发明名称 Caster
摘要 A caster including a pair of diametrically opposed rollers having axes of rotation which are angled with respect to the supporting surface on which the caster travels. During movement of the caster, the rollers exert opposing transversely-directed forces on the caster thereby enabling the caster to be moved in its directed path without the creation of forces on the caster by the rollers which would tend to deflect the caster from its path.
申请公布号 US4161803(A) 申请公布日期 1979.07.24
申请号 US19770859319 申请日期 1977.12.12
申请人 PROPST, PAUL L;PROPST, ROBERT L 发明人 PROPST, PAUL L;PROPST, ROBERT L
分类号 B60B33/00;(IPC1-7):B60B33/00 主分类号 B60B33/00
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