Sewing machine having a cooling air blower

Details Sewing machine having a cooling air blower Sewing machine having a cooling air blower

1978-01-12

1979-03-27

Jaudon, Henry

Sewing

Elements

Cooling

D05B 7100

Patent

active

041459857

ABSTRACT:
A sewing machine having a rotatable main shaft connected to a needle to reciprocate it includes an impeller or air fan which has a hub portion which is connectable to the main shaft of the sewing machine for rotation thereby. The impeller housing also includes a plurality of radially extending fans defining air flow passages therebetween and a central axially extending tubular inlet forming the inlet for inward axial flow and then radial outward flow and peripheral discharge for circulation of the air through a cooling chamber defined in the sewing machine below the oil pan housing part. The impeller also includes an exterior groove around the tubular part which defines a pulley for a V-belt so that the impeller may function as a drive for the shaft. In addition, a hand wheel is secured around the periphery of the tubular part to facilitate hand rotation of the shaft. The hand wheel advantageously includes an opening aligned with the opening of the impeller for the inflow of air therethrough.

REFERENCES:
patent: 3638594 (1972-02-01), Armstead et al.
patent: 3771478 (1973-11-01), Tranquilla et al.
patent: 3779188 (1973-12-01), Marforio
patent: 4062310 (1977-12-01), Gauch et al.

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