Concealed hinge puts the lid on tripping hazards

Nov. 6, 2003
Custom concealed hinges from Weber Knapp, Jamestown, N.Y., keep utility cover plates flush with floors in convention centers.

Four-bar-link hinges from Weber Knapp keep cover plates flush with the floor.

Custom concealed hinges from Weber Knapp, Jamestown, N.Y. (www.webberknapp.com), keep utility cover plates flush with floors in convention centers. The covers conceal a series of trenches containing Walker Systems, West Hartford, Conn. (www.wiremold.com), power cables and connectors. The approach eliminates the tripping hazards of exposed hinges and electrical cables cluttering the floor. And it cleans up unsightly electrical cables dangling from ceilings.

Weber Knapp opted for a four-bar-link hinge because the flush-with-floor spec ruled out straight-pivot designs. The hinges move covers upward until they clear floor level, then swing them away for easy access to trenches. Covers are up to 6 ft long and weigh about 100 lb. Offsetting the weight is a counterbalancing spring and friction-control system. It lets one person open a cover with minimal effort and holds the cover in position until closing.

-- Lawrence Kren

Sponsored Recommendations

Drive systems for urban air mobility

March 18, 2025
The shift of some of our transport traffic from the road to the air through urban air mobility is one of the most exciting future fields in the aerospace industry.

Blazing the trail for flying robots

March 18, 2025
Eight Bachelor students built a flying manipulator that can hover in any orientation and grasp objects. The drone is even more maneuverable than a quadrocopter and was designed...

Reachy 2: The Open-Source Humanoid Robot Redefining Human-Machine Interaction

March 18, 2025
Reachy 2 was designed to adapt to a wide variety of uses thanks to its modular architecture.

maxon IDX: The plug-and-play solution

March 18, 2025
IDX drives combine power with small space requirements - a brushless BLDC motor combined with an EPOS4 positioning controller and a gearhead inside a high-quality industrial housing...

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!