Apparatus for moving a carriage along the length of purlins of a roof structure and method of using same
US6041568A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1998 |
| Grant date | Mar 28, 2000 |
| Priority date | — |
| Expiry date | Mar 31, 2018 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04D15/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus for moving a carriage along a roof structure of the type having a plurality of purlins spaced apart from one another in a parallel arrangement, and method of using same are disclosed. The apparatus includes a grappling member mounted for movement along the length of a first one of the plurality of purlins. The grappling member is adapted to be temporarily placed into a locked position so that the grappling member is fixed with respect to the first purlin. A tension member operatively connects the grappling member to the carriage. A pulling device is used to pull on the tension member so as to shorten the distance between the grappling member and the carriage, thereby advancing the carriage along the length of the purlins in a direction towards the grappling member when the grappling member is in the locked position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.