Manhole cover support ring

Details Manhole cover support ring Manhole cover support ring

1977-09-16

1978-06-27

Byers, Nile C.

Road structure, process, or apparatus

Pavement

Vault cover-closure

210163, 52 20, E02D 2914

Patent

active

040971716

ABSTRACT:
A manhole cover support ring adapted to be placed within an existing manhole frame for raising the height of a manhole cover. A circular ring is formed by a generally vertically extending flange having an annular bar welded on its lower end which provides an inwardly extending manhole cover support ledge. The flange and bar are split at a common point on their peripheries. A toggle mechanism is pivotally mounted on at least one of the spaced ends of the bar and is operatively engageable with the other bar end. Actuation of the toggle mechanism to an over center position expands the ring flange into abutting relationship with a complementary circular portion of the manhole frame which forms the manhole opening to secure the support ring on the manhole frame. The toggle mechanism includes a pivotally mounted bolt which is threadably engaged with a portion of one of the toggle levers for adjusting the outward expansion limit of the ring.

REFERENCES:
patent: 1517871 (1924-12-01), Thompson
patent: 2346361 (1944-04-01), Cupido
patent: 3218943 (1965-11-01), Bowman
patent: 3773428 (1973-11-01), Bowman
patent: 3891337 (1975-06-01), McCoy

Affiliated with

Also associated with

Rating

Manhole cover support ring does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Manhole cover support ring, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Manhole cover support ring will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2301693