Land vehicles – Wheeled – Coasters
Patent
1986-04-24
1987-10-13
Love, John J.
Land vehicles
Wheeled
Coasters
180282, 188 5, 297 5, B62D 710
Patent
active
046993924
ABSTRACT:
An improved carriage incorporates an automatic braking system that detects and reacts to the presence of a ledge and substantially inhibits movement of the carriage over the ledge. The carriage includes three rolling units pivotally coupled to a base in spaced relation about the periphery of the base. Each rolling unit includes a pair of wheels. A high friction pad is mounted on the base and presented toward the underlying surface for frictional engagement therewith. Movement of any one of the wheels over a boundary edge of the underlying surface causes the rolling unit supporting such wheel to pivot from a normally horizontal rolling position to a pivoted position. Such pivoting movement acts to collapse the carriage thereby lowering the high friction pad into frictional engagement with the underlying surface. A warning system is desirably provided for indicating engagement of the high friction pad and the underlying surface following collapse of the carriage to alert nearby persons of such collapse.
REFERENCES:
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patent: 2538324 (1951-01-01), Petrie
patent: 3003780 (1961-10-01), Lundahl
patent: 3265157 (1966-08-01), Rissler
patent: 3608693 (1971-09-01), Strosberg et al.
patent: 4019756 (1977-04-01), Ishida
patent: 4045045 (1977-08-01), Boucher et al.
patent: 4145682 (1979-03-01), Cook
patent: 4171132 (1979-10-01), Kassai
patent: 4231582 (1980-11-01), Moss
patent: 4364576 (1982-12-01), Kassai
Cosco, Inc.
Love John J.
Mar Michael
LandOfFree
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