Abstract: An adjustable desk platform can include: an upper platform defining a substantially planar work surface; a base located beneath the upper platform, the base defining a bottom surface without legs that is adapted to sit on an existing desk; first and second sets of arms coupling the upper platform to the base, wherein the first and second sets of arms are adapted for movement of the upper platform substantially in parallel with the base between a fully raised position and a fully lowered position; and a user-operable locking mechanism associated with the upper platform, the locking mechanism adapted to releasably lock the upper platform in the fully raised position, and in at least one intermediate position between the fully raised position and the fully lowered position. Other features and embodiments are discussed.

Abstract: An adjustable desk platform can include: an upper platform defining a substantially planar work surface; a base located beneath the upper platform, the base defining a bottom surface without legs that is adapted to sit on an existing desk; first and second sets of arms coupling the upper platform to the base, wherein the first and second sets of arms are adapted for movement of the upper platform substantially in parallel with the base between a fully raised position and a fully lowered position; and a user-operable locking mechanism associated with the upper platform, the locking mechanism adapted to releasably lock the upper platform in the fully raised position, and in at least one intermediate position between the fully raised position and the fully lowered position. Other features and embodiments are discussed.

Abstract: An adjustable height desk platform includes: a platform including a substantially flat work surface and a lower surface opposite to the work surface; a first leg member and a second leg member coupled to the lower surface, the first leg member and the second leg member each movable between a fully raised position and a fully lowered position; a rack and pinion gear system associated with the first leg member and the second leg member; and a latch mechanism associated with the rack and gear system, the latch mechanism adapted to selectively immobilize the rack and pinion gear system to retain the first leg member and the second leg member in the fully raised position or the fully lowered position.

Abstract: An adjustable desk platform can include: an upper platform defining a substantially planar work surface; a base located beneath the upper platform, the base defining a bottom surface without legs that is adapted to sit on an existing desk; first and second sets of arms coupling the upper platform to the base, wherein the first and second sets of arms are adapted for movement of the upper platform substantially in parallel with the base between a fully raised position and a fully lowered position; and a user-operable locking mechanism associated with the upper platform, the locking mechanism adapted to releasably lock the upper platform in the fully raised position, and in at least one intermediate position between the fully raised position and the fully lowered position. Other features and embodiments are discussed.

Abstract: Adjustable desk platform includes an upper platform defining a first substantially planar work surface; a lower platform defining a second substantially planar work surface; at least one set of pivot arms connecting the lower platform and the upper platform, the set of pivot arms including a primary pivot arm and a secondary pivot arm. The set of pivot arms is adapted to move the upper platform substantially in parallel with the lower platform between a fully raised position and a fully lowered position. A locking mechanism includes a plurality of perforations located in the primary pivot arm or the secondary pivot arm, a locking set fixed with respect to the upper platform or lower platform, the locking set including at least one anchor adapted to selectively engage at least one of the plurality of perforations, and a handle connected to the anchor by a linkage.

Abstract: An adjustable desk platform includes an upper platform defining a substantially planar work surface. A lower platform is located beneath the upper platform. At least one set of pivot arms connect the lower platform and the upper platform, the set of pivot arms including a primary pivot arm and a secondary pivot arm. The set of pivot arms is adapted to move the upper platform substantially in parallel with the lower platform between a fully raised position and a fully lowered position. A locking mechanism is associated with the set of pivot arms. The locking mechanism is adapted to releasably lock the upper platform in the fully raised position and in the fully lowered position. A keyboard tray is suspended below the upper platform, the keyboard tray adapted to support a computer keyboard.