US3909017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing device
Assignee: Mecman AB
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Filing: 1973-11-27
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Granted: 1975-09-30
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Expires: 1993-11-27
Abstract
Abstract An elastic sealing ring inserted in a reversed T-shaped peripheral groove in a cylindrical surface has a cross section composed of a rounded head portion projecting slightly from the groove and dimensioned to leave a good clearance in relation to the opposite walls of the outer groove portion, a wider and substantially rectangular base portion dimensioned to be closely fitted in the undercut groove portion, and a narrower neck portion connecting the head portion symmetrically to one side of the base portion.
Inventors
- 👤 Hans B Engstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:25
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/065; F16K11/07; F16K11/0712
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
162 words
A sealing device comprising: a peripheral groove in a cylindrical surface, said groove having a reversed T-shaped cross section with an undercut groove portion and an outer groove portion; and a sealing ring of elastic material inserted in said groove, said sealing ring having its cross section composed of a rounded head portion extending slightly outside said groove to seal against an opposite cylindrical surface and dimensioned to be spaced at all portions thereof from opposite walls of said outer groove portion, an essentially wider and approximately rectangular base portion dimensioned to closely fit in said undercut groove portion, a neck portion narrower than said head portion connecting said head portion symmetrically to one side of said base portion, and a peripheral chute formed in said base portion of said ring closely adjacent each side of the central neck portion, said chutes having outer walls formed by raised beads on said base portion designed to be compressed in said undercut groove portion.
Claim 2
Dependent Claim
162 words
A sealing device comprising: a peripheral groove in a cylindrical surface, said groove having a reversed T-shaped cross section with an undercut groove portion and an outer groove portion; and a sealing ring of elastic material inserted in said groove, said sealing ring having its cross section composed of a rounded head portion extending slightly outside said groove to seal against an opposite cylindrical surface and dimensioned to be spaced at all portions thereof from opposite walls of said outer groove portion, an essentially wider and approximately rectangular base portion dimensioned to closely fit in said undercut groove portion, a neck portion narrower than said head portion connecting said head portion symmetrically to one side of said base portion, and a peripheral chute formed in said base portion of said ring closely adjacent each side of the central neck portion, said chutes having outer walls formed by raised beads on said base portion designed to be compressed in said undercut groove portion.
Claim 3
Dependent Claim
30 words
A sealing device as claimed in claim 1, wherein said base portion of said sealing ring is dimensioned to be subjected to a permanent prestressing in said undercut groove portion.
References Cited (Backward Citations)
US1083350A
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US2438153A
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US3089678A
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US3575431A
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US3630485A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |