Hinge joint for a screw planetary hydraulic drill
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United States of America Patent
Stats
-
Dec 3, 1985
Issued Date -
N/A
app pub date -
Jul 18, 1984
filing date -
Apr 28, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A casing having a gear ring formed on its inner wall and closed at each end with a cover is provided with two half-couplings arranged coaxially and having outer gear rings engaging the gear ring of the casing. A ball is disposed between the two half-couplings and the interior is filled with a lubricant. A seal is placed in the casing between each cover and the respective end face of the gear ring. Each seal is made out of an elastic material in the form of a sleeve embracing the half-coupling, and has one end abutting upon the end face of the gear ring and its other end secured to the half-coupling.
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