US3659986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making concrete products
Assignee: Individual
•
Filing: 1970-03-16
•
Granted: 1972-05-02
•
Expires: 1990-03-16
Abstract
Abstract An apparatus for mass producing large concrete products, in assembly line manner, on a floor mounted conveyor system, with which various operations are performed at different stations along the conveyor. A sectional mold, for casting purposes, is prepared at a first station and then moved forward. At a second station on the conveyor, the mold is vibrated and filled with concrete, and then moved forward. At a third station, the concrete is completely sealed within the mold, and the mold is elevated, removed from the conveyor, rotated 180*, returned to the conveyor, and stripped from the casting. The casting is then moved along on the conveyor for storage.
Inventors
- 👤 Nathan L Gelbman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:11
CPC Classifications
B; B28; B28B; B28B5/00; B28B5/04
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
95 words
In apparatus for making concrete products, a conveyor mounted on a floor, an upwardly open mold on said conveyor having shafts projecting from opposite ends thereof, means for depositing wet concrete into said mold, means for closing the upwardly open portion of said mold, a lifting jack arranged to engage and disengage each of said shafts for elevating and lowering said mold relative to said conveyor, and a floor mounted carriage partially beneath said conveyor for supporting said lifting jacks and arranged to travel on said floor to laterally remove said mold from said conveyor.
Claim 2
Dependent Claim
95 words
In apparatus for making concrete products, a conveyor mounted on a floor, an upwardly open mold on said conveyor having shafts projecting from opposite ends thereof, means for depositing wet concrete into said mold, means for closing the upwardly open portion of said mold, a lifting jack arranged to engage and disengage each of said shafts for elevating and lowering said mold relative to said conveyor, and a floor mounted carriage partially beneath said conveyor for supporting said lifting jacks and arranged to travel on said floor to laterally remove said mold from said conveyor.
Claim 3
Dependent Claim
39 words
The subject matter set forth in claim 1, wherein said mold comprises a plurality of parts, and said lifting jacks are adapted to strip at least two of said mold parts from the concrete therein while on said conveyor.
Claim 4
Dependent Claim
38 words
The subject matter set forth in claim 1, wherein said mold comprises a plurality of parts, and said lifting jacks are adapted to strip, in immediate succession, at least two of said mold parts from the concrete therein.
Claim 5
Dependent Claim
24 words
The subject matter set forth in claim 1, wherein said carriage includes a substantially three sided, horizontally disposed frame having wheels contacting said floor.
Claim 6
Dependent Claim
23 words
The subject matter set forth in claim 1, wherein said carriage is provided with a wheel located directly under each of said jacks.
Claim 7
Dependent Claim
19 words
The subject matter set forth in claim 1, with the addition of power operated means for moving said carriage.
Claim 8
Dependent Claim
25 words
The subject matter set forth in claim 1, with the addition of mechanical guide means for maintaining said carriage in a single line of travel.
Claim 9
Dependent Claim
141 words
Apparatus for making concrete products comprising, a continuous conveyor having a plurality of conveyor sections mounted on a floor in end to end relation with each other, each of said conveyor sections being individually power operated, an upwardly open mold on one of said conveyor sections, said mold having shafts projecting from opposite ends thereof, means for moving said mold from one of said conveyor sections to another of said conveyor sections, means for depositing wet concrete into said mold, means for closing the upwardly open portion of said mold, a lifting jack arranged to engage and disengage each of said shaft for elevating and lowering said mold relative to said conveyor, and a floor mounted carriage partially beneath said conveyor for supporting said lifting jacks and arranged to travel on said floor to laterally remove said mold from said conveyor.
Claim 10
Dependent Claim
141 words
Apparatus for making concrete products comprising, a continuous conveyor having a plurality of conveyor sections mounted on a floor in end to end relation with each other, each of said conveyor sections being individually power operated, an upwardly open mold on one of said conveyor sections, said mold having shafts projecting from opposite ends thereof, means for moving said mold from one of said conveyor sections to another of said conveyor sections, means for depositing wet concrete into said mold, means for closing the upwardly open portion of said mold, a lifting jack arranged to engage and disengage each of said shaft for elevating and lowering said mold relative to said conveyor, and a floor mounted carriage partially beneath said conveyor for supporting said lifting jacks and arranged to travel on said floor to laterally remove said mold from said conveyor.
Claim 11
Dependent Claim
30 words
The subject matter set forth in claim 8, wherein said carriage includes a substantially three sided, horizontally disposed frame spaced slightly above said floor, and having wheels contacting the floor.
Claim 12
Dependent Claim
24 words
The subject matter set forth in claim 8, wherein each of said jacks is stabilized by vertically disposed fixed guide elements on said carriage.
Claim 13
Dependent Claim
119 words
In apparatus for making concrete products, a conveyor mounted on a floor, an upwardly open mold on said conveyor having shafts projecting from opposite sides thereof, means for depositing wet concrete into said mold, means for closing the upwardly open portion of said mold, a power operated lifting jack beneath each of said shafts, each of said jacks being arranged for vertical travel and adapted to engage and disengage said shafts for eLevating and lowering said mold relative to said conveyor, interconnected rack and gear mechanisms for synchronizing the travel of said jacks, and a carriage partially beneath said conveyor for supporting said jacks and arranged to travel on said floor to laterally remove said mold from said conveyor.
Claim 14
Dependent Claim
119 words
In apparatus for making concrete products, a conveyor mounted on a floor, an upwardly open mold on said conveyor having shafts projecting from opposite sides thereof, means for depositing wet concrete into said mold, means for closing the upwardly open portion of said mold, a power operated lifting jack beneath each of said shafts, each of said jacks being arranged for vertical travel and adapted to engage and disengage said shafts for eLevating and lowering said mold relative to said conveyor, interconnected rack and gear mechanisms for synchronizing the travel of said jacks, and a carriage partially beneath said conveyor for supporting said jacks and arranged to travel on said floor to laterally remove said mold from said conveyor.
Claim 15
Dependent Claim
20 words
The subject matter set forth in claim 11, with the addition of upright fixed guides for laterally stabilizing said jacks.
References Cited (Backward Citations)
US1574565A
Cited
US1736363A
Cited
US2298446A
Cited
US2394228A
Cited
CH269110A
Cited
US3223224A
Cited
US3528144A
Cited
US3530970A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |