Abstract: A window assembly for an operator's cab of a vehicle includes an upper window section which is movable from a closed position to an open, stored position in the roof of the cab. The window assembly includes first and second upper locking mechanism and first and second lower locking mechanism, and first and second release levers for simultaneously releasing the upper and lower locking mechanism. Current designs of removable windows require difficult and awkward operations to lock and unlock the latching mechanisms and for moving the window between closed and open positions. The subject window assembly incorporates simple and easily operated locking and unlocking mechanisms, as well as a convenient apparatus for moving and storing the opened window sections.

Abstract: An excavator comprises an upper unit rotatably mounted on a tracked undercarriage. A swing gear mechanism is operatively connected between the upper unit and the undercarriage to selectively rotate the upper unit. An operator-controlled locking mechanism is positioned interiorly of the swing gear mechanism to selectively lock the upper unit relative to the undercarriage.