Power antenna drive cable seal
US5142294A · kind A · utility
1Cited by
5References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 16, 1991 |
| Grant date | Aug 25, 1992 |
| Priority date | — |
| Expiry date | Aug 16, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/10
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A power antenna drive cable seal has a dynamic response to cable winding direction that allows the cable to slide through freely on the up stroke, when it is under compression, but which vigorously scrapes the cable on the down strike, when it is under tension. The seal is a resilient, bellows shaped unit with a flared throat that changes from a divergent, cable passing shape to a convergent, cable grabbing shape. the shape change is caused by the axial force of the cable changing direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.