US3591903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isostatic press with multipart mold
Assignee: National Forge Co
•
Filing: 1969-10-15
•
Granted: 1971-07-13
•
Expires: 1989-10-15
Abstract
Abstract A multipart mold for an isostatic press, the mold including an elastomeric container having a cavity for receiving a powder to be isostatically compressed, the container having a first part mounted in fixed position in a fluid pressure chamber, a second part extending through the container to the cavity which, when removed, forms a passage for the powder to be compressed, and a third part which, when the powder is compressed, for a support for the molded powder and for removing the molded article.
Inventors
- 👤 Arnold G Bowles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:45
CPC Classifications
B; B30; B30B; B30B11/00; B30B11/001; B28; B28B; B28B3/00; B28B3/003; B30B15/00; B30B15/02; B30B15/022; B30B15/024
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
136 words
An isostatic press for molding of powder, said press having a fluid pressure chamber, an elastomeric container in said fluid pressure chamber, said elastomeric container having a cavity therein for receiving powder to be isostatically compressed and molded, said elastomeric container having a first part mounted in fixed position in said fluid pressure chamber, a second part extending through said container and to said cavity which, when removed, forms a passage for the delivery of powder to be molded to said cavity and a third part extending through said container and to said cavity upon which, when said powder is compressed and molded in said cavity, the molded powder article is supported and means for removing said second and third container parts from, and repositioning said second and third container parts in, said first container part.
Claim 2
Dependent Claim
136 words
An isostatic press for molding of powder, said press having a fluid pressure chamber, an elastomeric container in said fluid pressure chamber, said elastomeric container having a cavity therein for receiving powder to be isostatically compressed and molded, said elastomeric container having a first part mounted in fixed position in said fluid pressure chamber, a second part extending through said container and to said cavity which, when removed, forms a passage for the delivery of powder to be molded to said cavity and a third part extending through said container and to said cavity upon which, when said powder is compressed and molded in said cavity, the molded powder article is supported and means for removing said second and third container parts from, and repositioning said second and third container parts in, said first container part.
Claim 3
Dependent Claim
46 words
An isostatic press, as recited in claim 1, in which said means for removing and repositioning said second and third container parts in said first container part includes means for locking said second and third parts in said first part, when said parts are positioned therein.
Claim 4
Dependent Claim
26 words
An isostatic press, as recited in claim 2, in which said fluid pressure chamber includes a housing and said locking means includes means on said housing.
Claim 5
Dependent Claim
23 words
An isostatic press, as recited in claim 3, in which said press includes means for supplying fluid pressure to said fluid pressure chamber.
Claim 6
Dependent Claim
35 words
An isostatic press, as recited in claim 4, in which said fluid pressure chamber includes a sleeve and an elastomeric pressure bag on one side of said sleeve between said sleeve and said elastomeric container.
Claim 7
Dependent Claim
40 words
An isostatic press, as recited in claim 5, in which said press includes a conveyor and said means for removing said third part of said elastomeric container includes means for transferring the molded powder article supported thereon to said conveyor.
References Cited (Backward Citations)
US2152738A
Cited
US3034191A
Cited
US3220103A
Cited
US3193900A
Cited
US3313871A
Cited
US3239591A
Cited
US3454997A
Cited
US3477096A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |