One directional rotational lance indexer
US5560323A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 6, 1994 |
| Grant date | Oct 1, 1996 |
| Priority date | — |
| Expiry date | Dec 6, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF28G3/16
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A boiler cleaning device includes a frame mounting a carriage for moving a lance in and out of a boiler along said frame. The carriage is moved by a drive-chain which passes through a differentially geared set of sprockets, one of which carries a pinion rotating a ring gear mounted on a spindle portion of the lance. The spindle has a plurality of recesses each including an abutment and a ramp while the gear carries a spring loaded plunger which engages the abutment to rotate the spindle and the lance in one direction. When the drive is reversed to move the carriage backward, the gear rotates the other direction and the plunger merely rides up the ramps and down the abutments and the spindle does not rotate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.