Variably controlled adjustable height carriages for raising, lowering, holding, locking and releasing objects on elevated structures
US8720836B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Jun 29, 2008 |
| Grant date | May 13, 2014 |
| Priority date | — |
| Expiry date | Jul 29, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21V21/38
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A system for raising and lowering a wide range of objects on an elongated tubular structure includes a carriage subsystem with a tubular body having an interior central channel an inner diameter greater than the outer diameter of the elongated tubular structure. Rollers facilitate linear translation of the tubular body along the elongated tubular structure. At least one hook is pivotally mounted on the tubular body and configured to controllably engage a means for locking the carriage in a raised position. The carriage subsystem also includes a flange for attaching an object to the carriage subsystem. A winch and cable control motion of the carriage system between a lowered position adjacent to the base and a raised position adjacent to the top of the tubular structure. A collar attached to the top of the tubular structure includes a tubular body with an outer diameter less than the inner diameter of the tubular body of the carriage subsystem. At least one slot is formed in the tubular body of the collar and configured for controllable engagement by the hook pivotally mounted on the tubular body in the interior central channel of the carriage subsystem. At least one pulley is rotat…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.