Method of repairing bolts with replaceable threads
US6101699A · kind A · utility
Inventor
Key dates
| Filing date | Jun 26, 1998 |
| Grant date | Aug 15, 2000 |
| Priority date | — |
| Expiry date | Jun 26, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49963
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A screw with replaceable threads is particularly useful to releasably join the spiders of rotational molding machines. The screw comprises a master bolt that passes through a first spider, and a tip that is removably assembled to the master bolt. The tip is threaded to selectively engage and disengage a receiver on the second spider. When the tip is assembled to the master bolt, the screw is captured in the first spider. When the tip has worn through use, it can be replaced without disturbing the master bolt. Similarly, when the tip seizes to the receiver, the tip and receiver are replaceable as a unit without disturbing the master bolt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.