Hydraulic advancing support frame

Details Hydraulic advancing support frame Hydraulic advancing support frame

1997-08-22

1999-10-05

Bagnell, David

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

405290, E21D 1552

Patent

active

059612541

ABSTRACT:
An advancing support frame is connected to the face conveyor (9) via an advancing rod (7) engaging with the advancing cylinder (5). A lifting cylinder (10) is supported on the advancing rod (7), with which the base shoes (1) are lifted during the advancing process. The lifting cylinder (10) is guided so as to be able to move in height in longitudinal guides (15) on the inner sides of the base shoes (1). A U-shaped tension stirrup (18), whose shanks (19) directed towards the ground have elongated holes (20), is supported centrally by the lifting cylinder (10) and joined to the base shoes (1) via carrying bolts (21) fastened to them.

REFERENCES:
patent: 4600340 (1986-07-01), Rosenberg
patent: 4940363 (1990-07-01), Brown et al.
patent: 4978248 (1990-12-01), Sprenger et al.
patent: 5039257 (1991-08-01), Bithell
patent: 5100263 (1992-03-01), Woodford et al.
patent: 5252006 (1993-10-01), Plevak

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