Patent US3253300A successfully refreshed from Google Patents.
US3253300A
Expired / Lapsed
US
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Mixing valve
Assignee: Black Clawson Co
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Filing: 1964-01-31
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Granted: 1966-05-31
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Expires: 1984-01-31
Abstract
No abstract record available.
Inventors
- 👤 Harvey H Gove
- 👤 Robert E Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:27
CPC Classifications
B; B01; B01F; B01F27/00; B01F27/27; B01F27/271; B29; B29C; B29C48/00; B29C48/25; B29C48/92; B01F27/2714; B29C48/36; B29C48/362; B29C48/47; B29C48/50; B29C48/505; B29C48/67; B01F25/00; B01F2025/91; B01F2025/912; B01F27/2711; B01F27/80; B29C2948/00; B29C2948/92; B29C2948/92504; B29C2948/92514; B29C2948/9258; B29C2948/9259; B29C2948/92609; B29C2948/92666; B29C2948/92704; B29C2948/92714; B29C2948/92742; B29C2948/92752; B29C2948/92809; B29C2948/92819; B29C2948/92952; B29C2948/92961; B29C48/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
AN EXTERNAL PLASTIC MIXING VALVE FOR ATTACHMENT TO RECIEVE A PLASTIC MELT FROM AN EXTRUDER TO SUBJECT THE PLASTIC MATERIAL TO A CONTROLLED DEGREE OF MIXING AND SHEAR, COMPRISING A VALVE BODY EXTERNAL TO AN EXTRUDER AND HAVING A MEANS DEFINING AN INLET ADAPTED TO RECEIVE SUCH PLACTIC MELT FROM AN EXTRUDER FOR MIXING THEREOF, MEANS IN SAID BODY DEFINING A CAVITY IN COMMUNICATION WITH SAID INLET, MIXING VALVE MEANS IN SAID BODY INCLUDING A FIRST VALVE MEMBER RECEIVED IN CLOSING RELATION TO SAID CAVITY AND HAVING AN OUTLET PORT, A SECOND VALVE MEMBER RECEIVED IN SAID CAVITY AND DEFINING WITH SAID FIRST VALVE MEMBER OPPOSED MIXING SURFACES SPACED FROM EACH OTHER AND DEFINING A TORTUOUS CLEARANCE SPACE THEREBETWEEN OF CONTROLLED DIMENSIONS LEADING FROM SAID CAVITY TO SAID OUTLET PORT, SHAFT MEANS IN SAID BODY MOUNTING SAID SECOND VALVE MEMBER FOR ROTATION, AND MEANS ADJUSTABLY MOUNTING SAID SHAFT MEANS AXIALLY IN RELATION TO SAID FIRST VALVE MEMBER FOR REGULATING THE EFFECTIVE SPACE BETWEEN SAID VALVE MEMBERS.
Claim 2
Dependent Claim
166 words
AN EXTERNAL PLASTIC MIXING VALVE FOR ATTACHMENT TO RECIEVE A PLASTIC MELT FROM AN EXTRUDER TO SUBJECT THE PLASTIC MATERIAL TO A CONTROLLED DEGREE OF MIXING AND SHEAR, COMPRISING A VALVE BODY EXTERNAL TO AN EXTRUDER AND HAVING A MEANS DEFINING AN INLET ADAPTED TO RECEIVE SUCH PLACTIC MELT FROM AN EXTRUDER FOR MIXING THEREOF, MEANS IN SAID BODY DEFINING A CAVITY IN COMMUNICATION WITH SAID INLET, MIXING VALVE MEANS IN SAID BODY INCLUDING A FIRST VALVE MEMBER RECEIVED IN CLOSING RELATION TO SAID CAVITY AND HAVING AN OUTLET PORT, A SECOND VALVE MEMBER RECEIVED IN SAID CAVITY AND DEFINING WITH SAID FIRST VALVE MEMBER OPPOSED MIXING SURFACES SPACED FROM EACH OTHER AND DEFINING A TORTUOUS CLEARANCE SPACE THEREBETWEEN OF CONTROLLED DIMENSIONS LEADING FROM SAID CAVITY TO SAID OUTLET PORT, SHAFT MEANS IN SAID BODY MOUNTING SAID SECOND VALVE MEMBER FOR ROTATION, AND MEANS ADJUSTABLY MOUNTING SAID SHAFT MEANS AXIALLY IN RELATION TO SAID FIRST VALVE MEMBER FOR REGULATING THE EFFECTIVE SPACE BETWEEN SAID VALVE MEMBERS.
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) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |