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1. WO1994002404 - ELEVATOR BRAKE WITH SHOES ACTUATED BY SPRINGS

Publication Number WO/1994/002404
Publication Date 03.02.1994
International Application No. PCT/US1993/005960
International Filing Date 22.06.1993
Chapter 2 Demand Filed 10.02.1994
IPC
B66B 5/04 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
66HOISTING; LIFTING; HAULING
BELEVATORS; ESCALATORS OR MOVING WALKWAYS
5Applications of checking, fault-correcting or safety devices in elevators
02responsive to abnormal operating conditions
04for detecting excessive speed
B66B 5/18 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
66HOISTING; LIFTING; HAULING
BELEVATORS; ESCALATORS OR MOVING WALKWAYS
5Applications of checking, fault-correcting or safety devices in elevators
02responsive to abnormal operating conditions
16Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
18and applying frictional retarding forces
B66D 5/16 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
66HOISTING; LIFTING; HAULING
DCAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
5Braking or detent devices characterised by their application to lifting or hoisting gear, e.g. for controlling the lowering of loads
02Crane, lift, hoist, or winch brakes operating on drums, barrels, or ropes
16for action on ropes or cables
B66D 5/26 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
66HOISTING; LIFTING; HAULING
DCAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
5Braking or detent devices characterised by their application to lifting or hoisting gear, e.g. for controlling the lowering of loads
02Crane, lift, hoist, or winch brakes operating on drums, barrels, or ropes
24Operating devices
26pneumatic or hydraulic
CPC
B66B 5/04
BPERFORMING OPERATIONS; TRANSPORTING
66HOISTING; LIFTING; HAULING
BELEVATORS; ESCALATORS OR MOVING WALKWAYS
5Applications of checking, fault-correcting, or safety devices in elevators
02responsive to abnormal operating conditions
04for detecting excessive speed
B66B 5/18
BPERFORMING OPERATIONS; TRANSPORTING
66HOISTING; LIFTING; HAULING
BELEVATORS; ESCALATORS OR MOVING WALKWAYS
5Applications of checking, fault-correcting, or safety devices in elevators
02responsive to abnormal operating conditions
16Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
18and applying frictional retarding forces
B66B 5/185
BPERFORMING OPERATIONS; TRANSPORTING
66HOISTING; LIFTING; HAULING
BELEVATORS; ESCALATORS OR MOVING WALKWAYS
5Applications of checking, fault-correcting, or safety devices in elevators
02responsive to abnormal operating conditions
16Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
18and applying frictional retarding forces
185by acting on main ropes or main cables
B66D 5/16
BPERFORMING OPERATIONS; TRANSPORTING
66HOISTING; LIFTING; HAULING
DCAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
5Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
02Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
16for action on ropes or cables
B66D 5/26
BPERFORMING OPERATIONS; TRANSPORTING
66HOISTING; LIFTING; HAULING
DCAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
5Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
02Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
24Operating devices
26pneumatic or hydraulic
Applicants
  • HOLLISTER-WHITNEY ELEVATOR CORP. [US]/[US]
Inventors
  • GLASER, Walter
Agents
  • BROOKS, Lorimer, P.
Priority Data
07/919,20924.07.1992US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) ELEVATOR BRAKE WITH SHOES ACTUATED BY SPRINGS
(FR) FREIN D'ASCENSEUR A MACHOIRES ACTIONNEES PAR RESSORT
Abstract
(EN)
An emergency brake for an elevator car. The problem with car brakes is the uneven braking force applied and uneven wear of the linings. The elevator employs springs which maintain a constant braking force on the shoes. The springs (15, 16) are compressed by a fluid operable piston and cylinder assembly (35). The springs (15, 16) move a cam follower (17) along cam surfaces (20, 21) shaped to cause the cam follower (17) to move one brake shoe (22) toward the other shoe (24). Switches (63, 57) operable by the cam follower (17) control the car (4) so that movement of the car (4) is prevented when the springs (15, 16) are not compressed and when there is excessive shoe wear.
(FR)
Frein de secours pour une cabine d'ascenseur. Le problème associé aux freins d'ascenseur se rapporte à l'application d'une force de freinage irrégulière et à l'usure irrégulière des garnitures. L'ascenseur utilise des ressorts qui maintiennent une force de freinage constante sur les mâchoires. Les ressorts (15, 16) sont comprimés par un ensemble piston et cylindre (35) hydrauliques. Les ressorts (15, 16) déplacent une contre-came (17) le long de surfaces (20, 21) de came profilées de façon que la contre-came (17) déplace une mâchoire (22) de frein vers l'autre (24). Des interrupteurs (63, 57) actionnés par la contre-came (17) commandent la cabine (4) de façon à empêcher le mouvement de cette dernière (4) lorsque les ressorts (15, 16) ne sont pas comprimés et lorsqu'une usure excessive des mâchoires est produite.
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