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US3632270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of concrete pipes
Assignee: Individual
•
Filing: 1969-03-14
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Granted: 1972-01-04
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Expires: 1989-03-14
Abstract
Abstract An apparatus for the manufacture of concrete pipe, in which injurious tangential force exerted between the compacting rollers and the pipe is substantially overcome. The means for overcoming or modifying the tangential force includes motor means operatively connected to drive the compacting rollers and motor means operatively and controllably connected to drive the roller head.
Inventors
- 👤 Clifford Aubrey Baker
- 👤 Morris Charles Kiefel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:14
CPC Classifications
B; B28; B28B; B28B21/00; B28B21/02; B28B21/10; B28B21/22; B28B21/24; B28B21/242; B28B21/247
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
189 words
Apparatus for the manufacture of a reinforced concrete pipe, comprising a nonrotatable mould for receiving a concrete mixture and a reinforcement cage to form the pipe, means for compacting the concrete mixture as the pipe is formed in the mould and comprising a rotatable head supported for rotation in the mould on a center located on the axis of the mould, a first motor means for rotating the rotatable head, means for reciprocating the rotatable head longitudinally of the mould, a plurality of rotatable rollers mounted on the rotatable head for rotation on axes parallel to the axis of the mould as the rotaTable head rotates to engage the inner surface of the pipe and compact the concrete mixture as the pipe is formed, a second motor means operatively connected to the rotatable rollers for rotating the rollers, and means for controlling the power output of one of the motors so that it will develop a rotary force counter to and substantially equal to the retarding tangential force exerted between the rollers and the pipe as the pipe is being formed in the mould and compacted by the rollers.
Claim 2
Dependent Claim
189 words
Apparatus for the manufacture of a reinforced concrete pipe, comprising a nonrotatable mould for receiving a concrete mixture and a reinforcement cage to form the pipe, means for compacting the concrete mixture as the pipe is formed in the mould and comprising a rotatable head supported for rotation in the mould on a center located on the axis of the mould, a first motor means for rotating the rotatable head, means for reciprocating the rotatable head longitudinally of the mould, a plurality of rotatable rollers mounted on the rotatable head for rotation on axes parallel to the axis of the mould as the rotaTable head rotates to engage the inner surface of the pipe and compact the concrete mixture as the pipe is formed, a second motor means operatively connected to the rotatable rollers for rotating the rollers, and means for controlling the power output of one of the motors so that it will develop a rotary force counter to and substantially equal to the retarding tangential force exerted between the rollers and the pipe as the pipe is being formed in the mould and compacted by the rollers.
Claim 3
Dependent Claim
17 words
Apparatus according to claim 1, wherein the control means is connected to control the first motor means.
Claim 4
Dependent Claim
17 words
Apparatus according to claim 1, wherein the control means is connected to control the second motor means.
Claim 5
Dependent Claim
139 words
Apparatus for the manufacture of a reinforced concrete pipe comprising a nonrotatable vertically mounted mould for receiving a concrete mixture and a reinforcement cage, a rotatable head supported for rotation on a center located on the axis of the mould, means for moving the rotatable head axially within the mould, a plurality of rotatable rollers mounted on the rotatable head for rotation on axes parallel to the axis of the mould to engage the inner surface of the pipe and compact the concrete mixture as the pipe is formed, driving means for rotating the rollers at a speed such that a predetermined resultant tangential force will be exerted between the rollers and the pipe as the pipe is formed in the mould and compacted by the rollers and means for operatively connecting the driving means to the rotatable rollers.
Claim 6
Dependent Claim
139 words
Apparatus for the manufacture of a reinforced concrete pipe comprising a nonrotatable vertically mounted mould for receiving a concrete mixture and a reinforcement cage, a rotatable head supported for rotation on a center located on the axis of the mould, means for moving the rotatable head axially within the mould, a plurality of rotatable rollers mounted on the rotatable head for rotation on axes parallel to the axis of the mould to engage the inner surface of the pipe and compact the concrete mixture as the pipe is formed, driving means for rotating the rollers at a speed such that a predetermined resultant tangential force will be exerted between the rollers and the pipe as the pipe is formed in the mould and compacted by the rollers and means for operatively connecting the driving means to the rotatable rollers.
Claim 7
Dependent Claim
45 words
Apparatus according to claim 4, wherein the means for operatively connecting the motor means to the rotatable means is such that the rollers will be rotated at a speed such that substantially no resultant tangential force will be exerted between the rollers and the pipe.
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) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |