US3662437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making hollow concrete articles
Assignee: Mid-Iowa Concrete Products Co
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Filing: 1970-05-14
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Granted: 1972-05-16
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Expires: 1990-05-14
Abstract
Abstract A machine having a rotatable and vertically movable table which includes four tile molds of four tiles each ninety degrees apart around the periphery of the table. A concrete source is provided at molding stations 180* apart while ejecting means are provided at oppositely disposed stations 180* apart. The table is rotated back and forth between the molding and ejecting stations. While two sets of tile, four each, are being formed two sets of tile, four each, are being ejected. The forming of the tile and the ejecting occur simultaneously as the table is raised and lowered relative to vertically stationary packer heads at the molding station and vertically stationary ejecting means at the ejecting station. A moisture sensitive probe automatically controls the concrete supply to provide the desired quantity of concrete at the molding stations.
Inventors
- 👤 Virgil L Long Sr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:05
CPC Classifications
B; B28; B28B; B28B13/00; B28B13/02; B28B13/0215; B28B5/00; B28B5/06; B28B5/08
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
134 words
An apparatus for making molded articles comprising, a stationary center table support frame having diametrically oppositely disposed vertically stationary ejector means and diametrically oppositely disposed vertically stationary packer heads thereby providing alternately diSposed molding and ejecting stations, a rotatable and vertically movable table on said center table support frame, four molds on the periphery of said table uniformly radially spaced apart, and control means including power means for rotating said table in opposite directions 90 degrees between first and second stations, and moving said table vertically in opposite directions at said first and second stations for said molds to alternately register with said ejector means and packer heads as said table is rotated back and forth between said first and second stations and raised and lowered at each of said first and second stations.
Claim 2
Independent Claim
134 words
An apparatus for making molded articles comprising, a stationary center table support frame having diametrically oppositely disposed vertically stationary ejector means and diametrically oppositely disposed vertically stationary packer heads thereby providing alternately diSposed molding and ejecting stations, a rotatable and vertically movable table on said center table support frame, four molds on the periphery of said table uniformly radially spaced apart, and control means including power means for rotating said table in opposite directions 90 degrees between first and second stations, and moving said table vertically in opposite directions at said first and second stations for said molds to alternately register with said ejector means and packer heads as said table is rotated back and forth between said first and second stations and raised and lowered at each of said first and second stations.
Claim 3
Dependent Claim
21 words
The structure of claim 1 wherein a material supply is provided at each of said molding stations for feeding said molds.
Claim 4
Dependent Claim
34 words
The structure of claim 2 wherein a conveyor extends under said table and under each of said ejecting stations to receive completed molded articles from said molds and move them to a remote location.
Claim 5
Dependent Claim
44 words
The structure of claim 1 wherein said molding stations include a reservoir above said table and in communication with said material supply, and locking means for locking said molds on said table to said reservoir upon said table being moved to said up position.
Claim 6
Dependent Claim
25 words
The structure of claim 1 wherein said control means includes a locking means for holding said table in each of said alternate positions of rotation.
Claim 7
Dependent Claim
22 words
The structure of claim 1 wherein each of said molds includes four chambers for forming a like number of hollow molded articles.
Claim 8
Dependent Claim
22 words
The structure of claim 1 wherein power means is provided for rotating said packer heads to shape said article in said molds.
Claim 9
Dependent Claim
48 words
The structure of claim 2 wherein sensor elements are provided at each of said molding stations and are electrically connected to a control means operatively connected to said material supply for controlling the flow of material into said molds upon it reaching a predetermined height in said molds.
Claim 10
Dependent Claim
36 words
The structure of claim 4 wherein powered rotatable vertically stationary scraper means are positioned adjacent said packer heads for cleaning the sidewalls of said reservoir, and said reservoir being movable upwardly and downwardly with said table.
References Cited (Backward Citations)
US2660769A
Cited
US3483600A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |