Inspection of track assemblies
US4209205A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1977 |
| Grant date | Jun 24, 1980 |
| Priority date | — |
| Expiry date | Dec 20, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D55/15
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An improved track assembly adapted for use with crawler-type vehicles of the type including a joint having a shaft, an element journalled on the shaft, a lubricant port opening to one end of the shaft and in fluid communication with the interface of the shaft and the element, and a removable plug received in the port for confining lubricant therein. The invention contemplates the improvement wherein the plug is an elastomeric sleeve having a frusto-conical outer surface and a rod of translucent material received within and sealed against the sleeve. The presence or absence of lubricant within the port is ascertained by optical inspection of the end of the rod exterior of the port without removing the plug from the port.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.