Cable drag chain
US6318063A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 2000 |
| Grant date | Nov 20, 2001 |
| Priority date | — |
| Expiry date | Oct 19, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S59/90
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A cable drag chain includes a plurality of link members connected together end to end in a bendable manner. Each of the link members is molded of synthetic resin and includes a pair of opposed left and right side plates, and upper and lower connecting plates connecting upper and lower edges, respectively, of the left and right side plates. The upper connecting plate has one end made contiguous to one of the side plates via a resiliently deformable hinge portion, the other end of the upper connecting plate being formed with a locking portion releasably engaged with a portion of the other side plate. The hinge portion has a circular recess formed in a central portion of an outside surface thereof and hence is reduced in cross-sectional area at the recessed central portion, so that the upper connecting plate has a tendency to resiliently flex at the recessed central portion in a given direction when the upper connecting plate is forced to move from an erected released position to a recumbent assembled position. The width and thickness of the hinge portion are determined in view of a maximum tensile stress and a maximum compressive stress of a synthetic resin material to such an extent…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.