Alternate path indexing device
US7594542B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2006 |
| Grant date | Sep 29, 2009 |
| Priority date | — |
| Expiry date | Apr 15, 2027 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/10
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An embodiment of a method of shifting a valve between a plurality of flow condition positions, includes the steps of providing a mechanical indexer device in operational connection with a valve, the indexer device including a primary path defining a sequence through a plurality of valve positions at and between open and closed and a detent moveable along the primary path; providing at least one alternate path from a point along the primary path to a preceding position on the primary path along the sequence; shifting the valve to a subsequent position in the sequence; and shifting the valve to the preceding position in the sequence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.