US3990675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Butterfly valve
Assignee: Applications Mecaniques et Robinetterie Industrielle AMRI
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Filing: 1974-12-10
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Granted: 1976-11-09
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Expires: 1994-12-10
Abstract
Abstract A butterfly valve for pipes having smooth ends comprising a body constituted by a metal casing of generally tubular shape with two dimensional bosses provided with coaxial passages. A layer of elastomer material externally and internally envelops the totality of the metal casing. Two shafts are rotatably mounted in the coaxial passages and support a butterfly within the body. The body includes at one of the extremities thereof an end portion which permits connection of the valve to a pipe by interfitting thereof. The other end of the body can be connected in various ways with the other pipe either as a male or a female fitting with associated annular lips.
Inventors
- 👤 Maurice Bonafous
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:03
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22; F16L; F16L47/00; F16L47/06; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/7036
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
114 words
A butterfly valve for pipes having smooth ends, said valve comprising a body constituted by a metal casing of generally tubular shape with two integral diametral bosses extending generally radially outwardly therefrom, said bosses being respectively provided with two coaxial passages, a layer of elastomer material externally and internally enveloping the totality of said casing and substantially externally the totality of said bosses, a butterfly valve disc, two shafts supporting said butterfly valve disc and rotatably mounted in said passages, and means for pivoting and sealing said shafts in said passages, said body including at one of the extremities thereof an end portion permitting connection of the valve to a pipe by interfitting therewith.
Claim 2
Dependent Claim
114 words
A butterfly valve for pipes having smooth ends, said valve comprising a body constituted by a metal casing of generally tubular shape with two integral diametral bosses extending generally radially outwardly therefrom, said bosses being respectively provided with two coaxial passages, a layer of elastomer material externally and internally enveloping the totality of said casing and substantially externally the totality of said bosses, a butterfly valve disc, two shafts supporting said butterfly valve disc and rotatably mounted in said passages, and means for pivoting and sealing said shafts in said passages, said body including at one of the extremities thereof an end portion permitting connection of the valve to a pipe by interfitting therewith.
Claim 3
Dependent Claim
40 words
A valve as claimed in claim 1 wherein said elastomer material is relatively hard, said valve further comprising a seat for said butterfly valve disc supported by the elastomer covered body, said seat being constituted of a relatively flexible elastomer.
Claim 4
Dependent Claim
24 words
A valve as claimed in claim 1, in which said metal casing is provided with through holes which are filled with said elastomer material.
Claim 5
Dependent Claim
29 words
A valve as claimed in claim 1, in which said casing is machined solely for the passages for said shafts and is covered with said elastomer material by moulding.
Claim 6
Dependent Claim
15 words
A valve as claimed in claim 1 wherein said end portion comprises a male connection.
Claim 7
Dependent Claim
15 words
A valve as claimed in claim 1 wherein said end portion comprises a female connection.
Claim 8
Dependent Claim
23 words
A valve as claimed in claim 1 herein said elastomer material includes at least one asymmetrical lip for sealing an associated pipe end.
Claim 9
Dependent Claim
35 words
A valve as claimed in claim 7 wherein said lip is annular and has a steep side facing the butterfly valve disc to provide sealing of the interior of the associated pipe towards the outside.
Claim 10
Dependent Claim
37 words
A valve as claimed in claim 7 wherein said lip is annular and has a steep side facing towards the interior of an associated pipe to provide sealing from the outside to the inside of the pipe.
Claim 11
Dependent Claim
28 words
A valve as claimed in claim 7 wherein the end portion is a male portion and a plurality of said lips are externally disposed on said male portion.
Claim 12
Dependent Claim
28 words
A valve as claimed in claim 7 wherein the end portion is a female portion and a plurality of said lips are internally disposed on said female portion.
Claim 13
Dependent Claim
53 words
A valve as claimed in claim 1 in combination with a tubular boss member engaging said body, a tubular spacer, a sleeve surrounding and engaging said boss member and tubular spacer to said body, said sleeve slidably receiving one of said pipes, and means for lodging said sleeve on said tubular boss member.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-09 | 1980-05-10 | 1980-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-09 | 1984-05-10 | 1984-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-09 | 1988-05-10 | 1988-11-09 | $7700.00 | Window Closed / Lapsed |