Method of manufacturing elevator links and a cast elevator link blank for use in the method
US3996737A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 10, 1975 |
| Grant date | Dec 14, 1976 |
| Priority date | — |
| Expiry date | Dec 10, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21K1/72
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of making a one-piece elevator link having a shank with an eye at each end involving the steps of casting from alloy steel a link blank having an oversize shank portion, forging or swaging the shank portion to reduce its diameter and correspondingly elongate it, and heat treating and drawing the forged or swaged blank to enhance its physical and mechanical properties. The eyes are cast in their final form. The oversize shank portion may be machined to reduce its diameter before it is forged or otherwise hot worked, whereby castings of but one size may be used in the production of elevator links of varying lengths. A cast elevator link blank to be hot worked into an elevator link of final form.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.