US3601852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe flaring tool
Assignee: Reed Manufacturing Co
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Filing: 1969-05-27
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Granted: 1971-08-31
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Expires: 1989-05-27
Abstract
Abstract A pipe flaring tool for thermoplastic pipe such as polybutylene, polyethylene, polyvinyl, etc., used for domestic water service in which the pipe to be flared is solidly gripped against an internal mandrel while the flaring is accomplished by a spinning tool rotated about the axis of the pipe. The flare is effected by local deformation accompanied by heating by internal and external friction in the plastic.
Inventors
- 👤 Bendt G Bjalme
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:52
CPC Classifications
B; B29; B29C; B29C57/00; B29C65/00; B29C65/56; B29C65/567; B29C65/568; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/118; B29C66/12; B29C66/128; B29C66/1282; B29C66/1284; B29C66/1286; B29C66/50; B29C66/51; B29C66/52; B29C66/522; B29C66/5229; B29C66/53; B29C66/534; B29C66/5344; B29C66/80; B29C66/82; B29C66/822; B29C66/8221; B29C66/828; B29C66/8286; B29C66/83; B29C66/832; B29C66/8324; B29C66/83241; B29C66/81; B29C66/814; B29C66/8141; B29C66/81411; B29C66/81421; B29C66/81423
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
246 words
A pipe flaring tool for thermoplastic pipe comprising arbor means adapted to be received in the bore of a pipe adjacent the pipe end to be flared, means engaging the external surface of the pipe opposite the arbor means and cooperating with the arbor means to clamp the intervening pipe wall therebetween while leaving the pipe end to be flared free, a spinning tool, means for supporting the spinning tool on said arbor for rotation relative to the arbor about the axis of the pipe and for movement relative to the arbor along said axis, said spinning tool having a surface transverse to said axis, the projection of said surface of the tool on a plane including the axis of the pipe extending radially outside the bore of the pipe and the projection of said surface of the tool on a plane at right angles to the axis of the pipe having a circumferential extent which is a minor fraction of the circumference of the bore of the pipe, said surface locally engaging the inner surface of the wall of said pipe end and deflecting said locally engaged portion axially inward and radially outward of the axis of the pipe relative to the portion of said pipe end adjacent said locally engaged portion and progressively forming the wall of said pipe end into a continuous flare by relative rotation and axial movement of the spinning tool about the axis of the pipe and toward the arbor.
Claim 2
Dependent Claim
246 words
A pipe flaring tool for thermoplastic pipe comprising arbor means adapted to be received in the bore of a pipe adjacent the pipe end to be flared, means engaging the external surface of the pipe opposite the arbor means and cooperating with the arbor means to clamp the intervening pipe wall therebetween while leaving the pipe end to be flared free, a spinning tool, means for supporting the spinning tool on said arbor for rotation relative to the arbor about the axis of the pipe and for movement relative to the arbor along said axis, said spinning tool having a surface transverse to said axis, the projection of said surface of the tool on a plane including the axis of the pipe extending radially outside the bore of the pipe and the projection of said surface of the tool on a plane at right angles to the axis of the pipe having a circumferential extent which is a minor fraction of the circumference of the bore of the pipe, said surface locally engaging the inner surface of the wall of said pipe end and deflecting said locally engaged portion axially inward and radially outward of the axis of the pipe relative to the portion of said pipe end adjacent said locally engaged portion and progressively forming the wall of said pipe end into a continuous flare by relative rotation and axial movement of the spinning tool about the axis of the pipe and toward the arbor.
Claim 3
Dependent Claim
28 words
The tool of claim 1 in which the means for supporting the spinning tool comprises a screw-threaded projection on the arbor on which the spinning tool is screwed.
Claim 4
Dependent Claim
50 words
The tool of claim 1 in which said surface of the spinning tool is inclined at an acute angle to the axis of the pipe adjacent the bore of the pipe and at an obtuse angle to the axis of the pipe radially outward from the bore of the pipe.
Claim 5
Dependent Claim
24 words
The tool of claim 1 in which said surface of the spinning tool is concave in a plane including the axis of the pipe.
Claim 6
Dependent Claim
47 words
The tool of claim 1 in which said surface of the spinning tool is inclined at an acute angle to the axis of the pipe adjacent the bore of the pipe and in which the angle of inclination increases radially outward from the bore of the pipe.
Claim 7
Dependent Claim
19 words
The tool of claim 1 in which said surface of the spinning tool is convex in circumferential cross section.
Claim 8
Dependent Claim
34 words
The tool of claim in which said said surface of the spinning tool is convex in circumferential cross section and concave in radial cross section in a plane including the axis of the pipe.
Claim 9
Dependent Claim
201 words
Apparatus for flaring flexible thermoplastic pipe comprising, means for holding the wall of the pipe adjacent the end of the pipe to be flared while leaving said pipe end free, means for locally engaging a portion of the inner surface of the wall of said pipe end while leaving the portions of said pipe end adjacent said locally engaged portion free with a tool having surfaces transverse to the axis of the pipe, the projection of said surfaces on a plane at right angles to the axis of the pipe having a circumferential extent which is a minor fraction of the circumference of the bore of the pipe, said surfaces exerting an axial force from said tool to deflect the locally engaged portion of said pipe end axially inward and radially outward of the axis of the pipe relative to portions of said pipe end adjacent said locally engaged portion, and means for effecting relative rotation of the tool with respect to said pipe end about the axis of the pipe and for effecting relative axial movement of the tool with respect to said pipe end along the axis of the pipe to form said pipe end into a continuous flare.
Claim 10
Dependent Claim
201 words
Apparatus for flaring flexible thermoplastic pipe comprising, means for holding the wall of the pipe adjacent the end of the pipe to be flared while leaving said pipe end free, means for locally engaging a portion of the inner surface of the wall of said pipe end while leaving the portions of said pipe end adjacent said locally engaged portion free with a tool having surfaces transverse to the axis of the pipe, the projection of said surfaces on a plane at right angles to the axis of the pipe having a circumferential extent which is a minor fraction of the circumference of the bore of the pipe, said surfaces exerting an axial force from said tool to deflect the locally engaged portion of said pipe end axially inward and radially outward of the axis of the pipe relative to portions of said pipe end adjacent said locally engaged portion, and means for effecting relative rotation of the tool with respect to said pipe end about the axis of the pipe and for effecting relative axial movement of the tool with respect to said pipe end along the axis of the pipe to form said pipe end into a continuous flare.
Claim 11
Dependent Claim
46 words
The apparatus of claim 8 in which the angle between said surface of the tool and the axis of the pipe in an acute angle adjacent the bore of the pipe end is greater than an acute angle radially outward from the bore of the pipe.
Claim 12
Dependent Claim
25 words
The apparatus of claim 8 in which the inner and outer surfaces of the pipe adjacent the pipe end to be flaRed are rigidly held.
Claim 13
Dependent Claim
34 words
The apparatus of claim 8 in which said surface of the spinning tool extends radially outward from the axis of the pipe a distance greater than the radius of the bore of the pipe.
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) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |