Shaft and valve disc connection for butterfly valve
US5356116A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 1993 |
| Grant date | Oct 18, 1994 |
| Priority date | — |
| Expiry date | Oct 21, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K1/221
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An improved stub shaft to disc connection for a butterfly valve is provided having a valve disc with a hub. The valve disc is adapted to be rotated between an open and closed position. A valve disc seat is adapted to engage the valve disc in the closed position. A shaft is joined to the valve disc to permit torque to be transmitted to the valve disc from a point remote therefrom. The shaft is joined to the valve disc by forming the valve disc with a portion of increased thickness (hub) relative to the main portion of the disc. The portion of increased thickness is formed at a point adjacent the circumference of the disc. A hole (bore) is then machined into the portion of increased thickness parallel to the disc. The bore consists of a single larger aperture contiguous with a plurality of smaller apertures, the plurality of smaller apertures, positioned at a point more distal the circumference of the disc than the single larger aperture. The single larger aperture has a diameter slightly larger than the diameter of the shaft. The end of the shaft being inserted into the hub bore has mounted into it a plurality of dowels. The diameter, number and spatial placement of these dowels is …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.