Patent US4580345A successfully refreshed from Google Patents.
US4580345A
Expired / Lapsed
US
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Laser pipe layout device
Assignee: Contech Engineered Solutions LLC
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Filing: 1984-08-24
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Granted: 1986-04-08
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Expires: 2004-08-24
Abstract
Abstract A method and apparatus for scribing a severance line around the circumference of a pipe employing a protractor with a rotative arm and alignment guide pin; and a laser beam producing a vertical line beam. The protractor is mounted on the pipe to be cut so that the protractor is parallel with respect to the longitudinal center line of the length of the pipe. Once the protractor is parallel and set to the desired angle, the laser beam is energized to project a line upon the pipe which is in alignment with the alignment guide pins. The projected line is chalked on the pipe and the pipe is cut in any conventional manner.
Inventors
- 👤 Roger F. Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:39
CPC Classifications
B; B25; B25H; B25H7/00; B25H7/005; Y; Y10; Y10S; Y10S33/00; Y10S33/21
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
111 words
A method of cutting an elongated structrual member comprising: mounting a generally planar protractor having a center reference means positioned perpendicular to said planar protractor upon said structural member wherein a longitudinal line of the length of the structural member is parallel with said planar protractor, positioning an alignment guide means upon the protractor at the desired angle to which said structural member is to be cut; energizing a vertical beam laser; positioning said laser until the laser beam is in alignment with said alignment means mounted upon said protractor and said center reference means; marking the structural member along said laser beam; and cutting said structural member along said marking.
Claim 2
Independent Claim
111 words
A method of cutting an elongated structrual member comprising: mounting a generally planar protractor having a center reference means positioned perpendicular to said planar protractor upon said structural member wherein a longitudinal line of the length of the structural member is parallel with said planar protractor, positioning an alignment guide means upon the protractor at the desired angle to which said structural member is to be cut; energizing a vertical beam laser; positioning said laser until the laser beam is in alignment with said alignment means mounted upon said protractor and said center reference means; marking the structural member along said laser beam; and cutting said structural member along said marking.
Claim 3
Dependent Claim
21 words
The method of claim 1, wherein said alignment guide means includes an arm which rotates about the center of the protractor.
Claim 4
Dependent Claim
21 words
The method of claim 2, wherein said arm includes at least one alignment guide pin which is normal to said arm.
Claim 5
Dependent Claim
31 words
The method of claim 2, wherein the step of positioning an alignment guide means upon said protractor includes means to securely fasten said arm to said protractor at the desired angle.
Claim 6
Dependent Claim
25 words
The method of claim 4, wherein said means to securely fasten the arm includes a slide bracket mounted on said arm and a thumb screw.
Claim 7
Dependent Claim
29 words
The method of claim 2, wherein the step of positioning an alignment guide means upon said protractor includes means to securely fasten said arm to said center reference means.
Claim 8
Dependent Claim
13 words
The method of claim 1, wherein said protractor includes a level indicating device.
Claim 9
Dependent Claim
31 words
The method of claim 1, wherein said protractor includes a base portion comprising a pair of diverging legs integrally attached to a generally vertical section, which is secured to the protractor.
Claim 10
Dependent Claim
15 words
The method of of claim 8, wherein said protractor has a pair of base portions.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-07 | 1989-10-07 | 1990-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-07 | 1993-10-07 | 1994-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-07 | 1997-10-07 | 1998-04-08 | $7700.00 | Window Closed / Lapsed |