Actuating assembly for hydraulic elevators

Details Actuating assembly for hydraulic elevators Actuating assembly for hydraulic elevators

1989-04-24

1991-03-05

Wayner, William E.

Motors: expansible chamber type

Working member position responsive motive fluid control

91417R, F15B 1520

Patent

active

049969064

ABSTRACT:
An actuating assembly having a cylinder which receives a plunger defining a fluid restricting means along its lower end. A feed conduit delivers pressurized fluid through a fluid inlet and into the cylinder, which displaces the plunger out of the cylinder. As the plunger is displaced, the fluid restricting means progressively covers the fluid inlet, progressively restricting the rate of fluid flow into the cylinder, and slowing the plunger's displacement.

REFERENCES:
patent: 2463537 (1949-03-01), Hoar et al.
patent: 3568571 (1971-03-01), Hoen et al.
patent: 4026523 (1977-05-01), Gratzmuller

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