Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Repair – replacement – or improvement
Patent
1996-11-27
1999-05-18
Graysay, Tamara L.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
Repair, replacement, or improvement
175 73, E21B7/04;7/08
Patent
active
059044446
ABSTRACT:
A propelling apparatus includes a plurality of propellant cylinders series-connected to each other to be propelled by receiving a pushing force from behind, joints for series-connecting the propellant cylinders, a propellant head connected to a forward-most end of the propellant cylinders to be pressed into the earth, a leader member constituting a leading end of the propellant head, the leader member being rotatable about an axis of the propellant head by receiving a driving force from a driving device. An inclined pressure-receiving face is formed at a forward portion of the leader member for receiving an earth pressure in association with the underground propelling movement of the propellant head and steering the propellant head toward the direction of application of the earth pressure to the pressure-receiving face. The joint includes a flexible joint which is pivotally flexible about a transverse axis extending normal to an axis of the propellant cylinder.
REFERENCES:
patent: 2167194 (1939-07-01), Anderson
patent: 2694549 (1954-11-01), James
patent: 4523652 (1985-06-01), Schuh
patent: 5322391 (1994-06-01), Fisk
patent: 5350254 (1994-09-01), Fisk et al.
patent: 5535835 (1996-07-01), Walker
patent: 5597046 (1997-01-01), Fisk
patent: 5695014 (1997-12-01), Jenne
Hattori Masaya
Kabeuchi Teruo
Mukuno Katsuhiko
Nakagawa Masao
Okuyama Shigeaki
Graysay Tamara L.
Kubota Corporation
Mayo Tara L.
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