Conveyors: power-driven – Conveyor or accessory therefor specialized to convey people – With means to control the operation of the section
Reexamination Certificate
2011-05-31
2011-05-31
Bidwell, James R (Department: 3651)
Conveyors: power-driven
Conveyor or accessory therefor specialized to convey people
With means to control the operation of the section
C198S322000
Reexamination Certificate
active
07950514
ABSTRACT:
A braking apparatus and method for an escalator or moving walkway are provided. The braking apparatus may include a braking element, a linearly controllable solenoid assembly, a biasing mechanism, and a control device. The braking element may be adapted to engage a brake drum or brake disk on a drive shaft of the escalator or moving walkway. The linearly controllable solenoid assembly may include a brake coil and an elongated member. The elongated member may be moveable linearly along an axis and the braking element may be coupled to the elongated member. The biasing mechanism may be arranged to bias the elongated member in a first direction along the axis to increase a torque applied to the drive shaft by the braking element. The control device may be configured to modulate a current to the brake coil based on at least one measured parameter associated with an operating condition of the escalator or moving walkway, whereby the elongated member is biased in a second direction along the axis opposite the first direction to decrease the torque applied to the drive shaft by the braking element.
REFERENCES:
patent: 1743995 (1930-01-01), Bartlett
patent: 2085873 (1937-07-01), Schoepf et al.
patent: 2824623 (1958-02-01), Nord et al.
patent: 3830344 (1974-08-01), Cervenec et al.
patent: 3896925 (1975-07-01), Mitsui et al.
patent: 4023655 (1977-05-01), Anzai et al.
patent: 4031987 (1977-06-01), Webb
patent: 4033434 (1977-07-01), Henrich
patent: 4588065 (1986-05-01), Maiden et al.
patent: 4875558 (1989-10-01), Berkhan et al.
patent: 5337878 (1994-08-01), Mehlert et al.
patent: 6112166 (2000-08-01), Joosten
patent: 6520300 (2003-02-01), Balzer-Apke et al.
patent: 6766893 (2004-07-01), Neumann et al.
patent: 6805224 (2004-10-01), Lauch et al.
patent: 6896119 (2005-05-01), Wiesinger et al.
patent: 6971496 (2005-12-01), Nurnberg et al.
patent: 2002/0109404 (2002-08-01), Balzer-Apke et al.
patent: 2003/0102199 (2003-06-01), Neumann et al.
International Search Report for PCT/US2010/051075 dated Dec. 1, 2010.
Written Opinion of ISA for PCT/US2010/051075 dated Dec. 1, 2010.
Boom Anthony
Nurnberg Thomas
Bidwell James R
Flandro Ryan M.
Kinberg Robert
Kone Corporation
Venable LLP
LandOfFree
Apparatus and method for variable torque braking of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for variable torque braking of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for variable torque braking of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2646809