Drop check valve
US4039003A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 6, 1976 |
| Grant date | Aug 2, 1977 |
| Priority date | — |
| Expiry date | Apr 6, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7937
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A drop check valve for choke and kill manifolds which has easily replaceable components therein. The valve apparatus includes a bonnet which houses a replaceable seat member within which a dart is reciprocatingly received. The dart has a seat engaging surface formed thereon which is a frustum of a cone and moves lengthwise of its axis when closing against a conical seat of the removable seat assembly, so that the dart engages the seat to prevent bidirectional fluid flow therethrough. A replaceable seal circumferentially extends about the cone of the dart to improve the sealing action between the dart and its seat. The seat assembly is provided with radially spaced-apart ports connected to an outlet passageway and fluid flow can only occur through an inlet passageway, up through the seat, into the seat assembly, through the radial ports, and out through the outlet passageway.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.