Plug removal apparatus
US4793056A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 1987 |
| Grant date | Dec 27, 1988 |
| Priority date | — |
| Expiry date | Apr 20, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/53652
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A plug removal apparatus for removing a mechanical plug fixed in an end of each heat exchange tube of a heat exchanger includes a plug removing mechanism which engages with and pulls out a cylindrical member of the mechanical plug. The plug removing mechanism includes a mandrel insertable into and threadedly engageable with the cylindrical member, a push rod coaxially extending through the mandrel for pushing a cone member of the mechanical plug, an actuating means for selectively moving the mandrel and the push rod towards and from the mechanical plug, and a drive means for selectively rotating the mandrel into engagement with the cylindrical member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.