Joints and connections – With adjunctive protector – broken parts retainer – repair,... – Utilizing fluid pressure
Patent
1976-01-16
1977-03-08
Shedd, Wayne L.
Joints and connections
With adjunctive protector, broken parts retainer, repair,...
Utilizing fluid pressure
403334, 175 53, 403360, F16D 100, F16L 1700, F16L 2900
Patent
active
040110192
ABSTRACT:
The arrangement comprises an earth raise borer stem which is formed with a tapered surface, near one terminal end thereof, for slidably engaging and forming an interference fit with a similarly tapered collar within the center of a cutterhead. The stem further has, at the lowermost end thereof, according to one embodiment, a bolted-on flange plate which has a series of rectangular cutouts formed therein. The cutouts receive lugs which are also bolted onto a lowermost surface of the cutterhead. The cooperating tapered surfaces of the collar and the stem cooperate to react thrust and torque which is impressed through the stem to the cutterhead and the cutout flange plate impresses rotary torque onto the cutterhead by means of the lugs. The arrangement provides a simple and facile arrangement for replaceably coupling a stem and cutterhead. Coupling bolts are employed to insure and retain the interference fit, and also (by means not shown) can further be employed, as jacking bolts, to facilitate disassembly of the stem from the cutterhead. The cooperating tapered surfaces include an annular channel which has a conduit opening thereonto for the supply of hydraulic fluid under pressure to enable a break out or disassembly of the stem and cutterhead.
REFERENCES:
patent: 141018 (1873-07-01), Sparks
patent: 2931659 (1960-04-01), Novkov
patent: 3430461 (1969-03-01), Boylan
patent: 3698750 (1972-10-01), Eastcott et al.
patent: 3724239 (1973-04-01), Callstrat
patent: 3917009 (1975-11-01), Dyer et al.
Dively Charles R.
McDonald Michael C.
Ingersoll-Rand Company
Murphy Bernard J.
Shedd Wayne L.
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