Internal pressure explosion-proof construction for electrically-

Details Internal pressure explosion-proof construction for electrically- Internal pressure explosion-proof construction for electrically-

1989-07-20

1991-01-15

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

137883, 414 4, 901 23, H02K 928, B25J 300

Patent

active

049856537

ABSTRACT:
An internal pressure explosion-proof construction for an electrically-driven robot with which purging of airtight chambers of the robot in which electric motors are installed can be performed efficiently in a short time when air or inert gas is charged into the airtight chambers. The airtight chambers in which the electric motors are divided into a plurality of blocks, and an automatic opening and closing valve is provided at an outlet port connected to each of the blocks such that it may be opened only when the corresponding block is to be purged.

REFERENCES:
patent: 1875246 (1932-08-01), Lifland
patent: 4495968 (1985-01-01), Kist
patent: 4668146 (1987-05-01), Ageta
patent: 4698568 (1987-10-01), Nishizawa et al.
patent: 4732526 (1988-03-01), Nakashima et al.

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