US3759552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic coupling with metallic sealing member
Assignee: Raychem Corp
•
Filing: 1970-09-08
•
Granted: 1973-09-18
•
Expires: 1990-09-08
Abstract
Abstract A hydraulic coupling is disclosed for connecting a hydraulic line to a hydraulic component such as a pump, compressor, cylinder or the like. The coupling consists of an adapter which fits into an opening in the hydraulic component. In order to form a leak-free joint between the adapter and the hydraulic component, a heat recoverable metallic sealing ring is placed between the surfaces. A heat recoverable sleeve is affixed to the hydraulic line and this sleeve mates with the adapter to form a seal. This seal results from the contact of a mating surface on the adapter and a corresponding mating surface on the sleeve. One of these mating surfaces projects inwardly toward the axis to permit a small amount of movement of this mating surface in the direction of the axis. A process is also disclosed whereby the metallic sealing ring is cooled below its transition temperature to convert it to a martensitic state only during installation.
Inventors
- 👤 R Levinsohn
- 👤 J Jervis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:37
CPC Classifications
C; C22; C22F; C22F1/00; C22F1/006; F; F16; F16L; F16L15/00; F16L15/04; C22C; C22C14/00; C22C19/00; C22C19/007; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/08; F16J15/0887; F16L19/00; F16L41/00; F16L41/08; F16L41/10; H; H01; H01R; H01R4/00; H01R4/58; Y; Y10; Y10S; Y10S285/00; Y10S285/917
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
133 words
A coupling for connecting a hydraulic tubing to a hydraulic component comprising: an adapter capable of being attached to said hydraulic component at its first end and having a sealing surface on its other end; a seal adapter to fit between said component and said adapter, said seal being made from a metal capable of being converted to a martensitic state at a temperature below the operating temperature of said coupling and existing in its austenitic state when at the operating temperature of said coupling; means for attaching said adapter to said component; a sleeve attached to said hydraulic tubing, said sleeve having a sealing surface adapted to mate with the sealing surface of said adapter; and means for holding said sleeve against said adapter to create a seal between said sealing surfaces.
Claim 2
Dependent Claim
133 words
A coupling for connecting a hydraulic tubing to a hydraulic component comprising: an adapter capable of being attached to said hydraulic component at its first end and having a sealing surface on its other end; a seal adapter to fit between said component and said adapter, said seal being made from a metal capable of being converted to a martensitic state at a temperature below the operating temperature of said coupling and existing in its austenitic state when at the operating temperature of said coupling; means for attaching said adapter to said component; a sleeve attached to said hydraulic tubing, said sleeve having a sealing surface adapted to mate with the sealing surface of said adapter; and means for holding said sleeve against said adapter to create a seal between said sealing surfaces.
Claim 3
Dependent Claim
30 words
The coupling of claim 1, wherein said means for attaching the adapter to the coupling comprises a threaded hole in said component and a corresponding threaded nipple in said adapter.
Claim 4
Dependent Claim
55 words
The coupling in claim 1, wherein said means for holding said sleeve against said adapter comprises an enlarged end portion on said sleeve, a coupling nut capable of fitting over the body of said sleeve, said nut having a threaded portion extending beyond said enlarged end portion and a corresponding threaded portion on said adapter.
Claim 5
Dependent Claim
20 words
The coupling of claim 1, wherein said seal is fabricated from an alloy containing major proportions of titanium and nickel.
Claim 6
Dependent Claim
26 words
The coupling of claim 4 wherein said alloy further contains a minor proportion of a metal selected from a group consisting of iron, aluminum, and manganese.
Claim 7
Dependent Claim
24 words
The coupling of claim 1 wherein said sleeve is heat recoverable and is fabricated from an alloy containing major proportions of titanium and nickel.
Claim 8
Dependent Claim
25 words
The coupling of claim 6 wherein said alloy contains a minor proportion of a metal selected from a group consisting of iron, aluminum and manganese.
Claim 9
Dependent Claim
19 words
The coupling of claim 1 wherein said seal is a V-ring and has at least one semi-circular sealing surface.
Claim 10
Dependent Claim
10 words
The coupling of claim 8 wherein said V-ring is symmetrical.
Claim 11
Dependent Claim
59 words
The coupling of claim 1 wherein said sealing surface of the adapter is borne by an arm extending radially inwardly from the periphery of an inner surface of said adapter adjacent one end thereof toward the longitudinal axis of said adapter and is hence capable of axial deflection with said arm upon connection of the adapter to said sleeve.
Claim 12
Dependent Claim
51 words
The coupling of claim 10 wherein the sealing surface of said adapter is provided with an outer circular projecting ring and wherein said heat recoverable sleeve is provided with a corresponding recessed portion to permit the contact of the sealing surface of said adapter with the sealing surface of said sleeve.
Claim 13
Dependent Claim
43 words
The coupling of claim 1 wherein said sleeve is provided with a circular projecting ring located between the sealing surface and a recessed portion of the sleeve and wherein said adapter is provided with a corresponding recessed portion adapted to receive said ring.
Claim 14
Dependent Claim
158 words
In an adapter suitable for connection of a hydraulic component to a hydraulic line, said adapter having an elongate body hollowed about a longitudinal axis thereof for the passage of fluid therealong, the improvement which comprises: an arm extending radially inwardly from the periphery of an inner surface of said body adjacent one end thereof toward said longitudinal axis, an axial projection on said arm extending toward said end and terminating in a circular radial sealing surface of diameter less than the diameter of said periphery, said projection being capable of axial deflection with said arm upon connection of the adapter to said line; and a ring integrally formed on said end of the adapter concentric about but of diameter greater than said circular radial sealing surface, and projecting axially outwardly beyond said sealing surface to define an annular space bounded by said ring, arm and projection and adapted to receive a sealing surface carried by said line.
Claim 15
Dependent Claim
158 words
In an adapter suitable for connection of a hydraulic component to a hydraulic line, said adapter having an elongate body hollowed about a longitudinal axis thereof for the passage of fluid therealong, the improvement which comprises: an arm extending radially inwardly from the periphery of an inner surface of said body adjacent one end thereof toward said longitudinal axis, an axial projection on said arm extending toward said end and terminating in a circular radial sealing surface of diameter less than the diameter of said periphery, said projection being capable of axial deflection with said arm upon connection of the adapter to said line; and a ring integrally formed on said end of the adapter concentric about but of diameter greater than said circular radial sealing surface, and projecting axially outwardly beyond said sealing surface to define an annular space bounded by said ring, arm and projection and adapted to receive a sealing surface carried by said line.
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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |