US3593373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding apparatus
Assignee: DAVID G LOOMIS
•
Filing: 1968-09-26
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Granted: 1971-07-20
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Expires: 1988-09-26
Abstract
Abstract Apparatus for dry pressing and isostatic pressing of ceramic powder to form pipe wherein a groove is provided near a pipe end by means of arcuate, metallic segments which are hydraulically pressed into the powder by flexible tooling. The adjacent portion of the pipe is formed by a punch.
Inventors
- 👤 David G Loomis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:53
CPC Classifications
B; B30; B30B; B30B11/00; B30B11/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
In a device according to claim 1, a. said end cover means including a cap provided with a base having a recess; b. said annular retaining ring being engaged with the periphery of said recess.
Claim 2
Dependent Claim
77 words
In a device according to claim 2, said end cover means including: a. an axial aperture; b. a punch slidably received within said axial aperture; c. a portion of said punch being communicable with said hydraulic fluid, whereby said punch is urged into the mold when such fluid is subjected to pressure; d. another portion of said punch being abuttable against said powdered material, whereby said pressure is transmissable to an end surface of said powdered material.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |