US4243203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Butterfly valve
Assignee: Dwyer Instruments LLC
•
Filing: 1979-07-20
•
Granted: 1981-01-06
•
Expires: 1999-07-20
Abstract
Abstract A butterfly valve disk plate having a plurality of fluid directing ribs extending from the disc perpendicular to the plane of the disk, the ribs on one side of the disk being located opposite the spaces between the ribs on the other side of the disk and the ribs on one half of one side of the disk being staggered with respect to the ribs on the other half of the same side of the disk.
Inventors
- 👤 Lawrence W. Mack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:23
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22; F16K1/222
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
198 words
In a butterfly valve assembly comprising a valve plate disk having a first side and a second side, said valve plate disk being adapted for rotation about an axis of said valve plate disk whereby said valve assembly may be opened and closed, the improvement comprising: a valve plate disk provided with a plurality of fluid directing ribs on each side thereof, the length of which lie perpendicular to said axis of rotation, which ribs project perpendicular from the plane of the valve plate disk and which ribs extend only from a location proximate the axis of rotation to a location proximate the edge of said valve plate disk; wherein the ribs located on one side of said valve plate disk are alternately located on one side of said axis and then the other side of said axis as one proceeds along said axis from one end thereof to the other, each rib being equally spaced from the rib above it and the rib below it, and wherein the ribs located on said second side of said valve plate disk are located opposite the spaces between the ribs located on said first side of said valve plate disk.
Claim 2
Dependent Claim
198 words
In a butterfly valve assembly comprising a valve plate disk having a first side and a second side, said valve plate disk being adapted for rotation about an axis of said valve plate disk whereby said valve assembly may be opened and closed, the improvement comprising: a valve plate disk provided with a plurality of fluid directing ribs on each side thereof, the length of which lie perpendicular to said axis of rotation, which ribs project perpendicular from the plane of the valve plate disk and which ribs extend only from a location proximate the axis of rotation to a location proximate the edge of said valve plate disk; wherein the ribs located on one side of said valve plate disk are alternately located on one side of said axis and then the other side of said axis as one proceeds along said axis from one end thereof to the other, each rib being equally spaced from the rib above it and the rib below it, and wherein the ribs located on said second side of said valve plate disk are located opposite the spaces between the ribs located on said first side of said valve plate disk.
Claim 3
Dependent Claim
35 words
The improvement according to claim 1 wherein the height of said ribs is greatest near said axis and the height tapers gradually toward the edge of said valve plate disk where the height is least.
References Cited (Backward Citations)
DE362690C
Cited
DE37481C
Cited
US813771A
Cited
US1131371A
Cited
US1594374A
Cited
DE699819C
Cited
US2986373A
Cited
DE1083611B
Cited
GB881436A
Cited
US3096071A
Cited
US3330177A
Cited
US3591133A
Cited
US4032108A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-06 | 1984-07-07 | 1985-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-06 | 1988-07-07 | 1989-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-06 | 1992-07-07 | 1993-01-06 | $7700.00 | Window Closed / Lapsed |