Non-clogging pumps

• US 3,291,473 A
• Filed: 02/06/1963
• Issued: 12/13/1966
• Est. Priority Date: 02/06/1963
• Status: Expired due to Term

• Current Assignee: Victor D. Sweeney, Walter U. Kaji
• Original Assignee: Victor D. Sweeney, Walter U. Kaji
• Inventors: Sweeney, Victor D., Kaji, Walter U.
• Application Number:
  US04/256,634
• Time in Patent Office: 1,406 Days
• US Class Current: 415/88
• CPC Class Codes: F04D 29/2227 for special materials
• CPC Class Codes: F04D 29/605 specially adapted for liquid pumps
• CPC Class Codes: F04D 7/065 for liquid metal
• CPC Class Codes: F05D 2300/20 Oxide or non-oxide ceramics
• CPC Class Codes: F05D 2300/22 Non-oxide ceramics

Claims

1. IN A PUMP COMPRISING A HOLLOW BODY DEFINING AN INLET OPENING AND AN OUTLET OPENING AND A CHAMBER PROVIDING LIQUID COMMUNICATION BETWEEN SAID OPENINGS, AND PUMPING MEANS COOPERATING WITH SAID CHAMBER AND OPENINGS TO DRAW A LIQUID STREAM INTO SAID INLET OPENING AND THROUGH SAID CHAMBER AND TO DISCHARGE THE SAME THROUGH SAID OUTLET OPENING, THE IMPROVEMENT IN SAID COMBINATION WHEREIN AN IMPERFORATE DEFLECTOR DISK IS MOUNTED FOR ROTATION ABOUT AN AXIS OF SAID INLET OPENING, THE DISK AND THE PERIPHERY OF SAID INLET OPENING BEING SPACED APART BY A DISTANCE LESS THAN THE MAXIMUM DIMENSION OF SOLID PARTICLES CAPABLE OF PASSING INTO AND THROUGH SAID PUMP WITH SAID LIQUID STREAM, SAID DISK BEING SUBSTANTIALLY NORMAL TO SAID AXIS.

14. IN A PUMP FOR MOLTEN METAL COMPRISING THE COMBINATION OF:

(A) A LOWER FOOT BODY IN THE FORM OF A REFRACTORY SLAB ADAPTED TO BE IMMERSED IN MOLTEN METAL OR OTHER LIQUID OF HIGH TEMPERATURE, HAVING UPPER AND LOWER FACES AND DEFINING A PUMP CHAMBER THEREIN, AND HAVING COAXIAL UPPER AND LOWER AXIALLY VERTICAL BORES OF THE SAME DIAMETER EXTENDING INTO THE PUMP CHAMBER THROUGH SAID UPPER AND LOWER FACES OF THE SLAB, RESPECTIVELY;

(B) A REFRACTORY CENTRIFUGAL IMPELLER BODY HAVING A PERIPHERY OF CYLINDRICAL CONTOUR AND AN INLET THAT OPENS AXIALLY INTO END ONLY THEREOF, SAID IMPELLER BODY PROJECTING INTO SAID PUMP CHAMBER AND BEING JOURNALLED IN SAID BORES;

AND (C) A VERTICALLY DISPOSED REFRACTORY PUMP SHAFT CONNECTED IN COAXIAL DRIVING RELATIONSHIP WITH SAID IMPELLER BODY;

THE IMPROVEMENT IN SAID COMBINATION WHEREIN THE BOTTOM FACE OF SAID SLAB IS FLAT AND DEFINES A PLANE PERPENDICULAR TO THE AXIS OF SAID BORES AND WHEREIN SAID SHAFT EXTENDS BEYOND SAID PLANE WITH AN IMPERFORATE DISK MOUNTED COAXIALLY THEREON AND SPACED OUTWARDLY FROM SAID PLANE, SAID DISK BEING NORMAL TO SAID SHAFT, THE SPACE BETWEEN SAID PLANE AND SAID DISK BEING LESS THAN THE MAXIMUM DIMENSION OF SOLID PARTICLES CAPABLE OF PASSING INTO AND THROUGH SAID PUMP WITH SAID LIQUID STREAM, THE DIAMETER OF SAID DISK BEING SLIGHTLY LESS THAN THE DIAMETER OF SAID PORTION PERMITTING WITHDRAWAL OF THE SHAFT MOUNTED DISK THROUGH SAID VERTICAL PORTION, WHEREBY SAID DISK ACTS TO RESTRICT PARTICLES AND AGGLOMERATES OF SOLID AND SEMI-SOLID MATERIALS LARGER THAN THE SPACING OF SAID DISK FROM PASSING THROUGH SAID PUMP.