Expander for tubular elements
US8511133B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Nov 27, 2012 |
| Grant date | Aug 20, 2013 |
| Priority date | — |
| Expiry date | Nov 27, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/53878
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An expander includes a first head member, a rotating portion, a plurality of expanding members, and a tightening structure. The first head member and the rotating portion have conical faces corresponding to each other. The rotating portion has a threaded rod section which is screwed with the first head member. The expanding members are arranged around the two conical faces, and the expanding members tend to approach each other due to the tightening structure. When the rotating portion is rotated to approach the first head member, the expanding members are pushed outward to radially expand a tubular element. In addition, a plurality of restriction slots are formed on the conical face of the first head member, and each expanding member forms a corresponding rib slidably disposed in the restriction slot to improve stability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.