US4111441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-arresting sealing ring
Assignee: Carl Freudenberg KG
•
Filing: 1977-03-07
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Granted: 1978-09-05
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Expires: 1997-03-07
Abstract
Abstract A sealing ring for a piston moving within a cylinder made up of an elastomeric part and a stiff support part, the ring being x-shaped in cross section, two legs of the elastomeric part, of the same radius, constituting the dynamic seal and a third leg constituting the static seal. The fourth leg is made up by the support part and projects radially beyond the third leg so as to lock into a corresponding recess is the piston or cylinder. An indentation about the circumference of the fourth leg facilitates its resilient flexing to make the initial lock. Advantageously the axial body of the seal between the legs is substantially cylindrical.
Inventors
- 👤 Hans-Hermann Sick
- 👤 Erich Habel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:49
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3268; Y; Y10; Y10S; Y10S277/00; Y10S277/925
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
128 words
A self-arresting seal ring for machine parts moving relatively to one another, comprising an elastomeric part and a support part fixedly connected thereto, the sealing ring having an x-shaped cross-section, two limbs of of the elastomeric part lying on the same circumference and being constructed as dynamically acting sealing lips, a third limb of the elastomeric part being constructed as a statically acting sealing lip, and the fourth limb being formed from the support part and having a supporting edge projecting radially beyond the third limb and being resilient in such radial direction so as to be able to flex and lock into a suitable recess in one of the machine parts and means defining a predetermined breaking line on the support part adjacent to the supporting edge.
Claim 2
Dependent Claim
128 words
A self-arresting seal ring for machine parts moving relatively to one another, comprising an elastomeric part and a support part fixedly connected thereto, the sealing ring having an x-shaped cross-section, two limbs of of the elastomeric part lying on the same circumference and being constructed as dynamically acting sealing lips, a third limb of the elastomeric part being constructed as a statically acting sealing lip, and the fourth limb being formed from the support part and having a supporting edge projecting radially beyond the third limb and being resilient in such radial direction so as to be able to flex and lock into a suitable recess in one of the machine parts and means defining a predetermined breaking line on the support part adjacent to the supporting edge.
Claim 3
Dependent Claim
23 words
A self-arresting sealing ring according to claim 1, wherein the support part is formed of metal or of a hard and tough plastic.
Claim 4
Dependent Claim
36 words
A self-arresting sealing ring according to claim 1, wherein the means defining the predetermined breaking line comprises that portion of the support part which has the supporting edge divided into segments by indentations about its circumference.
Claim 5
Dependent Claim
21 words
A self-arresting sealing ring according to claim 1, wherein the sealing ring has a substantially cylindrical cross-section between the sealing lips.
Claim 6
Dependent Claim
51 words
A self-arresting sealing ring according to claim 4, wherein the support part is formed of metal or a hard and tough plastic, and wherein the means defining the predetermined breaking line comprises that portion of the support part which has the supporting edge divided into segments by indentations about its circumference.
Claim 7
Dependent Claim
18 words
A self-arresting sealing ring according to claim 1, having the dynamically acting sealing lips disposed on its outside.
Claim 8
Dependent Claim
18 words
A self-arresting sealing ring according to claim 1, having the dynamically acting sealing lips disposed on its inside.
Claim 9
Dependent Claim
44 words
In combination, a shaft moving within a cylinder, an a self-arresting sealing ring according to claim 1 forming a seal therebetween, one of said shaft and said cylinder being provided with a recess for receiving said fourth limb and thereby locking said ring thereto.
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) | 1981-09-04 | 1982-03-06 | 1982-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-04 | 1986-03-06 | 1986-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-04 | 1990-03-06 | 1990-09-05 | $7700.00 | Window Closed / Lapsed |