US3634941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Target system for laying sewer pipes
Assignee: Alignment Systems Inc
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Filing: 1969-03-05
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Granted: 1972-01-18
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Expires: 1989-03-05
Abstract
Abstract This disclosure relates to an adjustable target for use in aligning pipes with a laser beam or other similar collimated light beam which is projected axially with the pipe. The target has a base member, a level carried by the base member, an upright target carried by and vertically adjusted relative to the base. Extension means for the base member are also disclosed for extending the base laterally to permit the target to be employed in larger pipes.
Inventors
- 👤 Roger J Roodvoets
- 👤 James Stapert Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:21
CPC Classifications
G; G01; G01C; G01C15/00; G01C15/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
204 words
A target for use in aligning pipes with a collimated light beam which is projected longitudinally through the inside of the pipe, said target comprising: a target screen having an alignment indicating means for intersecting said collimated light beam; support means for supporting said screen within said pipe, said support means having two spaced support surfaces located on a plane for simultaneously resting on the inner surface of a pipe so as to support said screen, said spacing being less than the diameter of the pipe in which the target is to be used, said support means supporting said target in such a manner that said target screen is located above said spaced support surfaces on a plane transverse to a longitudinal axis of said pipe; a bubble level indicating means mounted on said support means between said surfaces such that said alignment indicating means of said target screen will be located on a predetermined vertical plane through said pipe when said level-indicating means is at a level position, whereby said target will always be aligned in a predetermined position within said pipe when said level indicating means is at a level position; and means for adjusting the spacing between said two support surfaces.
Claim 2
Dependent Claim
204 words
A target for use in aligning pipes with a collimated light beam which is projected longitudinally through the inside of the pipe, said target comprising: a target screen having an alignment indicating means for intersecting said collimated light beam; support means for supporting said screen within said pipe, said support means having two spaced support surfaces located on a plane for simultaneously resting on the inner surface of a pipe so as to support said screen, said spacing being less than the diameter of the pipe in which the target is to be used, said support means supporting said target in such a manner that said target screen is located above said spaced support surfaces on a plane transverse to a longitudinal axis of said pipe; a bubble level indicating means mounted on said support means between said surfaces such that said alignment indicating means of said target screen will be located on a predetermined vertical plane through said pipe when said level-indicating means is at a level position, whereby said target will always be aligned in a predetermined position within said pipe when said level indicating means is at a level position; and means for adjusting the spacing between said two support surfaces.
Claim 3
Dependent Claim
214 words
A target for use in aligning pipes with a collimated light beam which is projected longitudinally through the inside of the pipe, said target comprising: a target screen having an alignment indicating means for intersecting said collimated light beam; support means for supporting said screen within said pipe, said support means having two spaced support surfaces located on a plane for simultaneously resting on the inner surface of a pipe so as to support said screen, said spacing being less than the diameter of the pipe in which the target is to be used, said support means supporting said target in such a manner that said target screen is located above said spaced support surfaces on a plane transverse to a longitudinal axis of said pipe; a bubble level indicating means mounted on said support means between said surfaces such that said alignment indicating means of said target screen will be located on a predetermined vertical plane through said pipe when said level-indicating means is at a level position, whereby said target will always be aligned in a predetermined position within said pipe when said level indicating means is at a level position; and means for adjusting the target screen toward or away from the plane on which the said spaced surfaces are located.
Claim 4
Dependent Claim
214 words
A target for use in aligning pipes with a collimated light beam which is projected longitudinally through the inside of the pipe, said target comprising: a target screen having an alignment indicating means for intersecting said collimated light beam; support means for supporting said screen within said pipe, said support means having two spaced support surfaces located on a plane for simultaneously resting on the inner surface of a pipe so as to support said screen, said spacing being less than the diameter of the pipe in which the target is to be used, said support means supporting said target in such a manner that said target screen is located above said spaced support surfaces on a plane transverse to a longitudinal axis of said pipe; a bubble level indicating means mounted on said support means between said surfaces such that said alignment indicating means of said target screen will be located on a predetermined vertical plane through said pipe when said level-indicating means is at a level position, whereby said target will always be aligned in a predetermined position within said pipe when said level indicating means is at a level position; and means for adjusting the target screen toward or away from the plane on which the said spaced surfaces are located.
Claim 5
Dependent Claim
19 words
The target of claim 2, in which means is provided for adjusting the spacing between said two support surfaces.
References Cited (Backward Citations)
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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) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |