Variable seat check valve
US4086936A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 16, 1976 |
| Grant date | May 2, 1978 |
| Priority date | — |
| Expiry date | Aug 16, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/791
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Apparatus for use in a reciprocating pump wherein a one-way check valve opens to admit fluid from a reservoir during the pump upstroke and a second one-way check valve opens to expel fluid from the pump during the downstroke. The apparatus includes a valve seat having a frusto-conical shape and formed from resilient material, and a spherical metallic ball, together with a rigid seat edge liner for restricting the seat resilient expansion. In operation, the invention enables the check valve in the check position to automatically compensate for excessive forces against the ball by distributing these forces over a variable spherical ball/seat surface to provide a predetermined maximum pressure on the valve seat.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.