US4015324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for separating flange pipes
Assignee: Individual
•
Filing: 1976-05-21
•
Granted: 1977-04-05
•
Expires: 1996-05-21
Abstract
Abstract Pipe flanges of a flanged-pipe joint are separated for replacement of seals or any other purpose by fitting an expandable plug into a bore of one of the flanges, inserting a plate in the gap between the flanges and threading a screw into the expandable plug to cause the latter to grip the wall of the bore while the screw bears against the plate to push the flanges apart. The expandable plug preferably comprises an internal wedging core which displaces outwardly the segments from which the outer member of the plug is formed, the segment being externally toothed to grip the wall.
Inventors
- 👤 Arnold Lutter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:44
CPC Classifications
B; B25; B25B; B25B27/00; B25B27/14; B25B27/16; F; F16; F16L; F16L23/00; F16L23/003; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53683
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
116 words
A device for separating the flanges of a pipe joint wherein a pair of flanges are spacedly juxtaposed and at least one of the flanges is provided with a bore, said device comprising a spreadable sleeve receivable in said bore, an internally threaded core member received in said sleeve and axially displaceable relative thereto for spreading said sleeve against the wall of said bore to anchor said sleeve in said bore, a plate receivable between said flanges, and a screw threaded into said core member and adapted to bear against said plate for pressing said plate against the other of said flanges while simultaneously displacing said sleeve and said core relatively, thereby spreading said flanges apart.
Claim 2
Independent Claim
116 words
A device for separating the flanges of a pipe joint wherein a pair of flanges are spacedly juxtaposed and at least one of the flanges is provided with a bore, said device comprising a spreadable sleeve receivable in said bore, an internally threaded core member received in said sleeve and axially displaceable relative thereto for spreading said sleeve against the wall of said bore to anchor said sleeve in said bore, a plate receivable between said flanges, and a screw threaded into said core member and adapted to bear against said plate for pressing said plate against the other of said flanges while simultaneously displacing said sleeve and said core relatively, thereby spreading said flanges apart.
Claim 3
Dependent Claim
24 words
The device defined in claim 1 wherein said sleeve is formed along its exterior with roughening formations engageable with said wall of said bore.
Claim 4
Dependent Claim
39 words
The device defined in claim 1 wherein said sleeve and said core member are formed with complementary wedging surfaces spreading said sleeve against said wall of said bore upon relative axial displacement of said core member and said sleeve.
Claim 5
Dependent Claim
16 words
The device defined in claim 3, further comprising means movably coupling said screw to said plate.
Claim 6
Dependent Claim
26 words
The device defined in claim 4 wherein said sleeve is formed with teeth of sawtooth profile along its exterior engageable with said wall of said bore.
Claim 7
Dependent Claim
23 words
The device defined in claim 5 wherein said sleeve is formed from a plurality of segments, and soring means beasing said segments inwardly.
Claim 8
Dependent Claim
59 words
The device defined in claim 6 wherein said bolt has a rounded tip adapted to bear against said plate and a prismatic head, said means movably connecting said plate to said screw including a ring rotatable on said screw and a flexible element connecting said ring to said plate, said plate having a handle connected to said flexible element.
Claim 9
Dependent Claim
58 words
The device defined in claim 7 wherein said core member has a frustoconical outer surface bearing upon said segments, said sleeve having an internal frustoconical surface resting against said frustoconical surface of said core member, said core member projecting axially from said sleeve at one end thereof and being formed at said one end with a circumferential flange.
Claim 10
Dependent Claim
27 words
The device defined in claim 9 wherein said spring means includes an externally open groove formed in said sleeve and a spring ring received in said groove.
Claim 11
Dependent Claim
15 words
The device defined in claim 9 wherein four such segments are provided on said sleeve.
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) | 1980-04-04 | 1980-10-04 | 1981-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-04 | 1984-10-04 | 1985-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-04 | 1988-10-04 | 1989-04-05 | $7700.00 | Window Closed / Lapsed |