US3284858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding machine and head with pressure compensating provision
Assignee: —
•
Filing: 1964-02-18
•
Granted: 1966-11-15
•
Expires: 1984-02-18
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:31
CPC Classifications
B; B22; B22C; B22C15/00; B22C15/02; B22C15/08; Y; Y10; Y10S; Y10S425/00; Y10S425/019
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
149 words
A MOLDING MACHINE COMPRISING, IN COMBINATION, A FRAME, A FLASK SUPPORT, A FLASK ADAPTED TO BE SUPPORTED ON SAID FLASK SUPPORT, A HEAD ON SAID FRAME, AND MEANS TO MOVE SAID HEAD AND FLASK SUPPORT RELATIVE TO EACH OTHER, SAID HEAD COMPRISING A HEAD BOX CLOSED AT THE TOP, AN UPPER DIAPHRAGM MADE OF FLEXIBLE MATERIAL SUPPORTED INSIDE SAID HEAD AND DEFINING WITH SAID CLOSED TOP A CLOSED CHAMBER ADATPED TO CONTAIN FLUID UNDER PRESSURE, A LOWER DIAPHRAGM DISPOSED ON THE LOWER END OF SAID OPEN HEAD AND FORMING A CLOSED CHAMBER ADAPTED TO CONTAIN GAS OR LIQUID UNDER PRESSURE, A COMPENSATING PLUNGER IN SAID HEAD BETWEEN SAID DIAPHRAGMS, SAID PLUNGER BEING FREELY SLIDABLE UP AND DOWN IN SAID HEAD AND ENGAGING SAID LOWER DIAPHRAM AND ADAPTED TO ENGAGE SAID UPPER DIAPHRAGM, AND A RESILIENT PAD ON THE LOWER END OF SAID PLUNGER, SAID PAD ENGAGING SAID LOWER DIAPHRAGM.
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) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |