Rotary shafts – gudgeons – housings – and flexible couplings for ro – Coupling facilitates relative axial motion between coupled... – Coupling between rotary drive table and axially movable...
Patent
1990-06-07
1993-11-23
Stodola, Daniel P.
Rotary shafts, gudgeons, housings, and flexible couplings for ro
Coupling facilitates relative axial motion between coupled...
Coupling between rotary drive table and axially movable...
464169, E21B 1707, E21B 1700, F16D 306, F16D 318
Patent
active
052638995
ABSTRACT:
A kelly-bar apparatus includes, for example, an inner kelly-bar, a second kelly-bar and an outer kelly-bar. These kelly-bars are relatively telescopically operable and torque is transmitted from outside to inside. When the second and outer kelly-bar are in a contracted position, they are supported by a spring on a spring support fixed to the inner kelly-bar. The bottom end of a torque transmitting projection of the inner kelly-bar is fitted into and welded to the spring support. The spring support is fixed onto an engagement member formed integrally with the inner kelly-bar. In addition, a stop member for preventing the second kelly-bar from coming away from the outer kelly-bar projects from the inner periphery of the outer kelly-bar at a location above the torque transmitting portion.
REFERENCES:
patent: 1067330 (1913-07-01), Griffin
patent: 1331309 (1920-02-01), Wright
patent: 1798480 (1931-03-01), McCullough
patent: 2007666 (1935-07-01), Smith
patent: 2991635 (1961-07-01), Warren
patent: 3249377 (1966-05-01), Weasler
patent: 3255612 (1966-06-01), Mayer et al.
patent: 3367142 (1968-02-01), Groves et al.
patent: 3388755 (1968-06-01), Webb
patent: 3492028 (1970-01-01), Seabourn
patent: 3866746 (1975-02-01), Curington
patent: 4241800 (1980-12-01), Stenuick
patent: 4552230 (1985-11-01), Anderson et al.
patent: 4568312 (1986-02-01), Geisthoff
patent: 4781359 (1988-11-01), Matus
Ajiro Shuichi
Kiue Akio
Kusumi Hiroshi
Miyata Ken-ichi
Nozaki Satoshi
Batista, Jr. William G.
Hitachi Construction Machinery Co. Ltd.
Stodola Daniel P.
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