Patent US3572731A successfully refreshed from Google Patents.
US3572731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flange seal
Assignee: Goetzewerke Friedrich Goetze AG
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Filing: 1968-11-19
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Granted: 1971-03-30
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Expires: 1988-11-19
Abstract
Abstract A flange seal for use in sealing flanges between internalcombustion engine parts and the like comprises a sheath member having a channel shaped cross section including two planar arms, a generally U-shaped intermediate portion connecting the arms, resilient supporting means located between the arms, the arms of the sheath, but not the connecting portion being engaged with the flanges of the joint to be sealed.
Inventors
- 👤 Friedhelm Stecher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:53
CPC Classifications
F; F16; F16L; F16L23/00; F16L23/16; F16L23/18; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/10; F16J15/12; F16J15/121; F16J15/122; F16J15/123
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
145 words
In a flange seal subjectable to hot combustion gases and high pressures for sealing the joint between planar flange surfaces of adjacent parts of internal-combustion engines and the like of the tYpe comprising a metallic channel-shaped sheath element having in cross section at its free ends a pair of planar arms and a resilient supporting element disposed between the planar arms the improvement in which only the planar arms of the sheath element are in contact with the adjacent flange surfaces, in which the portion of the sheath element connecting said arms is out of contact with the adjacent flanges in the operative position, and in which the resilient supporting element is present between the planar arms up to, and not beyond, the point at which the contact between the sheath element and the flange surfaces is lost with the beginning of the connecting portion.
Claim 2
Dependent Claim
145 words
In a flange seal subjectable to hot combustion gases and high pressures for sealing the joint between planar flange surfaces of adjacent parts of internal-combustion engines and the like of the tYpe comprising a metallic channel-shaped sheath element having in cross section at its free ends a pair of planar arms and a resilient supporting element disposed between the planar arms the improvement in which only the planar arms of the sheath element are in contact with the adjacent flange surfaces, in which the portion of the sheath element connecting said arms is out of contact with the adjacent flanges in the operative position, and in which the resilient supporting element is present between the planar arms up to, and not beyond, the point at which the contact between the sheath element and the flange surfaces is lost with the beginning of the connecting portion.
Claim 3
Dependent Claim
49 words
The structure of claim 1 in which the intermediate connecting portion of the sheath is generally U-shaped in cross section and in which the spacing of the legs of the U decreases from the region of the planar arms to a curved area joining the legs of the U.
Claim 4
Dependent Claim
23 words
The structure of claim 2 in which the said U-shaped cross section tapers uniformly from said planar arms to the said curved area.
Claim 5
Dependent Claim
28 words
The structure of claim 2 in which the legs of the said U decreases in spacing in steps between the said planar arms and the said curved area.
Claim 6
Dependent Claim
33 words
The structure of claim 2 in which one leg of the said U-shaped connecting portion is substantially planar with the adjacent planar arm and the other leg extends to the other planar arm.
Claim 7
Dependent Claim
18 words
The structure of claim 1 in which the intermediate connecting area extends into a chamber to be sealed.
Claim 8
Dependent Claim
80 words
The structure of claim 1 in which a constriction is formed in the sheath element adjacent each of the planar arms and extends toward the opposite planar arm and in which the resilient means have greater cross-sectional dimensions than the distance between the constrictions in the engaged position of the seal and are positioned in engagement with the planar arms and the constrictions but not said connecting portion whereby the resilient supporting element is held in position by the constrictions.
Claim 9
Dependent Claim
14 words
The structure of claim 1 in which the resilient means is a sealing gasket.
Claim 10
Dependent Claim
14 words
The structure of claim 1 in which the resilient means is a spring element.
Claim 11
Dependent Claim
30 words
The structure of claim 1 in which the resilient means is a coil spring arranged with its axis substantially parallel to the plane of the arms of the sheath element.
Claim 12
Dependent Claim
34 words
The structure of claim 1 in which the sheath element comprises separate plates, each having an arm portion and a connecting portion, and means joining the edges of the connecting portion of each plate.
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) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |