Hydraulic elevator having a counterweight

Details Hydraulic elevator having a counterweight Hydraulic elevator having a counterweight

1996-10-28

1999-05-11

Terrell, William E.

Elevator, industrial lift truck, or stationary lift for vehicle

Having specific load support drive-means or its control

Includes linking support cable in drive-means

B66B11/04

Patent

active

059018143

ABSTRACT:
A hydraulic elevator includes a hydraulic ram and a counterweight that are directly roped. The hydraulic ram includes a single-acting cylinder, piston and yoke that are placed within the hoistway adjacent to the path of motion of an elevator car. The counterweight is positioned adjacent to the hydraulic ram and on the same side of the car as the hydraulic ram. The combination of the directly counterweighted hydraulic ram and the arrangement of the hydraulic ram, counterweight and car results in minimal power and space requirements.

REFERENCES:
patent: 307998 (1884-11-01), Smith
patent: 5014823 (1991-05-01), Pelto-Huikko
patent: 5048644 (1991-09-01), Pelto-Huikko
patent: 5238087 (1993-08-01), Garrido et al.
patent: 5281774 (1994-01-01), Masaki
patent: 5443140 (1995-08-01), Dieter et al.

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