Patent US4426103A successfully refreshed from Google Patents.
US4426103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flange joint
Assignee: Individual
•
Filing: 1981-03-10
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Granted: 1984-01-17
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Expires: 2001-03-10
Abstract
Abstract The invention relates to a flange joint for use at relatively low pressures, whereby the pipe to be joined is provided with a peripheral shoulder against which a flange abuts, the flange being tightened by means of clamping bolts. For each clamping bolt is provided a separate flange piece which abuts against only a small portion of the peripheral shoulder.
Inventors
- 👤 Goran Sundholm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:48
CPC Classifications
F; F16; F16L; F16L23/00; F16L23/02; F16L23/024; F16L23/028; F16L23/0283
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
152 words
A flange joint for coupling the end of a pipe, provided with a peripheral shoulder around the pipe end, to a connecting piece against which the pipe end abuts, comprising a plurality of individual separate, flange pieces, each of which is tightened by an individual attachment means to the connecting piece, each flange piece having two cylindrical sections of different diameters, a larger diameter and a smaller diameter joined at an abutting shoulder, and an axial through bore extending axially through the two cylindrical sections with the abutting shoulder of each flange piece axially abutting against the peripheral shoulder of the pipe end, and said axial bore being positioned eccentrically with respect to the smaller diameter cylindrical section and the entire smaller diameter cylindrical section lying outside of the boundries of said peipheral shoulder and pipe end thereby allowing a variety of peripheral shoulder sizes to be connected to said connecting piece.
Claim 2
Dependent Claim
152 words
A flange joint for coupling the end of a pipe, provided with a peripheral shoulder around the pipe end, to a connecting piece against which the pipe end abuts, comprising a plurality of individual separate, flange pieces, each of which is tightened by an individual attachment means to the connecting piece, each flange piece having two cylindrical sections of different diameters, a larger diameter and a smaller diameter joined at an abutting shoulder, and an axial through bore extending axially through the two cylindrical sections with the abutting shoulder of each flange piece axially abutting against the peripheral shoulder of the pipe end, and said axial bore being positioned eccentrically with respect to the smaller diameter cylindrical section and the entire smaller diameter cylindrical section lying outside of the boundries of said peipheral shoulder and pipe end thereby allowing a variety of peripheral shoulder sizes to be connected to said connecting piece.
Claim 3
Dependent Claim
16 words
A flange joint as claimed in claim 1, wherein each attachment means is a clamp bolt.
Claim 4
Dependent Claim
37 words
A flange joint as claimed in claim 1, wherein both cylindrical sections of the flange piece are positioned concentric with respect to each other, and said axial bore is positioned eccentric with respect to both cylindrical sections.
Claim 5
Dependent Claim
26 words
A flange joint as claimed in claim 1, characterized in that the larger diameter cylindrical section of the flange piece and the through bore are concentric.
Claim 6
Dependent Claim
29 words
A flange joint as claimed in claim 1, further comprising a holding ring arranged around the smaller diameter cylindrical sections of the flange pieces for preventing radial movement outwards.
Claim 7
Dependent Claim
34 words
A flange joint as claimed in claim 2, adapted for high pressures, further comprising a separate support plate, formed as one integral piece, arranged between the clamp bolts and the individual, separate flange pieces.
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) | 1987-01-16 | 1987-07-18 | 1988-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-16 | 1991-07-18 | 1992-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-16 | 1995-07-18 | 1996-01-17 | $7700.00 | Window Closed / Lapsed |