Passenger conveyor

Details Passenger conveyor Passenger conveyor

2006-09-01

2010-11-23

Crawford, Gene (Department: 3651)

Conveyors: power-driven

Conveyor or accessory therefor specialized to convey people

By stairway having steps forming an endless member

C198S813000, C198S815000

Reexamination Certificate

active

07837021

ABSTRACT:
Obtained is a passenger conveyor that, in the case of the elongation of a step chain of the passenger conveyor, causes a hydraulic cylinder to move a lower-part step chain wheel, thereby absorbing a slack in the step chain and tensioning the step chain with any push-out force. In a passenger conveyor provided with a step chain tensioning device that, in the case of the elongation of a step chain, causes a lower-part step chain wheel to move, thereby absorbing a slack in the step chain and tensioning the step chain with any tensioning force, the step chain tensioning device includes a tensioning device section, which has a hydraulic cylinder and pushes out the lower-part step chain wheel with a push-out force of the hydraulic cylinder on a side where the step chain is tensioned, and a pressure device section, which has a pressure piston to which a load by a weight is applied and causes the hydraulic cylinder of the tensioning device section to constantly give any tension to the step chain via a hydraulic oil due to the pressure of the pressure piston.

REFERENCES:
patent: 872327 (1907-12-01), Brown
patent: 1741842 (1929-12-01), Holtschmit
patent: 2438068 (1948-03-01), Mercier
patent: 2788883 (1957-04-01), Schwenk
patent: 3859791 (1975-01-01), Allen et al.
patent: 3901563 (1975-08-01), Day
patent: 3946619 (1976-03-01), Needles et al.
patent: 4007826 (1977-02-01), Brown et al.
patent: 4284192 (1981-08-01), Taylor
patent: 4466803 (1984-08-01), Wilson
patent: 4955195 (1990-09-01), Jones et al.
patent: 7117989 (2006-10-01), Weigel et al.
patent: 2004/0040296 (2004-03-01), Fan
patent: 547737 (1993-06-01), None
patent: 46 1900 (1971-01-01), None
patent: 52 80979 (1977-06-01), None
patent: 54 65190 (1979-05-01), None
patent: 54 133592 (1979-10-01), None
patent: 6 48675 (1994-02-01), None
patent: 2536774 (1997-05-01), None
patent: 10 87252 (1998-04-01), None

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