Cart pulling vehicle with dual cable drums and dual torsion...

Details Cart pulling vehicle with dual cable drums and dual torsion... Cart pulling vehicle with dual cable drums and dual torsion...

2005-04-19

2005-04-19

Boehler, Anne Marie (Department: 3611)

Motor vehicles

Steered by walking attendant

Who steerably controls steerable wheel

C280S033991

Reexamination Certificate

active

06880652

ABSTRACT:
A cart pulling vehicle for use in parking lots made up of a hand operated motor-driven base which pulls shopping carts. The device utilizes a cable that is retractably mounted on the base and stretches to surround the line of carts pulled. This cable is retracted by a pair of cable drums at its ends which are driven by torsion springs. These separate dual torsion springs place torque on the cable drums which, in turn, exert tension on each half of the cable. When the cart pulling vehicle is in motion, a lock arrangement prevents additional cable from unreeling which the tension on each side cable pulling the carts in a train-like fashion. When the vehicle is stopped, a lock is released and the cable is able to extend to surround additional carts.

REFERENCES:
patent: 4289212 (1981-09-01), Immel
patent: 4970882 (1990-11-01), Arrendondo
patent: 5082074 (1992-01-01), Fischer
patent: 5322306 (1994-06-01), Coleman
patent: 5791669 (1998-08-01), Broddon et al.
patent: 5860485 (1999-01-01), Ebbenga
patent: 5897039 (1999-04-01), Swenke
patent: 5934694 (1999-08-01), Schugt et al.
patent: 6220379 (2001-04-01), Schugt et al.
patent: 6244366 (2001-06-01), Otterson et al.
patent: 6260643 (2001-07-01), Schuchardt

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