Land vehicles: wheels and axles – Wheel – Compression wheel
Reexamination Certificate
2005-01-04
2005-01-04
Stormer, Russell D. (Department: 3617)
Land vehicles: wheels and axles
Wheel
Compression wheel
C301S065000
Reexamination Certificate
active
06837549
ABSTRACT:
A light alloy wheel for a vehicle comprising a disc portion comprising a hub portion and a design portion and a rim portion, the design portion having as-die-cast spoke portions having a taper angle of less than 5.0°. This wheel can be produced by using a casting apparatus comprising a die assembly comprising at least a stationary lower die and a movable upper die, a movable platen to which the upper die is fixed, a first cylinder and at least three synchronous second cylinders mounted onto a frame of the apparatus for moving the movable platen; driving the first cylinder to slowly reduce the clamping force of the lower die and the upper die; synchronously driving the second cylinders to elevate the movable platen in parallel from a position at which the lower die and the upper die are clamped to a position at which the wheel would not impinge on the lower die even if the movable platen were slanted; and then further elevating the movable platen by the first cylinder.
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Machinery's Handbook; 26th Edition; Erik Oberg et al; 2000.
Ito Hajime
Kanai Minoru
Taniguchi Masanobu
Usui Kenji
Hitachi Metals Ltd.
Stormer Russell D.
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