Title:
CENTRIFUGAL FAN
Document Type and Number:
Japanese Patent JP3431485
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To surely hold extraction wires by fitting a plate-like member with the specific thickness to a window which is communicated with a groove formed on the back face of a side plate on the side facing the intake port of a casing and penetrates the side plate.
SOLUTION: A window 3, which is formed as an insertion hole for a metal mold on the side plate 1-2 of a casing for separating the metal mold when a pawl-like lug 4 is formed, is closed by a plate-like member 5. The plate-like member 5 is formed into the same shape as the inner shape of the window 3, and its thickness (t) is selected to satisfy t>d-D, where (d) is the clearance- between a groove bottom face 2-3 and the inside face 4-1 of the pawl-like lug 4, and D is the outer diameter of inserted extraction wires 6. The extraction wires 6 can be surely held with the plate-like member 5 kept at the stationary pressed and fitted state. Part of the air smoothly flowing along an inner passage side face 1-21 can be prevented from escaping from the window 3 by the plate- like member 5, thus the derivation of a hissing sound can be prevented.
Inventors:
Masahiro Mimura
Application Number:
JP5002198A
Publication Date:
July 28, 2003
Filing Date:
February 17, 1998
Export Citation:
Assignee:
Nippon Servo Co., Ltd.
International Classes:
F04D17/16; F04D29/42; (IPC1-7): F04D17/16; F04D29/42