US3577889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for slitting and trimming pipe covering
Assignee: Keene Corp
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Filing: 1969-06-18
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Granted: 1971-05-11
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Expires: 1989-06-18
Abstract
Abstract An apparatus for finishing tubular members, conveyor means for moving tubular members in spaced-apart relation along a predetermined path, and along said path a first cutting station including a first saw blade for cutting one wall of the tubular member for its entire length, a second cutting station including a second cutting blade for partially slitting the inner wall of said tubular member along a line diametrically opposed to said first cut to provide a hinge, and a trimming station including a pair of spaced cutting elements to trim opposite axial ends of the tubular members upon relative movement of the tubular member and cutting elements.
Inventors
- 👤 Herluf N Eriksen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:48
CPC Classifications
B; B26; B26D; B26D3/00; B26D3/001; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/4987; Y10T29/49876; Y10T29/53; Y10T29/53657; Y10T83/00; Y10T83/02; Y10T83/0207; Y10T83/0215; Y10T83/04; Y10T83/0596; Y10T83/707; Y10T83/7083
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
106 words
In apparatus for finishing tubular members, conveyor means for moving tubular members in spaced-apart relation along a predetermined path, and along said path a first cutting station including a first saw blade for cutting one wall of the tubular member for its entire length, a second cutting station including a second cutting blade for partially slitting the inner wall of said tubular member along a line diametrically opposed to said first cut to provide a hinge, and a trimming station including a pair of spaced cutting elements to trim opposite axial ends of the tubular members upon relative movement of the tubular member and cutting elements.
Claim 2
Dependent Claim
106 words
In apparatus for finishing tubular members, conveyor means for moving tubular members in spaced-apart relation along a predetermined path, and along said path a first cutting station including a first saw blade for cutting one wall of the tubular member for its entire length, a second cutting station including a second cutting blade for partially slitting the inner wall of said tubular member along a line diametrically opposed to said first cut to provide a hinge, and a trimming station including a pair of spaced cutting elements to trim opposite axial ends of the tubular members upon relative movement of the tubular member and cutting elements.
Claim 3
Dependent Claim
82 words
In apparatus as claimed in claim 1 including a reciprocating carriage at said trimming station adapted for movement between a first limit position to receive tubular members from said second cutting station and a second discharge limit position and wherein said cutting elements are endless band saws mounted in a stationary position disposed so that upon actuation of said carriage from said first to said second limit position, the opposite axial ends of said tubular member carried by said carriage are trimmed.
Claim 4
Dependent Claim
55 words
In apparatus as claimed in claim 2 including a clamp assembly mounted on said carriage having a pivotally mounted clamping arm actuatable between a lowered position for securing the tubular member in place on said carriage during said trimming operation and a raised position to permit discharge of said tubular member after the trimming operation.
Claim 5
Dependent Claim
30 words
In apparatus as claimed in claim 3 including a discharge ram mounted on said carriage for discharging finished tubular members from the carriage as it approaches said second limit position.
Claim 6
Dependent Claim
41 words
In apparatus as claimed in claim 1 including an accumulator station at one end of said path defined by a bin having downwardly converging sidewalls to permit discharge of only one tubular member at a time for movement along said path.
Claim 7
Dependent Claim
33 words
In apparatus as claimed in claim 5 wherein said path is defined by a trackway having spaced sidewalls which are selectively adjustable widthwise whereby the apparatus may accommodate tubular members of different sizes.
Claim 8
Dependent Claim
46 words
In apparatus as claimed in claim 1 wherein said second cutting blade is a disclike cutting blade and means is provided for selectively varying the position of the blade relative to the tubular member so that the depth of cut for said hinge may be controlled.
Claim 9
Dependent Claim
72 words
In apparatus as claimed in claim 7 wherein said mounting means for said second cutting blade includes a shaft extending transversely of said path, a hub member keyed to the shaft and a collar carried by the blade rotatably supported on the hub member, said shaft being exposed eccentrically relative to the hub member whereby upon rotation of the shaft the height of the cutting edge of the blade might be varied.
Claim 10
Independent Claim
74 words
A method for finishing tubular members consisting of the steps of moving at least one tubular member along a predetermined path, forming a complete cut along a longitudinal line in one wall of the tubular member for its entire length, forming a partial slit in the inner wall of the tubular member along a line diametrically opposed to the longitudinal cut to provide a hinge and trimming opposite axial ends of the tubular member.
Claim 11
Independent Claim
74 words
A method for finishing tubular members consisting of the steps of moving at least one tubular member along a predetermined path, forming a complete cut along a longitudinal line in one wall of the tubular member for its entire length, forming a partial slit in the inner wall of the tubular member along a line diametrically opposed to the longitudinal cut to provide a hinge and trimming opposite axial ends of the tubular member.
References Cited (Backward Citations)
US2756172A
Cited
US3499210A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |