Tubular D-shaped trunnion
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United States of America Patent
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Dec 2, 1997
Grant Date -
N/A
app pub date -
Nov 7, 1995
filing date -
Nov 7, 1995
priority date (Note) -
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Abstract
This invention relates to the construction of pantograph jacks and, in particular, relates to the construction of an improved trunnion for connecting the pantograph jack arms to the drive shaft. In particular, a pantograph jack is disclosed that has at least one joint including an end of an upper arm, an end of a lower arm, and a drive screw shaft all connected by a trunnion means. The improved trunnion comprises a rectangular plate having a length extending from a first end to a second end, and including a substantially flat first section, a curved second section folded back over the first section to juxtapose the second end to the first end, and the first section and the second section having first and second holes, respectively, aligned and sized to receive the drive screw shaft for sliding movement.
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