Patent US2615290A successfully refreshed from Google Patents.
Patent US3695647A successfully refreshed from Google Patents.
US3695647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe coupling
Assignee: Crane Instrumentation and Sampling Inc
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Filing: 1970-07-16
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Granted: 1972-10-03
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Expires: 1990-07-16
Abstract
Abstract A compression coupling for a pipe or tube having improved uncoupling and recoupling capabilities. The coupling is of the type wherein a tube is received into a body portion and is attached thereto by the action of one or more ring-like ferrules which are wedged between the tube and the body by a coupling nut. The improvement is principally in the shape of the tube receiving bore in the body which is made with angularly positioned tube sizing and tube braking surfaces. This shaping of the bore causes the tube when initially attached to and seated on the body to have a selective reshaping which facilitates tube removal and reinsertion regardless of dimensional variations in the body and tube sizes.
Inventors
- 👤 Joseph A Pugliese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:50
CPC Classifications
F; F16; F16L; F16L19/00; F16L19/08; F16L19/10; F16L19/103
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
272 words
A compression tube coupling in combination with a tube, the coupling including a body having a bore containing the tube which body includes in succession from the outer end a flared outer end portion, a cylindrical portion, a conical surface having an innermost diameter less than the outer diameter of a tube of the smallest tolerance and an outer diameter greater than the outer diameter of a tube of the largest tolerance of a given nominal diameter, and a tube end engagement shoulder, the inner end of said cylindrical portion connecting with the conical surface, said conical surface having its inner end positioned at said shoulder, said shoulder having a generally V-shaped axially outwardly facing surface in axial cross section, the radially outward leg of the V having a rounded outer edge in cross-section and forming a tube braking surface engaging the outer edge of the tube and braking the tube motion toward its assembled position, the radially inward leg of the V forming a relatively straight butt seal surface engaging the inner edge of the tube and forming a seal with the tube and simultaneously causing a controlled bulging of the tube end portion, ferrule means engaging the tube and wedged between the outer flared portion of the bore and the tube, a nut engaging the ferrule means for forcing the end of the tube against said shoulder, and the tube having a portion adjacent to its end in engagement with the conical surface of the bore and having its end permanently deformed and in sealing engagement with said rounded outer edge and with said butt seal surface of said shoulder.
Claim 2
Dependent Claim
272 words
A compression tube coupling in combination with a tube, the coupling including a body having a bore containing the tube which body includes in succession from the outer end a flared outer end portion, a cylindrical portion, a conical surface having an innermost diameter less than the outer diameter of a tube of the smallest tolerance and an outer diameter greater than the outer diameter of a tube of the largest tolerance of a given nominal diameter, and a tube end engagement shoulder, the inner end of said cylindrical portion connecting with the conical surface, said conical surface having its inner end positioned at said shoulder, said shoulder having a generally V-shaped axially outwardly facing surface in axial cross section, the radially outward leg of the V having a rounded outer edge in cross-section and forming a tube braking surface engaging the outer edge of the tube and braking the tube motion toward its assembled position, the radially inward leg of the V forming a relatively straight butt seal surface engaging the inner edge of the tube and forming a seal with the tube and simultaneously causing a controlled bulging of the tube end portion, ferrule means engaging the tube and wedged between the outer flared portion of the bore and the tube, a nut engaging the ferrule means for forcing the end of the tube against said shoulder, and the tube having a portion adjacent to its end in engagement with the conical surface of the bore and having its end permanently deformed and in sealing engagement with said rounded outer edge and with said butt seal surface of said shoulder.
Claim 3
Dependent Claim
41 words
The coupling as claimed in claim 1 in which said ferrule has an outwardly extending shoulder with a radially inwardly and axially rearwardly sloping front surface for engaging the body end to limit body expansion when the coupling is made up.
Claim 4
Dependent Claim
37 words
The coupling as claimed in claim 1 in which said braking surface has an angle of about 10* to 20* With the tube radius and said conical surface has a half-cone angle of between 10* and 20*.
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) | 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 |