GB747254A - Improvements in pneumatic cores for use in the casting of hollow or recessed concrete units - Google Patents
Improvements in pneumatic cores for use in the casting of hollow or recessed concrete unitsInfo
- Publication number
- GB747254A GB747254A GB2760752A GB2760752A GB747254A GB 747254 A GB747254 A GB 747254A GB 2760752 A GB2760752 A GB 2760752A GB 2760752 A GB2760752 A GB 2760752A GB 747254 A GB747254 A GB 747254A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pipes
- pneumatic
- cores
- walls
- concrete units
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/28—Cores; Mandrels
- B28B7/30—Cores; Mandrels adjustable, collapsible, or expanding
- B28B7/32—Cores; Mandrels adjustable, collapsible, or expanding inflatable
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Moulds, Cores, Or Mandrels (AREA)
Abstract
747,254. Pneumatic cores for casting concrete units. MATHEWS C. B. and AMBROSE, J. G. Feb. 3, 1954 [Nov. 3, 1952], No. 27607/52. Class 87(2) A pneumatic core comprises a steel top plate 12 and laterally spaced bottom plates 18, 19 to which are welded respectively pipes 14, 15, 16 and pipes 22. The pipes have longitudinal slots 17 taking flexible side walls 23. 24, 25, 26 made of "Rexine'' (Registered Trade Mark) which are fixed to rods 27 and reinforced by steel plates 33. Within walls 23, 24 and 25, 26 are inflatable rubber cores 30 which on deflation from an inflated position cause lower plates 18, 19 to turn about the outer rods 27 from the dotted line position 18', 19<1> to the full-line position 18, 19. The core may be used to form a cavity of, e.g., 7 or 8 inches width and 25 feet in length. For a smaller cavity a modification is used in which the walls 24 25 are attached to two separate pipes welded to the top plate 12 and spaced on the inner side of pipes 15, 16. Specifications 582,587 and 674,986 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2760752A GB747254A (en) | 1952-11-03 | 1952-11-03 | Improvements in pneumatic cores for use in the casting of hollow or recessed concrete units |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2760752A GB747254A (en) | 1952-11-03 | 1952-11-03 | Improvements in pneumatic cores for use in the casting of hollow or recessed concrete units |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB747254A true GB747254A (en) | 1956-03-28 |
Family
ID=10262373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2760752A Expired GB747254A (en) | 1952-11-03 | 1952-11-03 | Improvements in pneumatic cores for use in the casting of hollow or recessed concrete units |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB747254A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITCR20090026A1 (en) * | 2009-07-01 | 2011-01-02 | Ezio Ferrari | INFLATABLE BAG FOR THE REALIZATION OF VOLUMETRIC AND / OR SAGOMA DIMENSIONS. |
-
1952
- 1952-11-03 GB GB2760752A patent/GB747254A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITCR20090026A1 (en) * | 2009-07-01 | 2011-01-02 | Ezio Ferrari | INFLATABLE BAG FOR THE REALIZATION OF VOLUMETRIC AND / OR SAGOMA DIMENSIONS. |
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