Telescopic differential column hydraulic cylinder

Details Telescopic differential column hydraulic cylinder Telescopic differential column hydraulic cylinder

1982-08-19

1984-10-30

Schmidt, Frederick R.

Implements or apparatus for applying pushing or pulling force

Fluid pressure

Vehicle attached

B66F 324

Patent

active

044796331

ABSTRACT:
A first elongated support member is provided and includes second large and small outside cross-sectional area end portions. A cylinder member is provided and includes large and small end portions sealingly and slidingly engaged with the large and small diameter end portions, respectively, of the first support member and defining a peripheral expansion chamber between the support member and the second cylinder member. Structure is provided operative to admit and evacuate fluid under pressure to and from the expansion chamber. A third cylinder member is provided including base and far ends sealingly and slidingly engaged with the large and small end portions of the second cylinder member and with a peripheral expansion zone being defined between the second cylinder member and the third cylinder member between the base and far ends portions of the third cylinder member. Further, structure is provided establishing communication between the expansion chamber and the expansion zone. The first elongated support member is considerably longer than the second cylinder member and the latter is longer than the third cylinder member.

REFERENCES:
patent: 2634587 (1953-04-01), Ptak
patent: 2666501 (1954-01-01), Abbe
patent: 3181436 (1965-05-01), McCreery

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