Browse Prior Art Database

Spring Forward Leg Handle

IP.com Disclosure Number: IPCOM000036854D
Original Publication Date: 1989-Nov-01
Included in the Prior Art Database: 2005-Jan-29
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Rachui, RA: AUTHOR

Abstract

Disclosed is a mechansim of an adjustable leg which is incremented from the front of the machine and serves as a handle.

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Spring Forward Leg Handle

Disclosed is a mechansim of an adjustable leg which is incremented from the front of the machine and serves as a handle.

The one-piece structure pivots about axis A and is spring loaded forward. A spring 4 loaded pawl 5 rides through the structure grooves as the structure is rotated counterclockwise (CCW) by the spring 12. An outside force (tabletop) stops the CCW rotation of the sturcture. When stopped the spring 4 loaded pawl 5 locks the structure through the grooves.

A free-to-pivot cam 9 has a working surface 6 larger than the outer perimeter of the grooves in the leg. The cam 9 stays stationary as the leg is rotated in a CCW direction. When passing the last groove, surface 7 of the leg contacts tenon 10 of the cam, rotating the cam in unison with the leg counterclockwise. During rotation, the spring-loaded pawl rests on the surface 6 of the cam. Since the cam surface has a larger radius, the leg now is free to pivot clockwise. Clockwise rotation is accomplished by pressure being applied in direction B to the structure. As the leg is completing its clockwise rotation, surface 8 contacts tenon 10 of the cam, causing rotation of the cam with the leg. The leg and cam are designed so the pawl ends up resting on surface 11 of the leg. With the platform at rest (flat), the leg stays within a cavity provided by the platform. Whereas, when the platform is tilted forward, the leg, by way of spring 12, automatically goes forward until stopped...