Adjustable table with an assistant device

What is this patent about?

’343 is related to the field of height-adjustable furniture, specifically focusing on the mechanical stabilization of scissor-leg tables that utilize pneumatic actuators. In traditional designs, air pressure bars often suffer from lateral displacement and uneven force distribution during height transitions, which leads to mechanical binding, premature seal failure, and structural instability.

The underlying idea behind ’343 is to decouple the structural guidance of the table's movement from the pneumatic actuator itself by introducing a dedicated linear guide rail system. By mounting the air pressure bar to a sliding carriage that travels along rigid parallel sticks, the invention ensures that the actuator only experiences axial forces, effectively shielding the internal seals of the rod from the bending moments inherent in a folding leg geometry.

The claims of ’343 focus on a specific mechanical assembly comprising a table board with two fasteners, a pair of crossing legs, and an assistant device that bridges the fasteners. This assistant device includes at least one sliding stick and a sliding member that is physically coupled to the body of the air pressure bar via a combining piece, ensuring the actuator and the sliding member move in unison along a fixed linear path.

In practice, the invention works by using a lever-actuated tab to trigger the stretching rod of the pneumatic cylinder. As the cylinder extends or retracts, the combining piece forces the sliding member to glide along the rigid sliding sticks, which in turn forces the pivot joint of the second foot to move linearly. This constrained motion translates the pneumatic force into a precise change in the angle of the crossing legs, raising or lowering the table surface.

This approach differs from prior solutions by replacing simple tube-in-tube friction locks or unsupported pneumatic struts with a reinforced sliding framework. By integrating the sliding sticks directly between the primary fasteners on the underside of the table, the invention creates a rigid chassis that prevents the table from wobbling or deforming under load, while simultaneously extending the operational life of the pneumatic components.