US3794458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum brick press having movable loading and unloading means
Assignee: Mitsuishi Fukai Tekkosho KK
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Filing: 1972-06-23
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Granted: 1974-02-26
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Expires: 1992-06-23
Abstract
Abstract A brick press includes a fixed lower frame and an upper movable frame. The upper movable frame has thereon an upper movable piston. Mounted on the lower fixed frame are parallel rails. A transfer table has mounted thereon a mold and is movable horizontally along the rails into and out of alignment with the upper movable piston. A lower piston is carried with the transfer table in alignment with the mold. First movable chamber forming means are mounted coaxial with the upper piston and adapted to seal against the top of the mold when the mold is aligned with the upper piston to create a sealed chamber, the pressure of which may be selectively reduced. Mounted beneath the transfer table and coaxial with the lower piston is a second chamber forming means which may be selectively engaged with the top of the lower fixed frame to form a second chamber, the pressure of which may be selectively reduced. When the mold is filled with brick material, the transfer table, mold and lower piston are moved into alignment with the upper piston. The upper and lower chamber forming means are then actuated to isolate the brick material. The pressure within these chambers and within the brick material is then reduced, and the upper piston is actuated to press the brick material against the lower piston. After the pressing operation, the upper piston is raised, the two chamber forming means are retracted, and the transfer table and mold are again moved along the rails out of alignment with the upper piston. Then the finished brick may be removed from the mold, and new brick material may be added thereto.
Inventors
- 👤 S Iwasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:03
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/0005; B30B15/0017; B28; B28B; B28B7/00; B28B7/40; B28B7/44; B30B11/00; B30B11/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
205 words
In a brick press of the type including a lower piston positioned above a lower frame, an upper piston mounted on an upper frame to oppose said lower piston, a mold for supporting brick raw material between said pistons, and means for moving one of said pistons toward the other for pressing therebetween said raw material; the improvement comprising transfer means supporting said mold and lower piston for substantially horizontal movement from a first piston out of alignment with said upper piston to a second position in alignment with said upper position; first chamber forming means to selectively create a first air tight chamber enclosing said upper piston and said raw material when said mold and lower piston are in said second position; second chamber forming means to selectively create a second air tight chamber enclosing said lower piston and said raw material when said mold and lower piston are in said second position; said raw material being enclosed in said chambers; and means to selectively create a vacuum in said chambers and within said raw material wherein said means to selectively create a vacuum in said second chamber comprises a conduit defined by said lower frame which conduit operatively communicates with said second chamber.
Claim 2
Dependent Claim
205 words
In a brick press of the type including a lower piston positioned above a lower frame, an upper piston mounted on an upper frame to oppose said lower piston, a mold for supporting brick raw material between said pistons, and means for moving one of said pistons toward the other for pressing therebetween said raw material; the improvement comprising transfer means supporting said mold and lower piston for substantially horizontal movement from a first piston out of alignment with said upper piston to a second position in alignment with said upper position; first chamber forming means to selectively create a first air tight chamber enclosing said upper piston and said raw material when said mold and lower piston are in said second position; second chamber forming means to selectively create a second air tight chamber enclosing said lower piston and said raw material when said mold and lower piston are in said second position; said raw material being enclosed in said chambers; and means to selectively create a vacuum in said chambers and within said raw material wherein said means to selectively create a vacuum in said second chamber comprises a conduit defined by said lower frame which conduit operatively communicates with said second chamber.
Claim 3
Dependent Claim
45 words
The improvement claimed in claim 1 wherein said transfer means comprises a rail-mounted transfer table having an opening therein, said mold being positioned on said transfer table above said opening, and said lower piston being positioned within said mold and extending downwardly through said opening.
Claim 4
Dependent Claim
97 words
The improvement claimed in claim 2 wherein said first chamber forming means comprises a first bellows surrounding said upper piston and having an upper end sealed to said upper frame and a lower end movable to create a seal with said mold when said mold is in said second position; and wherein said second chamber forming means comprises a second bellows surrounding said lower piston and having an upper end sealed to said transfer table and a lower end movable to create a seal with sAid lower frame when said lower piston is in said second position.
Claim 5
Dependent Claim
159 words
The improvement claimed in claim 3 wherein said first chamber forming means further comprises a first plate sealed to said lower end of said first bellows, at least one first servo-cylinder supporting said first plate on said upper frame, said servo-cylinder movable to selectively move said first plate toward and away from said mold, and a first resilient ring positioned on said first plate and adapted to contact said mold when said first servo-cylinder moves said first plate toward said mold; and said second chamber forming means further comprises a second plate sealed to said lower end of said second bellows, at least one second servo-cylinder supporting said plate on said transfer table, said second servo-cylinder movable to selectively move said second plate toward and away from said lower frame, and a second resilient ring positioned on said second plate and adapted to contact said lower frame when said second servo-cylinder moves said second plate toward said lower frame.
Claim 6
Dependent Claim
110 words
The improvement claimed in claim 2 wherein said first chamber forming means comprises a first cylinder surrounding said upper piston and having an upper end sealed to said upper frame, a first plate surrounding said first cylinder and creating a seal with the outer periphery thereof, at least one first servo-cylinder supporting said first plate on said upper frame, said first servo-cylinder movable to selectively move said first plate toward and away from said mold when said mold is in said second position, and a first resilient ring positioned on said first plate and adapted to contact said mold when said first servo-cylinder moves said first plate toward said mold.
Claim 7
Dependent Claim
114 words
The improvement claimed in claim 5 wherein said second chamber forming means comprises a second cylinder surrounding said lower piston and having an upper end sealed to said transfer table, a second plate surrounding said second cylinder and creating a seal with the outer periphery thereof, at least one second servo-cylinder supporting said second plate on said transfer table, said second servo-cylinder movable to selectively move said second plate toward and away from said lower frame when said lower piston is in said second position, and a second resilient ring positioned on said second plate and adapted to contact said lower frame when said second servo-cylinder moves said second plate toward said lower frame.
References Cited (Backward Citations)
US770251A
Cited
US3689186A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |