Poppet valve
US4712619A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1986 |
| Grant date | Dec 15, 1987 |
| Priority date | — |
| Expiry date | Jul 30, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7855
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The improved poppet valve of the present invention comprises a simpler and shorter valve which meets or exceeds prior art performance characteristics while being easier and cheaper to make and to fabricate into a float collar or float shoe. The improved poppet valve of the present invention comprises a tubular one-piece body having flange means on the exterior thereof, and a downward-facing valve seat at the bottom interior thereof, with a valve guide spider thereabove. A dome-shaped poppet valve seats on the aforesaid valve seat, and has coaxially secured thereto a upwardly extending stem bolt which protrudes through and above the valve body guide spider. A spring disposed about the stem bolt biases it upwardly, acting on the top surface of the spider and on a lower surface of a spring retention cap secured to the top of the stem bolt. In such a manner, the poppet valve is biased into engagement with the valve body seat at the lower end of the valve assembly. The poppet valve of the present invention may be employed in a section of casing or in a guide shoe to form a float collar or float shoe, respectively, wherein the valve assembly is secured in place by a cement sheath.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.