Title:
仮想アクティブヒッチ装置
Document Type and Number:
Japanese Patent JP4543207
Kind Code:
B2
Abstract:
A virtually active hitch system is provided for the damping of vertical oscillations of an elevator car during a semi-active hitch mode of operation along a relatively lengthy elevator travel path and for load leveling the elevator car during an active mode when the elevator is braked. The virtually active hitch stores energy derived from the elevator motor during the semi-active mode, and utilizes that stored energy during the active mode to actively adjust the positioning of the elevator car, as might result from load changes. The hitch assembly may advantageously use hydraulic piston and cylinder means to adjust, or impede adjustment of, a limited hitch gap between a support rope and the elevator car. The hydraulic circuit associated with the piston and cylinder may include a variable orifice valve to control damping action and a pair of accumulators controlled via a switching network to selectively store and release energy and to also serve as a spring.
Inventors:
James W. Fuller
Application Number:
JP36705899A
Publication Date:
September 15, 2010
Filing Date:
December 24, 1999
Export Citation:
Assignee:
OTIS ELEVATOR COMPANY
International Classes:
B66B1/06; B66B1/42; B66B7/08
Domestic Patent References:
| JP10067476A | ||||
| JP8259127A | ||||
| JP3120188A | ||||
| JP8040510A | ||||
| JP63306178A |
Attorney, Agent or Firm:
Tsuyoshi Hashimoto
Tomioka Kiyoshi
Tomioka Kiyoshi