Rotary hook for sewing machine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 1, 1981
Grant Date -
N/A
app pub date -
Aug 27, 1979
filing date -
Sep 25, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A hook for a sewing machine comprising a hook body, a bobbin case holder arranged in the hook body, a bobbin case arranged in the bobbin case holder and a bobbin in the bobbin case. The bobbin case holder has a bottom wall from which extends a pin. The pin is provided with resilient check elements. A pin portion extends centrally from a bottom wall portion of the bobbin case defining a hole therein having a shape suitable to provide together with the pin of the bobbin case holder a locking system to lock the bobbin case to the bobbin case holder. A lever is positioned in the hole to ensure locking and release of the bobbin to and from the bobbin case. The bobbin is inserted in the bobbin case so as to close it upwardly.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
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