Patent US3675681A successfully refreshed from Google Patents.
US3675681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three-position butterfly valve
Assignee: Eaton Corp
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Filing: 1970-08-03
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Granted: 1972-07-11
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Expires: 1990-08-03
Abstract
Abstract A butterfly fluid flow valve having a full-on, full-off, and an intermediate flow position. The intermediate flow position is provided by a bleed port formed in the butterfly element which can be closed off by contact of the butterfly element with a transverse wall portion formed within the valve body. The sealing lip of the butterfly element is adapted to seal against the interior wall of the valve body in the intermediate flow position to leave only the bleed port open.
Inventors
- 👤 Frank E Obermaier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:49
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86734; Y10T137/86743
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
103 words
A fluid flow valve comprising a housing having an internal cylindrical bore of one diameter extending along one end portion of said housing and a Larger diameter cylindrical bore extending along the opposite end portion of said housing, a portion of the intersection of said bores defining a flat transverse wall portion; a shaft extending transversely of said larger diameter bore; a butterfly valve element carried by said shaft and having a sealing lip having wiping engagement with said larger diameter bore, said butterfly valve element having an orifice formed therein and closed by contact of said element with said transverse wall portion.
Claim 2
Dependent Claim
103 words
A fluid flow valve comprising a housing having an internal cylindrical bore of one diameter extending along one end portion of said housing and a Larger diameter cylindrical bore extending along the opposite end portion of said housing, a portion of the intersection of said bores defining a flat transverse wall portion; a shaft extending transversely of said larger diameter bore; a butterfly valve element carried by said shaft and having a sealing lip having wiping engagement with said larger diameter bore, said butterfly valve element having an orifice formed therein and closed by contact of said element with said transverse wall portion.
Claim 3
Dependent Claim
32 words
The fluid flow valve of claim 1, in which said butterfly element is made from a resilient material compressible upon engagement with said larger diameter bore and with said transverse wall portion.
Claim 4
Dependent Claim
34 words
The fluid flow valve of claim 1, in which said sealing lip is adapted to sealingly engage a portion of said bore when said butterfly element is out of contact with said transverse wall.
Claim 5
Dependent Claim
22 words
The fluid flow valve of claim 1, in which said smaller diameter bore is parallel but eccentric to said larger diameter bore.
Claim 6
Dependent Claim
25 words
The fluid flow valve of claim 5, in which said outlet conduit means is cylindrical and is parallel but eccentric to said valve seat chamber.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |