Railways – Car stops
Reexamination Certificate
2000-03-16
2001-10-23
Morano, S. Joseph (Department: 3617)
Railways
Car stops
C104S166000, C104S251000
Reexamination Certificate
active
06305295
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the invention.
The present invention relates to a stopping device for a transport trolley, more particularly a stopping device for a transport trolley driven by a continuously rotating axle which is positioned according to the movement direction of such trolley.
2. Discussion of the related art.
More particularly, the present invention has as an object a stopping device for transport trolleys whereby the transport trolley is moved along guidances or rails, preferably on running wheels, and whereby under this transport trolley, driving wheels are provided which cooperate with said continuously rotating axle in order to move the transport trolley along said guidances or rails.
The stopping device has as a function either to let the transport trolley pass at a maximum speed when a stop of the transport trolley is not necessary (stopper completely drawn back); or to slow down such transport trolley and to bring it gradually to a complete standstill (stopper completely drawn out), when products placed upon such transport trolley have to be processed or similar; after standstill, to let the transport trolley gradually accelerate up to maximum speed (stopper partially drawn back).
The maximum speed reached by such transport trolley will be obtained when said driving wheels provided under such trolley are placed at an angle of 45 in respect to the longitudinal direction of said driving axle, whereas a complete standstill of the transport trolley in respect to the aforementioned rails will be achieved when these driving wheels form an angle of 90 with said driving axle and the speed of the transport trolley can be altered progressively between the standstill of the transport trolley and the maximum speed thereof by placing said driving wheels at other angles.
SUMMARY OF THE INVENTION
A great disadvantage of known stopping devices consists in that, when a transport trolley, is set moving again from a standstill, this is always accompanied by a sudden acceleration from 0 up to the maximum speed of the transport chain, as a result of which such transport trolley is subject to relatively large shocks, which, in certain cases, is not desired or allowed.
Therefore, the stopping device according to the invention aims at placing said driving wheels provided under such transport trolley, which are in contact with said driving axle, at the suitable moment at a suitable angle in respect to this driving axle, in order to be able to obtain a desired speed and to have the deceleration or acceleration of the transport trolley into or from a standstill run progressively.
This stopping device for a transport trolley which can be moved along guidances or rails and whereby the transport trolley is provided with driving wheels which cooperate with a rotating axle and which, by means of a lever with a contact wheel, can be set at different angles in respect to said driving axle, has as a characteristic that this stopping device consists of at least a lever with an ascending edge and a descending lateral edge, prolonged by an acceleration lever, the transition of which is formed by a tip, and a hydraulic, pneumatic or electric drive which can position said levers in three positions, namely, with said tip outside the path of said contact wheel and out of contact with the levers; with lever and tip entirely in the path of the contact wheel; and with the tip outside of the path of the contact wheel, however, with the contact wheel in contact with the acceleration lever.
REFERENCES:
patent: 3343645 (1967-09-01), Doerfling
patent: 3356040 (1967-12-01), Fonden
patent: 3696756 (1972-10-01), Elmore et al.
patent: 3818837 (1974-06-01), Jacoby et al.
patent: 4036148 (1977-07-01), Jones et al.
patent: 4086854 (1978-05-01), Scheel
patent: 4347792 (1982-09-01), Nagahori
patent: 4515085 (1985-05-01), Rohrbach
patent: 4838171 (1989-06-01), Yokoi et al.
patent: 2 067 488 (1981-07-01), None
patent: 2 067 489 (1981-07-01), None
Bacon & Thomas PLLC
Elektrieiteit voor Goederenbehandeling Marine en Industrie in he
Morano S. Joseph
Olson Lars A.
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