US3810402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube severing device
Assignee: Carrier Corp
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Filing: 1972-11-09
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Granted: 1974-05-14
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Expires: 1992-11-09
Abstract
Abstract A cylindrical housing is dimensioned for insertion in a heat exchanger tube. The housing is formed with a bore extending therethrough and located eccentrically relative to the axis of the housing. A shaft is journaled in the bore and is provided at its inner end with a tube penetrating rib arranged eccentrically with the axis of the shaft. The eccentricity of the shaft penetrating rib relative to the axis of the shaft is comparable to the eccentricity of the housing relative to the axis of the shaft, whereby the penetrating shaft rib may be positioned in registration with the inner end of the housing to permit the same to be inserted in the tube. Driving means is operable to effect rotation of the shaft moving the penetrating rib thereon into engagement with the inner surface of the tube. This rotation on the shaft extends through a part of a revolution and thereupon, the driving means effects rotation of the shaft and the housing in unison effecting complete severance of the tube.
Inventors
- 👤 C Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:03
CPC Classifications
B; B23; B23D; B23D21/00; B23D21/14; Y; Y10; Y10T; Y10T82/00; Y10T82/16; Y10T82/16426; Y10T82/16639; Y10T82/25; Y10T82/2522
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
227 words
An internal tube severing device comprising an elongated housing member circular in cross section and having a diameter slightly less than the internal diameter of the tube, said housing member being formed with a through axial bore located eccentrically relative to the axis of the housing, a shaft journaled in said bore and provided at its inner end with a radially outwardly extending tube penetrating rib portion, said rib portion being disposed eccentrically to the axis of said shaft and abutting the inner end of said housing, the eccentricity of said rib portion, relative to the axis of said shaft, being comparable to the eccentricity of the housing relative to the axis of said shaft, whereby said rib portion may be positioned in registration with said housing member for insertion of the inner end portion of same into the tube, the outer end portion of said housing extending outwardly from the end of said tube and the outer end portion of said shaft extending outwardly from the outer end portion of said housing, and driving means mounted on the outer ends of said housing and shaft and being operably connected to both the housing and the shaft to automatically rotate only said shaft initially through part of a revolution and to subsequently effect rotation of said housing and shaft in unison through the remainder of the revolution.
Claim 2
Dependent Claim
227 words
An internal tube severing device comprising an elongated housing member circular in cross section and having a diameter slightly less than the internal diameter of the tube, said housing member being formed with a through axial bore located eccentrically relative to the axis of the housing, a shaft journaled in said bore and provided at its inner end with a radially outwardly extending tube penetrating rib portion, said rib portion being disposed eccentrically to the axis of said shaft and abutting the inner end of said housing, the eccentricity of said rib portion, relative to the axis of said shaft, being comparable to the eccentricity of the housing relative to the axis of said shaft, whereby said rib portion may be positioned in registration with said housing member for insertion of the inner end portion of same into the tube, the outer end portion of said housing extending outwardly from the end of said tube and the outer end portion of said shaft extending outwardly from the outer end portion of said housing, and driving means mounted on the outer ends of said housing and shaft and being operably connected to both the housing and the shaft to automatically rotate only said shaft initially through part of a revolution and to subsequently effect rotation of said housing and shaft in unison through the remainder of the revolution.
Claim 3
Dependent Claim
26 words
A tube severing device as set forth in claim 1 wherein said driving means effects initial rotation of said shaft through an arc of substantially 180*.
Claim 4
Dependent Claim
41 words
A tube severing device as set forth in claim 1 wherein the inner end of said housing is provided on the periphery thereof in the area of maximum eccentricity relative to the axis of said shaft with a tube penetrating rib.
Claim 5
Dependent Claim
30 words
A tube severing device as set forth in claim 1 wherein said penetrating rib portion of said shaft is of arcuate form extending through an arc of substantially 90* .
Claim 6
Dependent Claim
30 words
An internal tube severing device as set forth in claim 3 wherein saId tube penetrating rib on said housing is of arcuate form extending through an arc of substantially 90*.
Claim 7
Dependent Claim
57 words
An internal tube severing device as set forth in claim 1 wherein said driving means includes a driven member fixed to the outer end of said housing and a driving member fixed to the outer end of said shaft and motion transmitting means connecting said members upon rotation of said driving member through an arc of 180*.
Claim 8
Dependent Claim
50 words
A tube severing device as set forth in claim 1 wherein the inner end portion of said shaft is of cylindrical formation arranged eccentric to the axis of said shaft and said penetrating rib is affixed to the periphery of said cylindrical portion in the area of maximum eccentricity thereof.
Claim 9
Dependent Claim
186 words
An internal tube severing apparatus including a pair of cutting ribs, an elongated housing capable of being inserted into the tube for eccentrically supporting one of said cutting ribs substantially perpendicular to the axial centerline of said housing, said ribs extending beyond the outer periphery of said housing a distance at least equal to the wall thickness of said tube, an elongated shaft eccentrically mounted within said housing and passing beyond the tube insertable end thereof, said shaft eccentrically supporting said second cutting rib in parallel alignment with said first cutting rib, the eccentricity of said second rib relative to the axis of said shaft being comparable to the eccentricity of the housing relative to the axis of said shaft whereby said second rib is registrable with the outer periphery of said first rib for insertion therewith into said tube, means operable to initially rotate only said shaft through a part of a single revolution and to subsequently effect rotation of said housing and said shaft in unison through the remainder of said revolution whereby both cutting discs are passed through the wall of said tube.
Claim 10
Dependent Claim
186 words
An internal tube severing apparatus including a pair of cutting ribs, an elongated housing capable of being inserted into the tube for eccentrically supporting one of said cutting ribs substantially perpendicular to the axial centerline of said housing, said ribs extending beyond the outer periphery of said housing a distance at least equal to the wall thickness of said tube, an elongated shaft eccentrically mounted within said housing and passing beyond the tube insertable end thereof, said shaft eccentrically supporting said second cutting rib in parallel alignment with said first cutting rib, the eccentricity of said second rib relative to the axis of said shaft being comparable to the eccentricity of the housing relative to the axis of said shaft whereby said second rib is registrable with the outer periphery of said first rib for insertion therewith into said tube, means operable to initially rotate only said shaft through a part of a single revolution and to subsequently effect rotation of said housing and said shaft in unison through the remainder of said revolution whereby both cutting discs are passed through the wall of said tube.
Claim 11
Dependent Claim
40 words
The apparatus of claim 8 wherein said shaft is initially rotated through 180* of one revolution prior to the rotation of said housing whereby the cutting ribs act substantially in opposition to each other as they penetrate the tube wall.
Claim 12
Dependent Claim
42 words
The apparatus of claim 9 wherein the terminal end of said shaft passing beyond said housing is provided with a bearing surface adapted to contact the inner wall of said tube for further supporting the cutting ribs as they are rotated therein.
Claim 13
Dependent Claim
23 words
The apparatus of claim 8 wherein said cutting ribs are disc shaped and are supported in face-to-face sliding parallel abutment with each other.
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) | 1977-05-13 | 1977-11-12 | 1978-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-13 | 1981-11-12 | 1982-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-13 | 1985-11-12 | 1986-05-14 | $7700.00 | Window Closed / Lapsed |