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US3277538A Expired / Lapsed US ⏱️ 0.0 years remaining

Automatic core blowing machine

Assignee: Grinnell Corp
•
Filing: 1964-07-23
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Granted: 1966-10-11
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Expires: 1984-07-23
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Abstract

No abstract record available.

Inventors

  • 👤 William H L Bryce

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 10:37
CPC Classifications
B; B22; B22C; B22C7/00; B22C7/06; B22C7/067; B22C15/00; B22C15/23; B22C15/24

Claims Analysis

Total Claims: 1
Claim 1
Independent Claim 212 words
IN COMBINATION WITH A MACHINE FOR PRODUCING CORES FOR USE IN CASTING PROCESSES, A SUBSTANTIALLY HORIZONTAL TRACK POSITIONED BENEATH SAID MACHINE AND EXTENDING OUTWARDLY THEREFROM, A CORE BOX ADAPTED FOR MOVEMENT ALONG SAID TRACK AND MEANS FOR MOVING SAID CORE BOX ALONG SAID TRACK, SAID CORE BOX COMPRISING COPE AND DRAG PORTIONS HINGEDLY CONNECTED TOGETHER AND BEING PROVIDED ON THEIR MATING SURFACES WITH CORRESPONDING RECESSES IN THE SHAPE OF SAND CORE TO BE PRODUCED, THE COPE PORTION BEING PROVIDED WITH FILLING HOLES COMMUNICATING WITH SAID RECESSES FOR FILLING SAID RECESSES WITH CORE SAND, A CORE SAND BLOWING HEAD IN ASSOCIATION WITH SAID CORE BLOWING MACHINE AND MEANS ADAPTED TO TIGHTLY POSITION SAID CORE BOX BENEATH SAID BLOWING HEAD TO ENABLE THE FILLING OF SAID RECESSES WITH CORE SAND, MEANS POSITIONED ALONG SAID TRACK AT SOME DISTANCE FROM SAID MACHINE TO PROMOTE HARDENING OF SAID SAND CORES, A SUBSTANTIALLY V-SHAPED DIP PROVIDED IN SAID TRACK AT A DISTANCE FROM SAID SAND HARDENING MEANS AND WHEREBY THE COPE AND DRAG PORTIONS OF THE CORE BOX ARE OPENED ALONG THEIR HINGE CONNECTION TO DISCHARGE THE HARDENED SAND CORES, MEANS FOR CLEANING THE FILLING HOLES OF SAID COPE PORTION, AND MEANS FOR IMPARTING TO SAID CORE BOX A RECIPROCATING MOTION BETWEEN SAID MACHINE AND SAID DIP.

References Cited (Backward Citations)

US2732584A Cited
US1146736A Cited
US1794334A Cited
GB860646A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1969-10-10 1970-04-11 1970-10-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1973-10-10 1974-04-11 1974-10-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1977-10-10 1978-04-11 1978-10-11 $7700.00 Window Closed / Lapsed

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