A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Manhole cover locks, lockable manhole covers, and methods for locking a manhole cover
A locking assembly attachable to a manhole cover includes an arm disposable in a lowered position with the arm disposed in a first orientation engageable with a manhole frame supporting the manhole cover to inhibit removal of the manhole cover from a manhole frame, and disposable in a raised position and in a second orientation operable to allow removal of the manhole cover from the manhole frame. In an embodiment, the locking assembly may include the arm attached to a movable member having a spiral, helix, or curved groove and in which the movable arm is receivable in a bushing and a pin receivable in the groove.
Manhole cover locks, lockable manhole covers, and methods for locking a manhole cover
A locking assembly attachable to a manhole cover includes an arm disposable in a lowered position with the arm disposed in a first orientation engageable with a manhole frame supporting the manhole cover to inhibit removal of the manhole cover from a manhole frame, and disposable in a raised position and in a second orientation operable to allow removal of the manhole cover from the manhole frame. In an embodiment, the locking assembly may include the arm attached to a movable member having a spiral, helix, or curved groove and in which the movable arm is receivable in a bushing and a pin receivable in the groove.
Manhole cover locks, lockable manhole covers, and methods for locking a manhole cover
MITOLA ANTHONY F (author) / JORDAN LAWRENCE E (author) / O'DONNELL MICHAEL (author) / VAINAUSKAS JOSEPH (author)
2017-09-19
Patent
Electronic Resource
English
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