Weber Knapp Company

Peter J Kerl

Donald R Pangborn

Richard L Watt

Michael G Wisniewski

Carl H Little

James R Caronia

Christopher T Hahn

Holly M Carlson

Ahmad Sith

A height adjustable mechanism for supporting a work surface for vertical movement relative to a base includes a counterbalance mechanism for providing a force opposing a downward force tending to lower the work surface; a brake mechanism for releasably retaining the work surface in a desired vertical position; a user operated release mechanism for selectively releasing the brake mechanism to permit vertical movement of the work surface; and an interlock mechanism for preventing release of the brake mechanism if the force and the downward force are out of balance by some given extent. In the preferred construction, the interlock mechanism includes an interlock plate supported by the base for pivotal movement between first and second blocking positions when the force is less than and greater than the downward force, respectively, through a neutral position when the force essentially corresponds to the downward force, and the release mechanism engages with the interlock plate when in the blocking positions thereof to prevent release of the brake mechanism by a user.

Safety interlock braking system for height adjustable table

A mechanism for mounting a keyboard supporting surface on a base including a linkage for mounting the surface for vertical swinging movement relative to the base and for vertical tilting movement relative thereto, a lock device for simultaneously locking the surface against swinging and tilting movements, a counterbalance spring for opposing downwardly directed swinging movement of said surface and a return spring for opposing downwardly directed tilting movement of said surface.

Keyboard mounting mechanism

Keyboard support

A counterbalance mechanism for vertically positioning a load includes auxiliary linkage means associated with an upper end of the mechanism for carrying a load and automatically varying the vertical angular orientation of the load incident to vertical movement of the load.

Counterbalance mechanism

Growing community of inventors

Angola, NY, United States of America

Peter J Kerl