Mixing valve

• US 3,253,300 A
• Filed: 01/31/1964
• Issued: 05/31/1966
• Est. Priority Date: 01/31/1964
• Status: Expired due to Term

• Current Assignee: Harvey H. Gove, Robert E. Hoffman
• Original Assignee: Harvey H. Gove, Robert E. Hoffman
• Inventors: Gove, Harvey H., Hoffman, Robert E.
• Application Number:
  US04/341,645
• Time in Patent Office: 851 Days
• US Class Current: 165/64
• CPC Class Codes: B01F 2025/912 Radial flow
• CPC Class Codes: B01F 27/271 with means for moving the materials to be mixed radially between the surfaces of the rotor and the stator
• CPC Class Codes: B01F 27/2711 provided with intermeshing elements
• CPC Class Codes: B01F 27/2714 the relative position of the stator and the rotor, gap in between or gap with the walls being adjustable
• CPC Class Codes: B01F 27/80 with stirrers rotating about a substantially vertical axis
• CPC Class Codes: B29C 2948/92514 Pressure
• CPC Class Codes: B29C 2948/9259 Angular velocity
• CPC Class Codes: B29C 2948/92666 Distortion, shrinkage, dilatation, swell or warpage
• CPC Class Codes: B29C 2948/92704 Temperature
• CPC Class Codes: B29C 2948/92714 Degree of crosslinking, solidification, crystallinity or homogeneity
• CPC Class Codes: B29C 2948/92752 Colour
• CPC Class Codes: B29C 2948/92809 Particular value claimed
• CPC Class Codes: B29C 2948/92952 Drive section, e.g. gearbox, motor or drive fluids
• CPC Class Codes: B29C 2948/92961 Auxiliary unit, e.g. for external melt filtering, re-combining or transfer between units
• CPC Class Codes: B29C 48/03 characterised by the shape of the extruded material at extrusion
• CPC Class Codes: B29C 48/362 using static mixing devices
• CPC Class Codes: B29C 48/47 using discs, e.g. plasticising the moulding material by passing it between a fixed and a rotating disc that are coaxially arranged
• CPC Class Codes: B29C 48/67 having incorporated mixing devices not provided for in groups B29C48/52 - B29C48/66
• CPC Class Codes: B29C 48/92 Measuring, controlling or regulating

Claims

1. 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.