US3695641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube fitting having tapered access opening and closure plug
Assignee: Caterpillar Inc
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Filing: 1970-09-02
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Granted: 1972-10-03
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Expires: 1990-09-02
Abstract
Abstract In an elbow fitting for receiving an expandible tube, an access opening is provided to permit internal access to the tube opening for an expander tool, the access opening having an outwardly converging, tapered bore with a tapered plug being arranged in the access opening after the tube is secured within the tube opening in order to seal the fitting.
Inventors
- 👤 Frederick S Engelking
- 👤 Calvin D Loyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:11
CPC Classifications
F; F16; F16L; F16L43/00; F16L43/001; F16L43/005; F16L41/00; F16L41/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
129 words
A fitting for expansible sealing engagement with a tubular member and bolt sealing engagement with a second member comprising: a. a passage through said fitting having a tube receiving end and a smooth, outwardly tapered plug receiving end; b. a third lateral opening, the axis of which intersects the axis of said passage and which opening terminates in an external sealing face, the diameter of said plug receiving end being smaller than the diameter of said lateral opening; c. bolt means through said fitting to seal said face to said second member; and d. an unthreaded tapered plug having sealing means of a diameter less than the diameter of said third opening and of sufficient diameter to seat and seal in said plug receiving end upon pressure application thereto.
Claim 2
Dependent Claim
129 words
A fitting for expansible sealing engagement with a tubular member and bolt sealing engagement with a second member comprising: a. a passage through said fitting having a tube receiving end and a smooth, outwardly tapered plug receiving end; b. a third lateral opening, the axis of which intersects the axis of said passage and which opening terminates in an external sealing face, the diameter of said plug receiving end being smaller than the diameter of said lateral opening; c. bolt means through said fitting to seal said face to said second member; and d. an unthreaded tapered plug having sealing means of a diameter less than the diameter of said third opening and of sufficient diameter to seat and seal in said plug receiving end upon pressure application thereto.
Claim 3
Dependent Claim
26 words
The fitting of claim 1 wherein the tube opening is formed as a cylindrical bore having axially spaced apart grooves into which a tube is expanded.
Claim 4
Dependent Claim
34 words
The fitting of claim 1 wherein the plug has a groove circumferentially formed in its tapered surface, a flexible O-ring being arranged in the groove to provide a hermetic seal with the tapered bore.
Claim 5
Dependent Claim
33 words
The fitting of claim 1 wherein at least a circumferential portion of the tapered plug surface is deformable for intimately mating with the tapered bore to secure the plug within the access opening.
Claim 6
Dependent Claim
28 words
The fitting of claim 1 wherein the tapered plug surface has a plurality of circumferentially arranged, axially spaced apart, deformable ridges for intimately mating with the tapered bore.
Claim 7
Dependent Claim
16 words
The fitting of claim 1 wherein the deformable ridges comprise a plurality of stepped surface portions.
References Cited (Backward Citations)
US868936A
Cited
US1159950A
Cited
US1997878A
Cited
US3420259A
Cited
US3511254A
Cited
US3471179A
Cited
US3534988A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |