Elevator system

Details Elevator system Elevator system

1996-05-06

1997-12-23

Noland, Kenneth

Elevator, industrial lift truck, or stationary lift for vehicle

Having independent supports carrying distinct loads and...

187257, B66B 900

Patent

active

056998791

ABSTRACT:
An elevator system is shown that includes an elevator shaft (12) in which an elevator car (C) is movable along vertical axis (14). Car (C) is connected by drive ropes (26-1 through 26-4) to counterweight (CW) movable along vertical axis (20). A drive motor (M) having motor shaft sections (S-1 and S-2) extending from opposite ends of the motor is located above the elevator car for simultaneously moving car (C) and counterweight (CW) in opposite directions. First and second non-parallel drive shafts (32 and 34) are coupled to the respective motor shaft sections (S-1 and S-2) by bevel gears (36 and 38) respectively. The first drive rope (26-1) extends obliquely over the elevator car (C) between drive sheave (40) and idler sheave (44), and the second drive rope (26-2) extends obliquely over the elevator car between drive sheave (42) and idler sheave (46). The third drive rope (26-3) extends obliquely over elevator car (C) between sheaves (54) and (70). Similarly, the fourth drive rope (26-4) extends obliquely over elevator car (C) between sheaves (56) and (72). A second elevator car (CA), counterweight (CWA), drive motor (MA), drive ropes (26A-1) through (26A-4) and associated mechanism are located in the elevator shaft, which second car (CA) and (CWA) are movable by motor (MA) independently of car (C) and counterweight (CW). Drive ropes (26-1 through 26-4) extend through apertures (31A) in counterweight (CWA) , and compensating ropes (80A-1 through 80A-4) extend through apertures (31) in counterweight (CW).

REFERENCES:
patent: Re18095 (1931-06-01), Sprague
patent: 1458881 (1923-06-01), Gromer
patent: 1911834 (1933-05-01), Lindquist
patent: 5419414 (1995-05-01), Sakita
patent: 5584364 (1996-12-01), Sakita

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