US3339239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Injection molding apparatus with diaphragm valve
Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1965-04-30
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Granted: 1967-09-05
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Expires: 1985-04-30
Abstract
No abstract record available.
Inventors
- 👤 Richard O Peck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:17
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/46; B29C45/26; B29C45/27; B29C45/28; Y; Y10; Y10S; Y10S425/00; Y10S425/229
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
IN A MOLDING UNIT FOR INJECTION MOLDING WITH LIQUID PLASTICS, A SPRUE ADAPTED TO RECEIVE MOLDED LIQUID FROM AN INJECTION NOZZLE, MEANS DEFINING A CHAMBER COMMUNICATING WITH SAID SPRUE AND WITH AT LEAST ONE MOLD CAVITY, A FLEXIBLE BLADDER MOUNTED IN SAID CHAMBER, A CHECK VALVE PISTON COOPERATING WITH SAID BLADDER AND MOUNTED FOR RECIPROCATING MOVEMENT PERPENDICULAR TO SAID BLADDER TO FORCE SAID BLADDER INTO SEALING ENGAGEMENT WITH SAID SPRUE TO PREVENT ESCAPE OF MOLDING LIQUID FROM SAID CHAMBER,
Claim 2
Dependent Claim
79 words
IN A MOLDING UNIT FOR INJECTION MOLDING WITH LIQUID PLASTICS, A SPRUE ADAPTED TO RECEIVE MOLDED LIQUID FROM AN INJECTION NOZZLE, MEANS DEFINING A CHAMBER COMMUNICATING WITH SAID SPRUE AND WITH AT LEAST ONE MOLD CAVITY, A FLEXIBLE BLADDER MOUNTED IN SAID CHAMBER, A CHECK VALVE PISTON COOPERATING WITH SAID BLADDER AND MOUNTED FOR RECIPROCATING MOVEMENT PERPENDICULAR TO SAID BLADDER TO FORCE SAID BLADDER INTO SEALING ENGAGEMENT WITH SAID SPRUE TO PREVENT ESCAPE OF MOLDING LIQUID FROM SAID CHAMBER,
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |