Insulated cooling boot for power tool

Details Insulated cooling boot for power tool Insulated cooling boot for power tool

1990-06-13

1991-04-09

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 43, 310 52, 310 83, 310 89, H02K 714, H02K 900, H02K 1514, H02K 710

Patent

active

050067400

ABSTRACT:
The in-line saw has a handle, a motor housing and a gear case which contains a drive mechanism which imparts a reciprocating action to the blade. The drive mechanism generates heat. The gear case is covered by an insulating boot which has internal ribs which contact the gear case and form air flow channels. The motor housing has air openings near the handle and the fan mounted on the motor drive shaft draws cooling air through the slots over the motor and out the space between the gear case and the motor housing except that the boot extends partially over the slot to divert air to the space between the boot and the case. The cooling air leaves the cooling space at the front of the boot to blow sawdust from the area of the blade. The boot is electrically insulating and covers the metal gear case.

REFERENCES:
patent: 2346778 (1944-04-01), Mitchell
patent: 2350631 (1944-06-01), Mitchell
patent: 2373842 (1945-04-01), Mitchell
patent: 2456571 (1948-12-01), Turner et al.
patent: 3413498 (1968-11-01), Bowen, III et al.
patent: 3432703 (1969-03-01), Sheps et al.
patent: 3476960 (1969-11-01), Rees
patent: 3491840 (1970-01-01), Haviland et al.
patent: 3694680 (1972-09-01), Jacyno
patent: 3903440 (1975-09-01), Paule et al.
patent: 4513214 (1985-04-01), Dieringer

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