Road structure – process – or apparatus – Pavement – Vault cover-closure
Patent
1992-06-15
1994-05-03
Rosenbaum, Mark
Road structure, process, or apparatus
Pavement
Vault cover-closure
404 25, E02D 2914
Patent
active
053081897
ABSTRACT:
The present invention is directed to a gripping system for holding a supporting ring member adapted to support a manhole cover in a tubular member having a peripheral horizontal shoulder. The gripping system has a plurality of rigid elbow-shaped members internally secured inside the ring member. The elbow-shaped members have a horizontal arm radially extending inside the ring member and a substantially vertical pending arm extending below the ring member and adapted to internally face the tubular member. A screw member is threadedly mounted through the vertical arm in the direction of the tubular member. The screw member is provided with a friction plate fixed at one end between the vertical arm and the tubular member for tightening the friction plate on the tubular member and for frictionally retaining the ring member to the tubular member. The friction force is adapted to vertically fix the ring member relative to the tubular member.
REFERENCES:
patent: 3773428 (1973-11-01), Bowman
patent: 3920347 (1975-11-01), Sauriol et al.
patent: 4305679 (1981-12-01), Modi
patent: 4466219 (1984-08-01), Campolito
patent: 4690584 (1987-09-01), LeBaron
patent: 4867600 (1989-09-01), Bowman
patent: 5039248 (1991-08-01), Bowman
Chin Frances
Rosenbaum Mark
LandOfFree
Gripping device for retaining a ring member supporting a manhole does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Gripping device for retaining a ring member supporting a manhole, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gripping device for retaining a ring member supporting a manhole will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2110807