Sewing – Elements – Frames
Reexamination Certificate
2009-04-03
2011-10-04
Patel, Tejash (Department: 3765)
Sewing
Elements
Frames
C112S256000
Reexamination Certificate
active
08028635
ABSTRACT:
A needle bar supported in a head unit is connected with a needle bar lever extending from the inside of a sewing machine arm and the needle bar is moved up and down by swing of the needle bar lever about a supporting shaft generated by transmission from a sewing machine main shaft. The sewing machine arm and the head unit are fluid-tightly shielded by a shield plate, and a first sealing part is provided in the shield plate. The first sealing part supports the needle bar lever by fitting a portion of the needle bar lever into seal plates held between a presser plate and a back face of a seal support having a curved shape of a circular arc taken along a swinging locus of the needle bar lever. The inside of the sewing machine arm is oil-lubricated, and the inside of the head unit is grease-lubricated.
REFERENCES:
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patent: 6073567 (2000-06-01), Aoki
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patent: 2004-313740 (2004-11-01), None
patent: 2005-27647 (2005-02-01), None
patent: 2006-207697 (2006-08-01), None
Kanegawa Yasuo
Mitsuji Toshiro
Birch & Stewart Kolasch & Birch, LLP
Patel Tejash
Yamato Mishin Seizo Kabushiki Kaisha
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