Pantagraph-type jack
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United States of America Patent
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N/A
Issued Date -
Jan 10, 2008
app pub date -
Jun 29, 2007
filing date -
Jul 10, 2006
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
In a pantagraph-type jack, inner bosses are integrally formed on inner side surfaces of opposite side plate portions of each lower arm and each upper arm so as to support lower pivots and upper pivots, respectively; outer bosses are integrally formed on outer side surfaces of the opposite side plate portions of each lower arm and each upper arm so as to support the lower pivots and the upper pivots, respectively; and the outer bosses rotatably contacts inner side surfaces of opposite side plate portions of each of the base and the load bearing platform. Thus, a frictional torque is minimized between the lower arms and the base as well as between the upper arms and the load bearing platform when the load bearing platform is raised and lowered, and a support strength of the lower arms with respect to the lower pivots and a support strength of the upper arms with respect to the upper pivots are enhanced.
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