CPC Definition - Subclass B21L
This place covers:
Methods and devices for making metal chains essentially by metal forming operations (e.g. bending, cutting, assembling), eventually by welding.
This place does not cover:
Forging members of endless tracks | |
Making chains or chain links by casting |
Attention is drawn to the following places, which may be of interest for search:
Chains in general |
This place covers:
Methods and devices for making chains or chain links by bending work-pieces of rod, wire or strip to form links of oval or other simple shape.
Source: GB644151
This place covers:
Methods and devices for making chains or chain links by bending the ends of workpieces to abut.
Source: US4694644
This place covers:
Methods and devices for making chains or chain links by bending and interconnecting the ends of workpieces with or without separate jointing members.
Source: GB2324163
This place covers:
Methods and devices for making chains or chain links by bending the chain links or link parts and subsequently welding or soldering the abutting ends.
Source: EP2219803
This place does not cover:
Making chains or chain links by bending into a coil and cutting single loops or loop parts from coil and subsequently welding |
This place covers:
Methods and devices for welding chain links.
Source: DE10331400
This place covers:
Methods and devices for welding chain links by making use of forge or pressure welding.
Source: GB689391
This place covers:
Methods and devices for making chains or chain links by working the starting material in such a way that integral, i.e. jointless, chains links are formed.
This place covers:
Methods and devices for making chains or chain links by working the starting material in such a way that integral, i.e. jointless, chains links are formed in an interconnected manner.
Source: GB361952
This place covers:
Methods and devices for making chains or chain links by cutting single loops or loop-parts from coils, assembling the cut parts and subsequently subjecting same to twisting with or without welding.
Source: US6389790
This place covers:
Methods and devices for making chains or chain links, the links being composed of two or more different parts, e.g. drive chains.
Source: US4118995
Attention is drawn to the following places, which may be of interest for search:
Making chains or chain links by bending work-pieces and interconnecting the ends. | |
Making chains or chain links by bending and cutting single loops or loop parts from coils. | |
Making chains or chain links with inserted or integrally formed studs | |
Making terminal or intermediate chain links of special shapes. | |
Load carrier chains | B65G14/40 |
Endless traction elements in conveyors |
This place covers:
Methods and devices for making roller-chains or other plate-link type chains.
Source. US2007032325
This place covers:
Methods and devices for punching or bending the different parts of the chain links.
Source: FR2795474
Attention is drawn to the following places, which may be of interest for search:
Making belts from metal sheet | |
Forging members of endless tracks |
This place covers:
Methods and devices for sorting, feeding, assembling, riveting, or finishing parts of chains of the type being composed of two or more different parts.
Source: EP1803511
This place covers:
Methods and devices for assembling or disassembling parts of chains of the type being composed of two or more different parts.
Source: JP2008188598
This place covers:
Methods and devices for making chains of the type being composed of two or more different parts, wherein the chain links are combined with auxiliary parts, e.g. welded-on wear-resistant parts.
Source: US6068568
This place covers:
Methods and devices for making chains or chain links of special shape.
This place covers:
Methods and devices for making ornamental chains.
Source: US20090241598
This place does not cover:
Making chains or chain links by bending the ends of work-pieces to abut | |
Making chains or chain links with inserted or integrally formed studs |
Attention is drawn to the following places, which may be of interest for search:
Ornamental chains |
This place covers:
Methods and devices for making chains or chain links, wherein each link is formed of a single member of which both ends are bent or shaped to engage the middle portions of the next link.
Source: EP0774086
This place covers:
Methods and devices for making chains or chain links, wherein the ends of the links are pierced or punched to form eyes.
Source: DE19715707
This place covers:
Methods and devices for making chains or chain links starting from a thin strip of metal.
Source: US3869856
Attention is drawn to the following places, which may be of interest for search:
Making belts from metal sheet |
This place covers:
Methods and devices for making chains or chain links, wherein ends are interengaged with other parts of the same link.
Source: WO0246613
This place covers:
Methods and devices for making chains or chain links wherein the chain links have opposed correspondingly shaped cylindrical and hook-like parts of which one parts forms a hinge-like support for the adjacent link.
Source: WO2007017107
This place does not cover:
Making chains or chain links, wherein each link engages the middle portion of the next link. |
This place covers:
Methods and devices for making bead chains.
Source: EP0565379
This place covers:
Methods and devices for making links with inserted or integrally-formed studs.
Source: EP0736348
This place covers:
Methods and devices for making terminal or intermediate chain links of special shape or making couplings for chains, e.g. swivels, shackles.
Source: US6230961
This place covers:
Methods and devices for finishing (e.g. pre-stressing) or dressing chains or chain links, e.g. removing burr material, calibrating.
Source: GB1130249; EP1938916
Attention is drawn to the following places, which may be of interest for search:
Heat treatments for chain links |
This place covers:
Methods and devices for twisting already closed links.
Source: WO0228567
This place covers:
Appurtenances for chain-making not restricted to any particular process, like e.g. chain feeding or cleaning arrangements.
Source: WO0236288
This place covers:
Tools or implements for repairing chains using metal-working operations. e.g. for detaching deformed chain links.
Source: US20110179761
Attention is drawn to the following places, which may be of interest for search:
Hand tools for positioning and assembling or detaching sprocket chains, endless tracks or antiskid chains by press fit. |
This place covers:
Methods and devices for making chains or chain links not provided for in the groups B21L 1/00 - B21L 21/00.