Upper feed device for sewing machine

Sewing – Stitch forming – Feeding work material

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

112313, D05B 2706

Patent

active

051742306

ABSTRACT:
An upper feed device for a sewing machine comprises an upper feed arm having its base end coupled with a longitudinally swinging crank and an upper feed dog attached at its front end. The mechanism for vertically moving the upper feed arm consists of a clutch mechanism comprising a lever rotatably mounted on a vertical feed shaft and swinging in cooperation with the main shaft, an abutment disposed on the lever and an abutment of a collar disposed on the vertical feed shaft, which is capable of disconnecting the cooperation of the lever and the vertical feed shaft, and a crank having a roller slidably fitting with a guide disposed parallel to the upper feed arm and which moves vertically through its attachment to the vertical feed shaft. A block is provided below the roller to engage with the free lower end surface of the crank and is adjustable in its mounting position to prevent the roller from descending more than specified. The upper surface of the block engages with the free lower end surface of the crank and is inclined.

REFERENCES:
patent: 4285294 (1981-08-01), Aida
patent: 4341172 (1982-07-01), Thompson
patent: 4417536 (1983-11-01), Shiomi
patent: 4421047 (1983-12-01), Alberti
patent: 4589364 (1986-05-01), Yamamoto et al.
patent: 4594958 (1988-06-01), Ide
patent: 4759304 (1988-07-01), Nava et al.
patent: 4978843 (1991-01-01), Kasuda

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Upper feed device for sewing machine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Upper feed device for sewing machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Upper feed device for sewing machine will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1880642

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.