US4259054A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brick press frame having prestressed columns
Assignee: Venturedyne Ltd
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Filing: 1979-11-26
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Granted: 1981-03-31
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Expires: 1999-11-26
Abstract
Abstract A press is provided for forming articles from compressed refractory material such as bricks, the press including a press bed, a crown spaced from the press bed, and a plurality of prestressed support columns rigidly supporting the press bed and the crown in spaced apart relation. The support columns each include a central tie rod including one end extending through a portion of the press bed and including another end extending through a portion of the crown and rigidly engaging the crown. The support columns also include an outer hollow cylindrical member surrounding the tie rods, one end of each of the hollow cylindrical members being positioned against the upper surface of the bed and the opposite end of each of the hollow cylindrical members engaging a lower portion of the crown. The tie rods are subjected to a tensile force while the outer cylindrical members are simultaneously subjected to a compressive force thereby providing a rigid frame structure and one resistive to twisting. The outer cylindrical members also function to provide supporting columns for a mold table and provide for slidable movement of the mold table between the bed and the yoke. The outer cylindrical members also provide for slidable support of a movable crosshead and facilitate movement of the crosshead toward and away from the mold table.
Inventors
- 👤 William T. Savage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:35
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/04; B30B15/045; B30B15/042
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
269 words
A press for forming articles from compressed refractory material, the press comprising: a press bed, a crown spaced from said press bed, means for supporting said press bed and said crown in spaced apart relation, said supporting means including a plurality of tie rods, each of said tie rods having opposite ends, one of said opposite ends extending through at least a portion of said bed and engaging said bed, and the other of said opposite ends extending through at least a portion of said crown and engaging said crown, each of said tie rods being surrounded by an elongated hollow member, said elongated hollow members each including opposite ends, one of said opposite ends being positioned adjacent said bed and the other of said opposite hollow member ends being positioned adjacent said crown, a mold supported by said hollow members between said bed and said crown, said mold including a mold cavity for supporting refractory material therein, a press member supported for movement between a first position and a position wherein said press member compresses refractory material in said mold cavity, means for selectively forcing said press member into compressing engagement with the refractory material in said mold cavity, said means for forcing applying a torque on said crown when said press member compresses the refractory material, and means for subjecting said tie rods to tensile stress and for subjecting said hollow members to compressive stress and for causing said tie rods and said columns to resist twisting of said crown with respect to said bed when said press member compresses the refractory material in said mold cavity.
Claim 2
Dependent Claim
269 words
A press for forming articles from compressed refractory material, the press comprising: a press bed, a crown spaced from said press bed, means for supporting said press bed and said crown in spaced apart relation, said supporting means including a plurality of tie rods, each of said tie rods having opposite ends, one of said opposite ends extending through at least a portion of said bed and engaging said bed, and the other of said opposite ends extending through at least a portion of said crown and engaging said crown, each of said tie rods being surrounded by an elongated hollow member, said elongated hollow members each including opposite ends, one of said opposite ends being positioned adjacent said bed and the other of said opposite hollow member ends being positioned adjacent said crown, a mold supported by said hollow members between said bed and said crown, said mold including a mold cavity for supporting refractory material therein, a press member supported for movement between a first position and a position wherein said press member compresses refractory material in said mold cavity, means for selectively forcing said press member into compressing engagement with the refractory material in said mold cavity, said means for forcing applying a torque on said crown when said press member compresses the refractory material, and means for subjecting said tie rods to tensile stress and for subjecting said hollow members to compressive stress and for causing said tie rods and said columns to resist twisting of said crown with respect to said bed when said press member compresses the refractory material in said mold cavity.
Claim 3
Dependent Claim
33 words
A press as set forth in claim 1 and further including a crosshead supporting said press member, said crosshead being supported by said hollow members for movement toward and away from said mold.
Claim 4
Dependent Claim
41 words
A press as set forth in claim 2 wherein said press member comprises a plunger assembly, said plunger assembly including a plurality of spaced, generally parallel plungers extending downwardly from said crosshead for compressing refractory material supported by said mold table.
Claim 5
Dependent Claim
108 words
A press as set forth in claim 2 wherein said mold includes a plurality of mold cavities, each of said mold cavities having upper and lower openings, and further including a first plunger assembly supported by said bed and including a plurality of spaced parallel plungers extending upwardly, said plungers being adapted to be received in said mold cavities, and a second plunger assembly supported by said crosshead for movement toward and away from said mold, said second plunger assembly including a plurality of spaced parallel plungers adapted to be received in said mold cavities for compressing the refractory material when said crosshead is moved toward said mold.
Claim 6
Dependent Claim
66 words
A press as set forth in claim 1 wherein said opposite tie rod ends are threaded, and wherein said means for subjecting said tie rods to tensile stress includes a nut threadably positioned on one end of one of said tie rods and engaging said crown and a nut threadably positioned on the opposite end of said one of said tie rods and engaging said bed.
Claim 7
Dependent Claim
27 words
A press as set forth in claim 1 and further including means for preventing twisting of said hollow members with respect to said bed and said crown.
Claim 8
Dependent Claim
74 words
A press as set forth in claim 1 wherein said hollow members each include an upper end and a lower end, said crown includes a lower surface having bores therein, said upper end of said hollow members being fixedly housed in said bores in said crown, said bed includes an upper surface having a plurality of bores therein, said lower ends of said hollow members being fixedly housed in said bores in said bed.
Claim 9
Dependent Claim
71 words
A press as set forth in claim 1 wherein said hollow members each include a longitudinal axis and an upper end and a lower end, and further including means for preventing the upper ends of said hollow members from rotating about their longitudinal axes with respect to said crown and means for preventing the lower ends of said hollow members from rotating about their longitudinal axes with respect to said bed.
Claim 10
Dependent Claim
252 words
A press for forming articles from compressed refractory material, the press comprising: a press bed including an upper surface and a lower surface, a crown spaced from said press bed and including an upper surface and a lower surface, means for supporting said press bed and said crown in spaced apart relation, said supporting means including a plurality of tie rods, one of said opposite ends extending through at least a portion of said bed and engaging said bed, and the other of said opposite ends extending through at least a portion of said crown and engaging said crown, and elongated hollow cylindrical members surrounding said tie rods and compressed between said crown lower surface and said bed upper surface, a mold supported between said bed and said crown and having at least one cavity for supporting refractory material to be compressed, at least one press member supported for movement from a first position to a refractory material compressing position, means for selectively forcing said press member into compressing engagement with the refractory material in said mold cavity, said means for forcing said press member applying a twisting torque on said crown with respect to said press bed when said press member compresses the refractory material, and means for subjecting said tie rods to tensile stress and for subjecting said hollow cylindrical members to a compressive stress whereby said tie rods and said columns resist twisting of said crown with respect to said bed when said press member compresses the refractory material.
Claim 11
Dependent Claim
252 words
A press for forming articles from compressed refractory material, the press comprising: a press bed including an upper surface and a lower surface, a crown spaced from said press bed and including an upper surface and a lower surface, means for supporting said press bed and said crown in spaced apart relation, said supporting means including a plurality of tie rods, one of said opposite ends extending through at least a portion of said bed and engaging said bed, and the other of said opposite ends extending through at least a portion of said crown and engaging said crown, and elongated hollow cylindrical members surrounding said tie rods and compressed between said crown lower surface and said bed upper surface, a mold supported between said bed and said crown and having at least one cavity for supporting refractory material to be compressed, at least one press member supported for movement from a first position to a refractory material compressing position, means for selectively forcing said press member into compressing engagement with the refractory material in said mold cavity, said means for forcing said press member applying a twisting torque on said crown with respect to said press bed when said press member compresses the refractory material, and means for subjecting said tie rods to tensile stress and for subjecting said hollow cylindrical members to a compressive stress whereby said tie rods and said columns resist twisting of said crown with respect to said bed when said press member compresses the refractory material.
Claim 12
Dependent Claim
43 words
A press as set forth in claim 9 and further including a mold table supported by said hollow members between said bed and said crown, said mold table supporting said mold and being slidably supported for movement toward and away from said bed.
Claim 13
Dependent Claim
33 words
A press as set forth in claim 10 and further including a crosshead supported by said hollow members for movement toward and away from said mold table, said crosshead supporting said press member.
Claim 14
Dependent Claim
46 words
A press as set forth in claim 11 and wherein said press member comprises a plunger assembly supported by said crosshead, said plunger assembly including a plurality of spaced, generally parallel plungers extending downwardly from said crosshead for compressing refractory material supported by said mold table.
Claim 15
Dependent Claim
132 words
A press as set forth in claim 11 and further including a mold table supported for slideable movement on said hollow cylindrical members, said mold table supporting said mold, and wherein said mold includes a plurality of mold cavities, each of said mold cavities having upper and lower openings, a first plunger assembly supported by said bed and including a plurality of spaced parallel plungers extending upwardly, said plungers being adapted to be received in said mold cavity, and wherein said press member comprises a second plunger assembly supported by said crosshead for movement toward and away from said mold, said second plunger assembly including a plurality of spaced parallel plungers adapted to be received in said mold cavities for compressing the refractory material when said crosshead is moved toward said mold.
Claim 16
Dependent Claim
119 words
A press as set forth in claim 9 wherein said means for subjecting said tie rods to tensile stress and for subjecting said hollow cylindrical members to compressive stress includes nuts threadably supported on said tie rod opposite ends and wherein said means for subjecting said tie rods to tensile stress and said hollow cylindrical members to compressive stress further includes hydraulically actuated means associated with the nuts on the ends of said tie rods adjacent said bed lower surface for applying an elongating force to said tie rods after said nuts thereon have been initially seated so that said nuts can be subsequently re-seated to maintain said tie rods in the elongated condition resulting from said elongating force.
Claim 17
Dependent Claim
28 words
A press as set forth in claim 9 and further including means for preventing twisting of said hollow cylindrical members with respect to said bed and said crown.
Claim 18
Dependent Claim
77 words
A press as set forth in claim 9 wherein said hollow cylindrical members each include an upper end and a lower end, said crown includes a lower surface having bores therein, said upper end of said hollow cylindrical members being fixedly housed in said bores in said crown, said bed includes an upper surface having a plurality of bores therein, said lower ends of said hollow cylindrical members being fixedly housed in said bores in said bed.
Claim 19
Dependent Claim
74 words
A press as set forth in claim 9 wherein said hollow cylindrical members each include a longitudinal axis and an upper end and a lower end, and further including means for preventing the upper ends of said hollow cylindrical members from rotating about their longitudinal axes with respect to said crown and means for preventing the lower ends of said hollow cylindrical members from rotating about their longitudinal axes with respect to said bed.
References Cited (Backward Citations)
US1974148A
Cited
US3154006A
Cited
US3302556A
Cited
US3465669A
Cited
US3492696A
Cited
US3643592A
Cited
US3581656A
Cited
US3647332A
Cited
US3724364A
Cited
US3664784A
Cited
US3783774A
Cited
US3891375A
Cited
US4026207A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-30 | 1984-09-29 | 1985-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-30 | 1988-09-29 | 1989-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-30 | 1992-09-29 | 1993-03-31 | $7700.00 | Window Closed / Lapsed |