Motor driven drilling or chipping device

Details Motor driven drilling or chipping device Motor driven drilling or chipping device

1984-06-01

1986-09-16

Kazenske, E. R.

Boring or penetrating the earth

With means to simultaneously feed and rotate tool from a...

Constant rotation rate permitted regardless of change in...

173104, 173DIG3, F21C 300

Patent

active

046116702

ABSTRACT:
In a motor driven drilling or chipping device, a housing forms a sealed housing space containing a gear arrangement and an air cushion propulsion mechanism driven by the gear arrangement. The housing space is partially filled with lubricating oil. A pressure equalizing nozzle has a bore connecting the interior of the housing space to the ambient atmosphere outside the housing. The port at the end of the nozzle bore communicating with the housing space is enclosed by wall members forming a stilling chamber. The stilling chamber is in communication with the sealed housing space and is arranged so that regardless of the position of the drilling or chipping device, it is not flooded by the lubricating oil and the lubricating oil does not flow out of the stilling chamber through the nozzle bore.

REFERENCES:
patent: 2702534 (1955-02-01), Keylwert
patent: 3376939 (1968-04-01), Holzappel
patent: 3929195 (1975-12-01), Stiltz et al.
patent: 4183414 (1980-01-01), Tamai et al.

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