Butterfly valve assembly
US5207411A · kind A · utility
Inventor
Key dates
| Filing date | Sep 30, 1992 |
| Grant date | May 4, 1993 |
| Priority date | — |
| Expiry date | Sep 30, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K1/2265
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An industrial butterfly valve for use in a fluid flow line is provided having a tubular housing with a disc valve and stem mounted for pivotal movement within the flow passage found in the housing. The assembly employs a unique bolt retention component that functions to prevent back out of the bolts holding the disc to the stem and further functions to prevent leakage around the bolts. A resilient seat around the interior periphery of the flow passage provides a positive seal when the disc is rotated to a closed position the resilient seat having a pair of annular bias springs molded into the mounting edges so as to retain its shape and resist peeling or distortion upon assembly and disassembly in a flow line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.