Land vehicles – Wheeled – Coasters
Patent
1994-10-31
1995-09-05
Tyson, Karin L.
Land vehicles
Wheeled
Coasters
280 8705, 280649, 297 5, 108120, 482 68, B62B 706, A47D 1304
Patent
active
054473195
ABSTRACT:
An adjusting device includes an upper and a lower ring element connected with each other by a pivotal device disposed therebetween, the pivotal device has two pairs of rods cross-pivotally engaged, the upper ring element has a plane portion which has a shoulder formed on an under side, the adjusting device includes a movable element engaged to one pair of rods of the pivotal device, a base engaged to the under side of the plane portion and an operation element pivotally engaged to the base. The movable element has a serrated portion defined in an under side and the base has an opening defined therein corresponding to the serrated portion of the movable element. The operation element has a vertical portion and a horizontal portion which is pivotally engaged to an under side of the base with a spring disposed therebetween and a distal end has a serrated portion defined therein to engage to the serrated portion of the movable element via the opening of the base the horizontal portion has an operation bar transversely and slidably engaged therethrough and a block is engaged to an upper surface of the operation bar and has a resilient element disposed between the vertical portion of the operation element and the block which contacts the under side of the plane portion such that the serrated portion of operation element is disengaged from the serrated portion of the movable element by pulling the operation bar outwardly from the vertical portion and then lifting the operation bar upwardly.
REFERENCES:
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patent: 4171132 (1979-10-01), Kassai
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patent: 4576392 (1986-03-01), Quinlan, Jr.
patent: 4615523 (1986-10-01), Chen
patent: 4799700 (1989-01-01), Knoedler et al.
patent: 5324064 (1994-06-01), Sumser et al.
patent: 5351978 (1994-10-01), Chen
Mattix Carla
Tyson Karin L.
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