Rock bolt

Details Rock bolt Rock bolt

2011-06-21

2011-06-21

Singh, Sunil (Department: 3672)

Hydraulic and earth engineering

Earth treatment or control

Rock or earth bolt or anchor

Reexamination Certificate

active

07963725

ABSTRACT:
A rock bolt (10) which includes An elongate tubular member (18), which is formed with an inlet (22) through which a pressurized fluid can pass, into an interior of the tubular member (18), thereby to expand the tubular member (18) in a radial direction, an elongate shank (12) with a first end (14) which is secured to the tubular member (18) and a second end (16), and an expansion unit (26) which has a wedge-shaped member (44) at the second end (16) of the shank (12).

REFERENCES:
patent: 3469407 (1969-09-01), Kovacs
patent: 4312604 (1982-01-01), Fu et al.
patent: 4655644 (1987-04-01), Lane et al.
patent: 4664561 (1987-05-01), Frease
patent: 4954017 (1990-09-01), Davis et al.
patent: 5073064 (1991-12-01), Leonard et al.
patent: 564 654 (1975-07-01), None
patent: 37 04 969 (1988-08-01), None
patent: 44 45 625 (1996-06-01), None
patent: 02210199 (1990-08-01), None

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