Horizontal rotary hook for sewing machine
US7171914B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 2005 |
| Grant date | Feb 6, 2007 |
| Priority date | — |
| Expiry date | Oct 14, 2025 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05B57/143
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A horizontal rotary hook of a sewing machine includes an inner rotary hook made of synthetic resin and housing a bobbin, an outer rotary hook made of synthetic resin and housing the inner rotary hook and rotated in a predetermined direction, an adsorption plate made of a magnetic material and mounted on one of an outer surface of a bottom wall of the inner rotary hook and an inner surface of a bottom wall of the outer rotary hook, a magnet piece formed as a thin plate and mounted in the other of the outer surface of the bottom wall of the inner rotary hook and the inner surface of the bottom wall of the outer rotary hook, and a yoke member made of a magnetic material and housing the magnet piece integrally formed with a bottom wall contacting the magnet piece and a wall surrounding an outer circumferential side of the magnet piece. The yoke member is mounted on the other of the outer surface of the bottom wall of the inner rotary hook and the inner surface of the bottom wall of the outer rotary hook.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.