Patent ID: 7360497
Filing Date: 2008-04-22
Classification: D05B

Abstract:
1. A sewing machine comprising: a presser foot; a drive shaft operably connected to said presser foot which imparts periodic upward movement to said presser foot; a biasing mechanism operably connected to said presser foot which normally biases said presser foot into a downward position, said biasing mechanism comprising a toggle link having a pivot, a resilient element operably connected to said toggle link on one side of said pivot and said presser foot operably connected to said toggle link on the other side of said pivot; wherein said resilient element is a compression spring; a presser foot lifting bar, said presser foot operably connected to said presser foot lifting bar; a mounting plate; said toggle link operably pivoted relative to said mounting plate; said resilient element operably fixed relative to said mounting plate; said toggle link operably connected to said presser foot lifting bar; a support plate, said toggle link pivoted to said support plate and said resilient element fixed to said support plate; said support plate pivoted to said mounting plate; whereby pivoting said support plate relative to said mounting plate pivots said toggle link and resilient element out of biasing engagement with said presser foot lifting bar.