Clutch structure for presser foot of embroidery sewing machine

Sewing – Elements – Presser devices

Reexamination Certificate

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Details

C112S239000

Reexamination Certificate

active

07571689

ABSTRACT:
A clutch structure for a presser foot in an embroidery sewing machine is provided. The clutch structure includes a guide member, to which the presser foot drive link is rotatably connected, and through which the needle bar guide shaft passes, a spring connecting member mounted on the outer circumference of the needle bar guide shaft and inside the guide member, a resilient member mounted on the outer periphery of the spring connecting member, and a pivot member mounted inside the guide member so as to be pivotable around the needle bar guide shaft within a certain angular range by the height adjusting mechanism and the resilient member. Upon a head-interval adjusting operation, the unnecessary driving of the presser foot is prevented, so that the occurrence of vibrations and noise as well as the unnecessary wear of a needle bar, a presser foot support, and a presser foot holder can be prevented.

REFERENCES:
patent: 4716846 (1988-01-01), Schneider et al.
patent: 5507239 (1996-04-01), Fujii et al.
patent: 5590614 (1997-01-01), Murata et al.
patent: 5615628 (1997-04-01), Tajima et al.
patent: 6073567 (2000-06-01), Aoki
patent: 6415725 (2002-07-01), Yoshikazu

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