US3552407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of adjusting a butterfly valve seal
Assignee: Individual
•
Filing: 1968-12-11
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Granted: 1971-01-05
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Expires: 1988-12-11
Abstract
Abstract A butterfly valve characterized by the provision of a ring packing kept displaceably and deformably in place by either the valve seat or the butterfly leaf. The ring packing is of an elastomer in which a metal wire ring is embedded concentrically with the ring. A fibrous material may also be additionally embedded in the ring packing mounted in a radially opened peripheral groove formed on the valve seat or the butterfly leaf, in which the ring packing is displaceable. The metal wire ring facilitates restoring the ring packing elastically from an irregular compressed form to a proper regular form, for example, towards a true circle and/or to ease bringing the ring packing into a complete and proper closed position, without collapsing, buckling and/or yielding the metal wire ring.
Inventors
- 👤 Itsuro Hirano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:31
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22; F16K1/226; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/6031; Y10T137/6048; Y10T137/6052
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
105 words
In a method as recited in claim 1, said valve seat being said component which is made up of said body and cover, the step of turning said butterfly leaf to its fully open position, then removing said cover, axially positioning said ring packing on said body, and replacing said cover to retain said ring packing in said groove of said valve seat, whereupon said butterfly leaf is then repeatedly displaced between its closed and opened positions after said cover is brought into the position providing for the ring packing the relatively free radial movement during the repeatedly opening and closing of the butterfly leaf.
Claim 2
Dependent Claim
54 words
A method as recited in claim 1 and wherein said cover is initially tightened all the way to its final position engaging said body and is then backed away from said body to provide for the relatively free movement of said ring packing during the repeated opening and closing movement of the butterfly leaf.
Claim 3
Dependent Claim
76 words
A method as recited in claim 1 and wherein said butterfly leaf is said component which has said body and cover, the step of turning said butterfly leaf to its fully open position, then removing the cover, placing the ring packing on the body, and then replacing the cover of the butterfly leaf to provide for the relatively free radial movement of the ring packing during the repeated opening and closing movement of the butterfly leaf.
Claim 4
Dependent Claim
212 words
A method of setting a ring packing in a groove of a butterfly leaf of a butterfly valve as claimed in claim 1, in which: a cover forming an axial side of said groove is removable by unscrewing a bolt in engagement with said butterfly leaf; and the axial depth between both axial sides of said groove is such that said ring packing is retained in place in s said groove by friction but displaceable eccentrically in said groove by a radial force after said cover has been completely brought into a position in close contact with said butterfly leaf, comprising steps of: positioning said butterfly valve in its full open position: removing said cover by unscrewing said bolt; inserting said ring packing axially into said groove to the other side thereof formed on said butterfly leaf; placing said cover on said butterfly leaf by screwing said bolt down thereto but not tightly so that said ring packing is kept in place but easily displaceably; turning said butterfly leaf to the the full closed position; repeating opening and closing operations of said butterfly valve several times so that said ring packing adjusts on said valve seat; and screwing down said bolt completely so as to bring said cover into the first-named position.
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |