgerton

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