Sewing machine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 16, 2021
Grant Date -
Aug 2, 2018
app pub date -
Jan 29, 2018
filing date -
Jan 31, 2017
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A needle bar 4 is supported by a needle bar supporter in a manner freely movable up and down relative to a frame. A crank 2 is fixed to an upper shaft 1, rotates with the upper shaft 1, and an output end thereof moves circularly. A crank rod 3 is connected to the crank 2 in a freely rotatable manner. A connection rod 8 is connected to an intermediate portion of the crank rod 3 in a freely rotatable manner, and is connected to the needle bar 4 in a freely rotatable manner. A length of the needle bar 4 and a length from a connecting position of the connection rod 8 and the crank rod 3 to a slider 7 differ. When the crank 2 circularly moves, the connecting position of the connection rod 8 and the crank rod 3 draws a trajectory of an ellipse.
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Cited Art Landscape
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