High lift sewing machine
US5309854A · kind A · utility
8Cited by
22References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 19, 1992 |
| Grant date | May 10, 1994 |
| Priority date | — |
| Expiry date | Aug 19, 2012 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05B27/04
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention comprises improvements to sewing machines for increasing the throat clearance of the machine. The improvements relate to 1) modifications to mechanical components of the machine to increase the throw and upper travel limits of the presser foot, upper feeding foot, needle and spreader, 2) an adjustment for allowing the speed of the upper walking foot to be variable relative to the speed of the lower walking foot, and 3) an improved biasing spring for biasing the presser foot downward.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.