US 7,497,315 B2
Escalator drive system failure detection and brake activation
Richard Fargo, Plainville, Conn. (US); Helmut Meyer, Buckeberg (Germany); Frank Sansevero, Glastonbury, Conn. (US); Markus Hame, Stadthagen (Germany); and Hermann Wiese, Buckeburg (Germany)
Assigned to Otis Elevator Company, Farmington, Conn. (US)
Appl. No. 10/513,865
PCT Filed Feb. 07, 2003, PCT No. PCT/US03/03772
§ 371(c)(1), (2), (4) Date Nov. 08, 2004,
PCT Pub. No. WO03/099698, PCT Pub. Date Dec. 04, 2003.
Prior Publication US 2005/0173223 A1, Aug. 11, 2005
Int. Cl. B66B 23/06 (2006.01)
U.S. Cl. 198—323  [198/322] 22 Claims
OG exemplary drawing
 
1. A passenger conveyor drive assembly, comprising:
a motor;
a drive member that moves responsive to a motive force from the motor;
a driven member that moves responsive to movement of the drive member when there is sufficient engagement between the drive member and the driven member, movement of the driven member resulting in movement of a conveying surface of an associated passenger conveyor; and
a sensor comprising a member that moves responsive to a change in the engagement between the drive member and the driven member to provide an indication of an undesirable condition of the drive assembly.