Twin elevator systems

Details Twin elevator systems Twin elevator systems

2005-08-19

2010-11-30

Salata, Jonathan (Department: 2837)

Elevator, industrial lift truck, or stationary lift for vehicle

Having independent supports carrying distinct loads and...

C187S383000, C187S902000

Reexamination Certificate

active

07841450

ABSTRACT:
An elevator system comprises at least two independently operable elevator cars in each of a plurality of elevator shafts within a building. The elevator system comprises at least one first elevator shaft having a lower first and a lower second region, where a first elevator car moves within the lower first region of the first elevator shaft and a second elevator car moves within the lower second region. The first and second elevators are moveably controlled independently of each other within the first shaft. The system also includes at least one second elevator shaft having an upper first and an upper second region, where a third elevator car moves within the upper first region of the second elevator shaft and a fourth elevator car moving within the upper second region. The third and fourth elevator cars also are moveably controlled independently of each other.

REFERENCES:
patent: 1837643 (1931-12-01), Anderson
patent: 1911834 (1933-05-01), Lindquist
patent: 5419414 (1995-05-01), Sakita
patent: 5663538 (1997-09-01), Sakita
patent: 6854564 (2005-02-01), Reuter et al.
patent: 6871727 (2005-03-01), Jokela et al.
patent: 6991068 (2006-01-01), Siikonen et al.
patent: 7128190 (2006-10-01), Kostka et al.
patent: 7198136 (2007-04-01), Urata
patent: 7360629 (2008-04-01), Hagi et al.
“Twin Lift System” from Apr. 2004 edition of Elevator World.
“ThyssenKrupp's TWIN Lift System” from Jul. 2003 edition of Elevator World.

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