US3879043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing means
Assignee: CORRUGATED PACKING AND SHEET METAL CO Ltd
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Filing: 1973-04-12
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Granted: 1975-04-22
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Expires: 1993-04-12
Abstract
Abstract A means for sealing a joint between a pair of mating surfaces and of the kind of which in plan view is of closed profile, that is to say for instance of annular or rectangular shape - is proposed to have a hollow wall of ''''C'''' cross-section. The ends of the ''''C'''' are continued towards each other and are then turned inwardly within the confines of the ''''C'''' and subsequently away from each other. In this manner upper and lower terminal positions of substantially U-shape vertical section are provided and such a construction contributes to the efficiency of the seal which is obtained.
Inventors
- 👤 Michael John Caswell Tozer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:38
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/08; F16J15/0887; F16J15/0893
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
62 words
A sealing element for the purpose and of the kind referred to which is comprised of a wall of C-shaped cross-section forming a hollow section, end portions of the C shaped wall continuing towards each other and thence inwardly within the confines of the C-shaped wall and subsequently diverging apart from each other thereby providing upper and lower substantially U-shaped terminal segments.
Claim 2
Dependent Claim
62 words
A sealing element for the purpose and of the kind referred to which is comprised of a wall of C-shaped cross-section forming a hollow section, end portions of the C shaped wall continuing towards each other and thence inwardly within the confines of the C-shaped wall and subsequently diverging apart from each other thereby providing upper and lower substantially U-shaped terminal segments.
Claim 3
Dependent Claim
62 words
A sealing element for the purpose and of the kind referred to which is comprised of a wall of C-shaped cross-section forming a hollow section, end portions of the C shaped wall continuing towards each other and thence inwardly within the confines of the C-shaped wall and subsequently diverging apart from each other thereby providing upper and lower substantially U-shaped terminal segments.
Claim 4
Dependent Claim
62 words
A sealing element for the purpose and of the kind referred to which is comprised of a wall of C-shaped cross-section forming a hollow section, end portions of the C shaped wall continuing towards each other and thence inwardly within the confines of the C-shaped wall and subsequently diverging apart from each other thereby providing upper and lower substantially U-shaped terminal segments.
Claim 5
Dependent Claim
67 words
A sealing element in accordance with claim 1 wherein said upper and lower terminal segments are formed with adjaCent parts which abut one another with at least one of said adjacent parts being formed with undulations or grooves whereby fluid under pressure flow between surfaces being sealed is permitted to readily enter within said hollow wall to augment the sealing of the sealing element against said surfaces.
Claim 6
Dependent Claim
28 words
A sealing element in accordance with claim 1 wherein a plurality of substantially axial slots are formed in the upper and lower inwardly facing portions of said wall.
Claim 7
Dependent Claim
18 words
A sealing element in accordance with claim 1 wherein a C-shaped spring is disposed within said C-shaped wall.
Claim 8
Dependent Claim
25 words
A sealing element in accordance with claim 4 wherein said C-shaped spring is formed with an upper and a lower series of finger-defining axial slots.
Claim 9
Dependent Claim
26 words
A sealing element in accordance with claim 1 wherein a helical spring is provided in each of the upper and lower regions of said C-shaped wall.
Claim 10
Dependent Claim
19 words
A sealing element in accordance with claim 1 wherein said wall is bowed inwardly towards the terminal portions thereof.
Claim 11
Dependent Claim
15 words
A sealing element in accordance with claim 1 wherein said terminal segments are substantially cylindrically-shaped.
Claim 12
Dependent Claim
25 words
A sealing element in accordance with claim 1 wherein said C-shaped wall is inclined outwardly relative to a central axis of symmetry of said element.
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) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |