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US 8,561,435 B2Granted
Latch needle with improved latch bearing
AssigneeGroz-Beckert KG
InventorsJohannes Bruske, Juergen Veeser, Werner Veeser, Jochen Stauss, Eric Juergens
Life of this patent
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Abstract
A latch needle includes a pivot pin connected with the latch in a torque-proof manner, said pivot pin having mirror-symmetrically shaped bearing heads (29, 30) on both sides of the latch shank (20). The bearing heads (29, 30) are produced by plastic deformation (i.e., axial upsetting of a pin (27)) and have a cylindrical exterior shape.
Claims14
Method for the manufacture of a latch bearing of a latch needle, the method comprising:
- providing of a needle base body having a shank in which is shaped a slot, said slot being delimited by two lateral walls;
- forming of two bearing openings in the slot walls, said bearing openings having matching shapes and being in alignment with one another;
- providing of a latch having a latch shank with a latch hole being a through hole, the cross-section of said latch hole being different from the cross-section of the bearing openings;
- positioning of one end of the latch in the slot, so that the latch hole is located in the region of the bearing openings;
- inserting of a pin into the latch hole;
- and
- deforming the pin on both sides to produce cylindrical bearing heads within the bearing openings;
- wherein the pin is non-rotatable connected with the latch by form-fitting or by non-positive engagement.
5 more elements
Latch needle comprising:
- needle base body having a shank in which is formed a slot, said slot being delimited by two lateral walls,
- wherein two bearing holes being through-holes in alignment with one another are formed with matching constant cross-sections through the slot walls;
- a latch having a latch shank with a latch hole being a through hole, the cross-section of said latch hole being smaller than the cross-section of the bearing holes;
- a bearing pin extending through the latch hole and having, within the two bearing holes, bearing heads of matching shape, said bearing heads having been produced together by plastic deformation and wherein the bearing pin is non-rotatably connected with the latch by form-fitting or by non-positive engagement.
1 more element
Dependencies are inferred from the claim text.