Hydraulic and earth engineering – Earth treatment or control – Shoring – bracing – or cave-in prevention
Patent
1979-02-21
1981-10-06
Corbin, David H.
Hydraulic and earth engineering
Earth treatment or control
Shoring, bracing, or cave-in prevention
E21D 2308
Patent
active
042932483
ABSTRACT:
A walking roof support unit comprising first and second support assemblies isposed adjacent one another for being selectively spragged and released between the floor and the roof of a structure. Each support assembly includes a base, hydraulically operated first and second props extending vertically from the base in spaced parallel relation thereon and a roof beam supported on the props. The first and second support assemblies are coupled together for longitudinally advancing the assemblies step-wise and in sequence parallel to one another. The coupling between the assemblies includes a guide secured to the props of the first support assembly and a guide shoe slidably mounted on the guide for relative movement in the longitudinal direction. The guide has a longitudinal T-shaped slot and the guide shoe includes a longitudinal T-shaped projection slidably engaged in the slot. Two parallel transversely extending pull rods are respectively pivotably connected to the props of the second support assembly and to the guide shoe and an inclined pull rod is pivotably connected to one of the props of the second support assembly and to the guide shoe and extends diagonally between the two pull rods. A hyudraulic cylinder extends longitudinally and connects the guide and guide shoe for relatively displacing the same longitudinally.
REFERENCES:
patent: 3393522 (1968-07-01), Fontein
patent: 3524321 (1970-08-01), Wilkenloh et al.
patent: 3813886 (1974-06-01), Alacchi
Karmanski Stanislaw
Korecki Zbigniew
Pretor Wincenty
Rozmus Edward
Centralny Osrodek Projektowo-Konstrukcyjny Maszyn Gorniczych "Ko
Corbin David H.
LandOfFree
Walking roof support does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Walking roof support, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Walking roof support will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1204132