Patent US3745801A successfully refreshed from Google Patents.
US3745801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple tube finning apparatus
Assignee: Carrier Corp
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Filing: 1972-03-02
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Granted: 1973-07-17
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Expires: 1992-03-02
Abstract
Abstract A tool for producing either a two or three lead integral fin structure on thin wall tubing is provided with two or more arbors, each having three groups of finning discs which are spaced from each other by a first and a second spacer. The second group of discs is located between the two spacers and includes a first disc adjacent the first spacer having a diameter of less than the diameter of the last disc on the first group. The second group of discs also includes a last disc adjacent the second spacer having a diameter greater than the diameter of the first disc on the third group adjacent the second spacer. In addition, the second group of discs includes another disc which is disposed intermediate the first and last discs and has a diameter which is substantially equal to that of the last disc on the first group and the first disc on the third group. At least two, and preferably three, arbors are employed and spaced during finning so that they begin separate fin leads.
Inventors
- 👤 A Kallfelz
- 👤 C Schmeling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:48
CPC Classifications
B; B21; B21H; B21H3/00; B21H3/12; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/20; B21C37/207
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
322 words
Apparatus for forming a multiple lead helical fin formation on tubing which comprises: A. a plurality of arbors positioned in circumferentially spaced relation around the axis along which a tube advances during a progressive finning operation, said arbors being positioned at an angle to said tube axis; B. a plurality of finning discs mounted on each of said arbors for rotation therewith, said finning discs being mounted in three spaced groups of discs which sequentially engage a tube advanced through the apparatus; C. a pair of spacers mounted on each of said arbors, the first of said spacers separating the first group of discs to engage a tube advanced through the apparatus from the second group of discs to engage the tube, and the second of said spacers separating the second group of discs from the third group of discs to engage the tube, said spacers having an axial length sufficient to separate said groups of discs a distance greater than the thickness of at least three of the discs to provide a period of time between contact of a portion of the tube surface by the discs of the successive groups; D. the second of said three groups of discs including: 1. a first disc adjacent said first spacer of a diameter less tHan the diameter of the largest disc of the first group of discs to engage the tube; 2. said second group of discs including a last disc having a diameter greater than the diameter of the first disc of the second group of discs and larger than the diameter of the first disc adjacent said second spacer of the third group of discs to engage the tube; and 3. said second group having another disc disposed intermediate said first disc and said second disc thereof, said other disc having a diameter intermediate the diameter of said first disc and said last disc of the second group of discs.
Claim 2
Dependent Claim
322 words
Apparatus for forming a multiple lead helical fin formation on tubing which comprises: A. a plurality of arbors positioned in circumferentially spaced relation around the axis along which a tube advances during a progressive finning operation, said arbors being positioned at an angle to said tube axis; B. a plurality of finning discs mounted on each of said arbors for rotation therewith, said finning discs being mounted in three spaced groups of discs which sequentially engage a tube advanced through the apparatus; C. a pair of spacers mounted on each of said arbors, the first of said spacers separating the first group of discs to engage a tube advanced through the apparatus from the second group of discs to engage the tube, and the second of said spacers separating the second group of discs from the third group of discs to engage the tube, said spacers having an axial length sufficient to separate said groups of discs a distance greater than the thickness of at least three of the discs to provide a period of time between contact of a portion of the tube surface by the discs of the successive groups; D. the second of said three groups of discs including: 1. a first disc adjacent said first spacer of a diameter less tHan the diameter of the largest disc of the first group of discs to engage the tube; 2. said second group of discs including a last disc having a diameter greater than the diameter of the first disc of the second group of discs and larger than the diameter of the first disc adjacent said second spacer of the third group of discs to engage the tube; and 3. said second group having another disc disposed intermediate said first disc and said second disc thereof, said other disc having a diameter intermediate the diameter of said first disc and said last disc of the second group of discs.
Claim 3
Dependent Claim
50 words
said second group of discs including a last disc having a diameter greater than the diameter of the first disc of the second group of discs and larger than the diameter of the first disc adjacent said second spacer of the third group of discs to engage the tube; and
Claim 4
Dependent Claim
50 words
said second group of discs including a last disc having a diameter greater than the diameter of the first disc of the second group of discs and larger than the diameter of the first disc adjacent said second spacer of the third group of discs to engage the tube; and
Claim 5
Dependent Claim
77 words
An apparatus for forming multiple lead helical fin formations as defined in claim 1, wherein the last disc on said first group of discs has a diameter substantially equal to the diameter of the first disc on the third group of discs, and wherein said other disc of said second group of discs has a diameter substantially equal to the diameter of the last disc of the first group and the first disc of the third group.
Claim 6
Dependent Claim
68 words
said second group of discs including another disc having a diameter greater than the diameter of said one disc of the second group and larger than the diameter of the smallest disc of the third group of discs to engage the tube, said other disc being arranged in said second group of discs to contact a tube advanced through the apparatus subsequent to contact by said one disc.
Claim 7
Dependent Claim
68 words
said second group of discs including another disc having a diameter greater than the diameter of said one disc of the second group and larger than the diameter of the smallest disc of the third group of discs to engage the tube, said other disc being arranged in said second group of discs to contact a tube advanced through the apparatus subsequent to contact by said one disc.
Claim 8
Dependent Claim
39 words
said second group having another disc disposed intermediate said first disc and said second disc thereof, said other disc having a diameter intermediate the diameter of said first disc and said last disc of the second group of discs.
Claim 9
Dependent Claim
39 words
said second group having another disc disposed intermediate said first disc and said second disc thereof, said other disc having a diameter intermediate the diameter of said first disc and said last disc of the second group of discs.
Claim 10
Dependent Claim
25 words
An apparatus for forming multiple lead helical fin formations as defined in claim 1, wherein each of said arbors consists of identical sets of discs.
Claim 11
Dependent Claim
34 words
An apparatus for forming multiple lead helical fin formations as defined in claim 1 wherein each of said three groups of discs on each arbor comprise at least three discs of progressively increasing diameter.
Claim 12
Dependent Claim
69 words
An apparatus for forming multiple lead helical fin formations as defined in claim 1 wherein at least two of said arbors are axially located with respect to each other so that the tube engaging portions of corresponding discs lie in a plane perpendicular with the axis of the tube so that at least two leads of said fin formation are simultaneously formed by the first disc on different arbors.
Claim 13
Dependent Claim
78 words
An apparatus for forming multiple lead helical fin formations as defined in claim 1 wherein said apparatus includes three of said arbors having identical sets of discs thereon, such arbors being axially located with respect to each other so that the tube engaging portions of corresponding discs lie in a plane perpendicular to the axis of the tube whereby three leads of said fin formation are simultaneously formed by the first disc on each of said three arbors.
Claim 14
Dependent Claim
202 words
Apparatus for forming a multiple lead helical fin formation on tubing which comprises: A. a plurality of arbors positioned in circumferentially spaced relation around the axis along which a tube advances during a progressive finning operation, said arbors being positioned at an angle to said tube axis; B. a plurality of finning discs mounted on each of said arbors for rotation therewith, said finning discs being mounted in three spaced groups of discs which sequentially engage a tube advanced through the apparatus; C. a pair of spacers mounted on each of said arbors, the first of said spacers separating the first group of discs to engage a tube advanced through the apparatus from the second group of discs to engage the tube, and the second of said spacers separating the second group of discs from the third group of discs to engage the tube, said spacers having an axial length sufficient to separate said groups of discs a distance greater than the thickness of at least three of the discs to provide a period of time between contact of a portion of the tube surface by the discs of the successive groups; D. the second of said three groups of discs including:
Claim 15
Dependent Claim
202 words
Apparatus for forming a multiple lead helical fin formation on tubing which comprises: A. a plurality of arbors positioned in circumferentially spaced relation around the axis along which a tube advances during a progressive finning operation, said arbors being positioned at an angle to said tube axis; B. a plurality of finning discs mounted on each of said arbors for rotation therewith, said finning discs being mounted in three spaced groups of discs which sequentially engage a tube advanced through the apparatus; C. a pair of spacers mounted on each of said arbors, the first of said spacers separating the first group of discs to engage a tube advanced through the apparatus from the second group of discs to engage the tube, and the second of said spacers separating the second group of discs from the third group of discs to engage the tube, said spacers having an axial length sufficient to separate said groups of discs a distance greater than the thickness of at least three of the discs to provide a period of time between contact of a portion of the tube surface by the discs of the successive groups; D. the second of said three groups of discs including:
Claim 16
Dependent Claim
66 words
An apparatus for forming multiple lead helical fin formAtions as defined in claim 7, wherein the largest disc on said first group of discs is disposed adjacent said first spacer, and wherein said smallest disc of said third group of discs is disposed adjacent said second spacer and has a diameter substantially equal to the diameter of the largest disc of said first group of discs.
Claim 17
Dependent Claim
34 words
An apparatus for forming multiple lead helical fin formations as defined in claim 7 wherein each of said three groups of discs on each arbor comprise at least three discs of progressively increasing diameter.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |