LADDER FRAME FOR INTERNAL COMBUSTION ENGINE
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United States of America Patent
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Issued Date -
Jun 20, 2019
app pub date -
Nov 8, 2018
filing date -
Dec 14, 2017
priority date (Note) -
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status (Latency Note)
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Abstract
A ladder frame for an internal combustion engine includes a first lateral wall and a second lateral wall, crank caps, and first joining portions and second joining portions. Each crank cap includes an arc-shaped center portion, a first lateral portion and a second lateral portion. Each first lateral portion is joined to the first lateral wall via each first joining portion, and each second lateral portion is joined to the second lateral wall via each second joining portion. Each center portion includes a supporting portion that rotatably supports the crankshaft, the center portion including a recess to which the residual portion is joined, on the opposite side to the supporting portion. Respective thicknesses of the first lateral portion and the second lateral portion are the same as that of the center portion. The recess is provided with a projection embedded in the residual portion.
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