Patent US3595107A successfully refreshed from Google Patents.
US3595107A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic pipe tapering device
Assignee: Individual
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Filing: 1969-11-05
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Granted: 1971-07-27
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Expires: 1989-11-05
Abstract
Abstract A rotary tool for concurrently forming a circumferential taper of desired angulation on an end portion of a length of plastic pipe and facing the end extremity of said portion to be normal to the longitudinal axis of the pipe.
Inventors
- 👤 Stephen Dackow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:56
CPC Classifications
B; B23; B23B; B23B5/00; B23B5/16; B23B5/167; B23B5/168; B26; B26F; B26F1/00; B26F1/0015; Y; Y10; Y10T; Y10T408/00; Y10T408/89; Y10T408/899; Y10T82/00; Y10T82/22
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
316 words
A device for use in concurrently forming a cylindrical tapered surface on aN end portion of a plastic pipe and facing said end portion to have a circumferential end extremity that is normal to the longitudinal axis of said pipe, said device including: a. an assembly that includes a rotatable elongate body that has a longitudinal slot that extends the length thereof, said body having a transverse diameter substantially greater than the external diameter of said pipe, and a longitudinally aligned cylindrical mandrel that extends forwardly from a first end of said body, said mandrel and body at their junction defining a circumferentially extending body shoulder, and said mandrel of such transverse cross section as to slidably and rotatably engage said pipe when said body is rotated relative to said pipe; b. a cutter bar removably positioned in said slot with a first end portion of said bar projecting forwardly from said body and spaced from said mandrel, said first end portion defining first and second cutting edges, said first cutting edge extending longitudinally on said first portion, said first cutting edge having the forward extremity thereof spaced outwardly from said mandrel a distance greater than the maximum wall thickness of pipe on which said device will be used, said first cutting edge tapering inwardly towards said mandrel at an angle at which it is desired to form said tapered surface. Said first cutting edge on the rearward end thereof developing into said second cutting edge; and c. first means for removably holding said cutter bar in said slot with said second cutting edge disposed slightly forwardly from said body shoulder, and said assembly and cutter bar when rotated concurrently relative to said end portion of said pipe and moved longitudinally relative thereto forming said tapered surface and end extremity by said first and second cutting edges being in pressure cutting contact with said end portion.
Claim 2
Independent Claim
316 words
A device for use in concurrently forming a cylindrical tapered surface on aN end portion of a plastic pipe and facing said end portion to have a circumferential end extremity that is normal to the longitudinal axis of said pipe, said device including: a. an assembly that includes a rotatable elongate body that has a longitudinal slot that extends the length thereof, said body having a transverse diameter substantially greater than the external diameter of said pipe, and a longitudinally aligned cylindrical mandrel that extends forwardly from a first end of said body, said mandrel and body at their junction defining a circumferentially extending body shoulder, and said mandrel of such transverse cross section as to slidably and rotatably engage said pipe when said body is rotated relative to said pipe; b. a cutter bar removably positioned in said slot with a first end portion of said bar projecting forwardly from said body and spaced from said mandrel, said first end portion defining first and second cutting edges, said first cutting edge extending longitudinally on said first portion, said first cutting edge having the forward extremity thereof spaced outwardly from said mandrel a distance greater than the maximum wall thickness of pipe on which said device will be used, said first cutting edge tapering inwardly towards said mandrel at an angle at which it is desired to form said tapered surface. Said first cutting edge on the rearward end thereof developing into said second cutting edge; and c. first means for removably holding said cutter bar in said slot with said second cutting edge disposed slightly forwardly from said body shoulder, and said assembly and cutter bar when rotated concurrently relative to said end portion of said pipe and moved longitudinally relative thereto forming said tapered surface and end extremity by said first and second cutting edges being in pressure cutting contact with said end portion.
Claim 3
Dependent Claim
61 words
A device as defined in claim 1 in which said first cutting edge is defined by first and second longitudinal intersecting surfaces on said first end portion, said first and second surfaces sustaining an angle of less than 90* therebetween, with said first surface radially aligned relative to said mandrel, and said second surface sloping upwardly and away from said mandrel.
Claim 4
Dependent Claim
64 words
A device as defined in claim 1 in which said slot and cutter bar are of rectangular transverse cross sections, and said first means are a plurality of screws that engage tapped bores formed in said body that communicate with said slot, with said screws when tightened in said bores pressure contacting said cutter bar and frictionally holding said cutter bar in said slot.
Claim 5
Dependent Claim
44 words
A device as defined in claim 1 which, in addition, includes: second engageable means on a second end of said body for concurrently rotating said body mandrel and cutter bar when said second engageable means are engaged by a power driven rotatable engaging member.
Claim 6
Dependent Claim
32 words
A device as defined in claim 4 in which said second means is a longitudinally centered recess of noncircular transverse cross section that extends into said body from said second end thereof.
Claim 7
Dependent Claim
62 words
A device as defined in claim 1 in which said cutter bar includes a second end portion identical to said first end portion, and said second end portion capable of being used to form said tapered surface and end extremity on said pipe when said cutter bar is so disposed in said slot that said second portion extends forwardly over said mandrel.
Claim 8
Dependent Claim
23 words
A device as defined in claim 1 in which at least a portion of said second edge is substantially normal to said mandrel.
Claim 9
Dependent Claim
34 words
A device as defined in claim 7 in which said first and second edges merge into a curved third cutting edge formed in said cutter bar and situated between said first and second edges.
Claim 10
Dependent Claim
38 words
A device as defined in claim 1 in which said body is formed with a knurled exterior surface that may be grasped manually to facilitate the rotation of said body, mandrel and cutter bar relative to said pipe.
Claim 11
Dependent Claim
49 words
A device as defined in claIm 1 which in addition includes: d. a cylindrical shell that frictionally engages the exterior surface of said body and extends over said first end portion of said cutter bar to prevent damage to said cutter bar by inadvertent contact with a hard object.
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) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |