Patent US1739318A successfully refreshed from Google Patents.
Patent US3752509A successfully refreshed from Google Patents.
US3752509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal-to-metal tube seal
Assignee: Caterpillar Inc
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Filing: 1971-12-20
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Granted: 1973-08-14
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Expires: 1991-12-20
Abstract
Abstract Two axially aligned tubes have clamped, annular sealing members mounted thereon to define convex and spherical surfaces maintained in line sealing contact.
Inventors
- 👤 W Stafford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:07
CPC Classifications
F; F16; F16L; F16L27/00; F16L27/02; F16L27/04; F16L27/053; Y; Y10; Y10S; Y10S285/00; Y10S285/917
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
97 words
A sealed joint comprising an annular first member, an annular second member positioned closely adjacent to said first member to normally dispose the longitudinal axes thereof in linear alignment, convex and spherical first and second surface portions respectively formed circumferentially and directly on each of said first and second members and circumferentially sealingly abutting each other in direct substantial line contact without interposition of another member, and attachment means for releasably attaching said first and second members together, the lengths of first and second radii, respectively defining such spherical first and second surface portions, being substantially equal.
Claim 2
Dependent Claim
97 words
A sealed joint comprising an annular first member, an annular second member positioned closely adjacent to said first member to normally dispose the longitudinal axes thereof in linear alignment, convex and spherical first and second surface portions respectively formed circumferentially and directly on each of said first and second members and circumferentially sealingly abutting each other in direct substantial line contact without interposition of another member, and attachment means for releasably attaching said first and second members together, the lengths of first and second radii, respectively defining such spherical first and second surface portions, being substantially equal.
Claim 3
Dependent Claim
51 words
The invention of claim 1 wherein said first and second surface portions are constructed and positioned to permit askew deviation of the longitudinal axis of said first member relative to the longitudinal axis of said second member while permitting said first and second surface portions to remain in substantial line contact.
Claim 4
Dependent Claim
31 words
The invention of claim 2 wherein said first and second surface portions are constructed and positioned to permit a maximum askew deviation between said axes of at least approximately 6* .
Claim 5
Dependent Claim
24 words
The invention of claim 2 further comprising compensating means formed on said second member and on said attachment means for permitting such askew deviation.
Claim 6
Dependent Claim
47 words
The invention of claim 4 wherein said compensating means comprises coNcave and spherical surface portions formed circumferentially and internally on said attachment means mating with convex and spherical surface portions formed circumferentially and second member in axial spaced apart relationship with respect to said second surface portions.
Claim 7
Dependent Claim
35 words
The invention of claim 1 further comprising locking means formed on said second member and on said attachment means for locking said first and second members in position with their longitudinal axes in linear alignment.
Claim 8
Dependent Claim
39 words
The invention of claim 6 wherein said locking means comprises abutting, cylindrical surface portions, disposed in parallel relationship relative to the longitudinal axis of said second member, formed internally on said attachment means and externally on said second member.
Claim 9
Dependent Claim
45 words
The invention of claim 1 wherein a first center for said first radius is disposed internally of said first member and a second center for said second radius is disposed externally of said second member in substantial axially spaced relationship relative to said first center.
Claim 10
Dependent Claim
32 words
The invention of claim 1 wherein an imaginary straight line intersecting the centers of said first and second radii also intersects the line of contact between said first and second surface portions.
Claim 11
Dependent Claim
35 words
The invention of claim 1 wherein an imaginary straight line intersecting the centers of said first and second radii forms an angle of approximately 65* with respect to the longitudinal axis of said first member.
Claim 12
Dependent Claim
24 words
The invention of claim 1 wherein a circumferential segment defining each of said first and second surface portions by said radii approximates 30* .
Claim 13
Dependent Claim
45 words
The invention of claim 1 further comprising a tube attached internally of each of said first and second members and normally disposed in substantial linear alignment and wherein said attachment means comprises an annular flange member mounted on each of said first and second members.
Claim 14
Dependent Claim
20 words
The invention of claim 12 wherein said attachment means further comprises circumferentially disposed bolt means securing said flange members together.
Claim 15
Dependent Claim
16 words
The invention of claim 1 wherein said line of contact has a width approximating 1/8 inch.
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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |