公开(公告)号：CA2102881A1

公开(公告)日：1994-09-13

申请号：CA2102881

申请日：1993-11-10

Applicant: IBM

Inventor： BATCHELDER JOHN S ,  HALL SHAWN A ,  JACKSON ROBERT R

IPC: F04C2/00 ,  B29C47/60 ,  B29C48/395 ,  F04D3/02 ,  F04D29/18 ,  F04C13/00

Abstract: CONICAL LOGARITHMIC SPIRAL VISCOSITY PUMP A rotary viscosity pump is provided that has a housing and an impeller. The housing has a conical chamber with an outlet at a narrow end of the chamber. The impeller has a conical section with a logarithmic spiral groove along its exterior. The spacing between the housing and the impeller can have either a constant gap or a gap that decreases along the length of the impeller. The depth of the groove can be constant, increase, or decrease in depth along the length of the impeller.