US3971566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic sealing member and process
Assignee: Raychem Corp
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Filing: 1975-01-06
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Granted: 1976-07-27
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Expires: 1995-01-06
Abstract
Abstract Disclosed herein is a metallic V-ring sealing member capable of sealing hydraulic fluid against egress from a hydraulic system. The sealing member of the invention is fabricated from a metal capable of undergoing an austenitic to martensitic state change upon cooling below a transition temperature and of undergoing a further transformation from martensitic to austenitic state upon warming to a temperature of less than the operating temperature of the system. By the process of the invention, a hydraulic system may be sealed by cooling the sealing member of the invention below its transition temperature, placing the sealing member in sealing relationship to the parts of the system to be sealed and warming the sealing member to effect a transformation from its martensitic state to its austenitic state.
Inventors
- 👤 Richard Levinsohn, deceased
- 👤 administrator-with-will-annexed Joseph Levinson
- 👤 James E. Jervis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:19
CPC Classifications
F; F16; F16L; F16L41/00; F16L41/08; F16L41/10; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/08; F16J15/0887; F16J15/16; F16J15/164; F16L19/00; F16L19/02; F16L19/0206; Y; Y10; Y10S; Y10S277/00; Y10S277/931; Y10S277/933
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
149 words
A metallic V-ring sealing member capable of sealing hydraulic fluid against egress from a hydraulic system having an operating temperature range within the range of from about -54°C to about 232°C, said sealing member being formed from a metal alloy which (A) undergoes transition from an austenitic state to a martensitic state when cooled below a transition temperature, said temperature being below about -60°C (b) undergoes a further transition from the martensitic to the austenitic state upon warming from below said temperature to a temperature less than the operating temperature of said system, (c) remains in the austenitic state within the operating temperature range, and (d) is weaker in its martensitic state than in its austenitic state whereby a seal may be formed between a sealing surface of the sealing member and a sealing surface of the hydraulic system with substantially no galling or scratching of either sealing surface.
Claim 2
Dependent Claim
149 words
A metallic V-ring sealing member capable of sealing hydraulic fluid against egress from a hydraulic system having an operating temperature range within the range of from about -54°C to about 232°C, said sealing member being formed from a metal alloy which (A) undergoes transition from an austenitic state to a martensitic state when cooled below a transition temperature, said temperature being below about -60°C (b) undergoes a further transition from the martensitic to the austenitic state upon warming from below said temperature to a temperature less than the operating temperature of said system, (c) remains in the austenitic state within the operating temperature range, and (d) is weaker in its martensitic state than in its austenitic state whereby a seal may be formed between a sealing surface of the sealing member and a sealing surface of the hydraulic system with substantially no galling or scratching of either sealing surface.
Claim 3
Dependent Claim
28 words
The member of claim 1 wherein the member is provided with an arcuate surface at one end of the V and a bead at the other end thereof.
Claim 4
Dependent Claim
23 words
The member of claim 1 wherein the member is provided with an arcuate surface and a bead at each end of the V.
Claim 5
Dependent Claim
15 words
The member of claim 1 wherein said V-ring has at least one semi-circular sealing surface.
Claim 6
Dependent Claim
10 words
The member of claim 4 wherein said V-ring is symmetrical.
Claim 7
Dependent Claim
149 words
A metallic V-ring sealing member capable of sealing hydraulic fluid against egress from a hydraulic system having an operating temperature range within the range of from about -54°C to about 232°C, said sealing member being formed from a metal alloy whch (a) undergoes transition from an austenitic state to a martensitic state when cooled below a transition temperature, said temperature being below about 60°C (b) undergoes a further transition from the martensitic to the austenitic state upon warming from below said temperature to a temperature less than the operating temperature of said system, (c) remains in the austenitic state within the operating temperature range, and (d) is weaker in its martensitic state than in its austenitic state whereby a seal may be formed between a sealing surface of the sealing member and a sealing surface of the hydraulic system with substantially no galling or scratching of either sealing surface.
Claim 8
Dependent Claim
149 words
A metallic V-ring sealing member capable of sealing hydraulic fluid against egress from a hydraulic system having an operating temperature range within the range of from about -54°C to about 232°C, said sealing member being formed from a metal alloy whch (a) undergoes transition from an austenitic state to a martensitic state when cooled below a transition temperature, said temperature being below about 60°C (b) undergoes a further transition from the martensitic to the austenitic state upon warming from below said temperature to a temperature less than the operating temperature of said system, (c) remains in the austenitic state within the operating temperature range, and (d) is weaker in its martensitic state than in its austenitic state whereby a seal may be formed between a sealing surface of the sealing member and a sealing surface of the hydraulic system with substantially no galling or scratching of either sealing surface.
Claim 9
Dependent Claim
26 words
The member of claim 6 wherein said alloy further contains a minor proportion of a metal selected from the group consisting of iron aluminum and manganese.
Claim 10
Dependent Claim
28 words
The member of claim 6 wherein the member is provided with an arcuate surface at one end of the V and a bead at the other end thereof.
Claim 11
Dependent Claim
23 words
The member of claim 6 wherein the member is provided with an arcuate surface and a bead at each end of the V.
Claim 12
Dependent Claim
15 words
The member of claim 6 wherein said V-ring has at least one semi-circular sealing surface.
Claim 13
Dependent Claim
10 words
The member of claim 10 wherein said V-ring is symmetrical.
References Cited (Backward Citations)
FR683333A
Cited
US3007721A
Cited
US3098662A
Cited
US3174851A
Cited
US3273918A
Cited
US3637223A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-27 | 1980-01-26 | 1980-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-27 | 1984-01-26 | 1984-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-27 | 1988-01-26 | 1988-07-27 | $7700.00 | Window Closed / Lapsed |