Servicing mechanism for rotational piping array
US5087391A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 8, 1990 |
| Grant date | Feb 11, 1992 |
| Priority date | — |
| Expiry date | Jun 8, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S261/47
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A portable wheeled hand truck mounts a rotary actuator, powered by a hand or motor-operated pump also contained on the truck, for lifting and rotating a diffused aeration piping array from a liquid/slurry treatment tank into a working and servicing position adjacent to the tank, such as a walkway. The wheeled truck is hand maneuvered so that the powered end of the actuator is in alignment with a connection arm extending from a pivotable pipe which is part of the array. A multi-positionable handle is included on the hand truck which, in an essentially horizontal position, is temporarily fixed to a tank walkway surface to support the reaction forces incident to lifting and rotating the heavy mass of the piping array. When not so fixed, the handle may be moved to an essentially vertical position for storage and to an intermediate position to maneuver the truck into alignment with the piping array connector arm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.