Rotary hook
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United States of America Patent
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-
Dec 31, 1991
Issued Date -
N/A
app pub date -
Aug 29, 1990
filing date -
Feb 21, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A fully rotating hook includes an inner bobbin case, an outer loop taker mounted about the bobbin case, the loop taker having a track groove formed therein, a rotating member for rotating the loop taker such that relative rotation occurs between the loop taker and the bobbin case, and a stopper member for preventing rotation of the bobbin case with the loop taker while the loop taker is rotating. The track groove of the loop taker is formed by at least one wall therein which is coated with a layer of synthetic resin material having a small coefficient of friction to reduce friction between a track projection member on the bobbin case and the track groove of the loop taker.
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