Patent US3717351A successfully refreshed from Google Patents.
US3717351A
Expired / Lapsed
US
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Seal
Assignee: MICRODT Inc
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Filing: 1971-04-19
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Granted: 1973-02-20
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Expires: 1991-04-19
Abstract
Abstract An annular seal for a shaft is built up in sandwich form comprising a central washer-like sealing element and a pair of rigid side wall elements on opposite sides thereof. The side wall elements on their radially inner edge have parallel sloping surfaces which deflect the inner edge portion of the sealing element to form a lip for sealing a shaft. The sealing element extends beyond the radially outer edge of the side wall elements to form a seal with the base of a groove in which the sealing unit is supported.
Inventors
- 👤 J Liebig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:49
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3204; F16J15/3228
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
108 words
A seal comprising a pair of flat side wall rigid elements, a flat elastomeric sealing element supported between said side wall elements and extending radially from one edge across said elements and beyond the other edge so as to present oppositely extending sealing edges, and means for securing said sealing element between said side wall elements which are spaced from each other thereby, the inner edge portion of the side wall elements slope in the same direction axially for deflecting the extending inner edge of the sealing element out of the plane thereof to form a pointed sealing lip which provides line engagement with a shaft sealed thereby.
Claim 2
Dependent Claim
108 words
A seal comprising a pair of flat side wall rigid elements, a flat elastomeric sealing element supported between said side wall elements and extending radially from one edge across said elements and beyond the other edge so as to present oppositely extending sealing edges, and means for securing said sealing element between said side wall elements which are spaced from each other thereby, the inner edge portion of the side wall elements slope in the same direction axially for deflecting the extending inner edge of the sealing element out of the plane thereof to form a pointed sealing lip which provides line engagement with a shaft sealed thereby.
Claim 3
Dependent Claim
108 words
A seal comprising a pair of flat side wall rigid elements, a flat elastomeric sealing element supported between said side wall elements and extending radially from one edge across said elements and beyond the other edge so as to present oppositely extending sealing edges, and means for securing said sealing element between said side wall elements which are spaced from each other thereby, the inner edge portion of the side wall elements slope in the same direction axially for deflecting the extending inner edge of the sealing element out of the plane thereof to form a pointed sealing lip which provides line engagement with a shaft sealed thereby.
Claim 4
Dependent Claim
108 words
A seal comprising a pair of flat side wall rigid elements, a flat elastomeric sealing element supported between said side wall elements and extending radially from one edge across said elements and beyond the other edge so as to present oppositely extending sealing edges, and means for securing said sealing element between said side wall elements which are spaced from each other thereby, the inner edge portion of the side wall elements slope in the same direction axially for deflecting the extending inner edge of the sealing element out of the plane thereof to form a pointed sealing lip which provides line engagement with a shaft sealed thereby.
Claim 5
Dependent Claim
57 words
A seal as recited in claim 1, wherein said securing means comprises a plurality of pins secUred to and extending from the inner face of one of said wall elements in alignment with recesses in the other wall element, and wherein the sealing element has apertures through which said pins extend when sandwiched between said wall elements.
Claim 6
Dependent Claim
52 words
A seal as recited in claim 2. wherein said flat side wall and sealing elements are substantially the same thickness and are circular in form to permit a shaft to extend therethrough and be sealed by the inner sealing lip thereof the deflection of which provides a line contact with the shaft.
Claim 7
Dependent Claim
59 words
A seal as recited in claim 2, wherein said side wall and sealing elements are substantially the same thickness and are semi-circular in form for sealing a journal of a crankshaft when disposed in a groove in the supporting members therefor, the deflection of the extending inner edge of the sealing element providing a line contact with the shaft.
References Cited (Backward Citations)
US3123367A
Cited
US2616735A
Cited
US3362719A
Cited
US3480286A
Cited
US3462803A
Cited
US3601417A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |