Abstract: A support system is provided for supportably securing a vertically movable support structure having a boom attached thereto to a floor structure of a building. The support structure extends through an opening formed in the floor structure. The support system includes a set of support brackets pivotably mounted relative to vertical support members of the support structure. The support brackets are supportably engageable with a portion of the support structure and a first floor structure in a first supporting position. The support brackets are freely swingable and movably engageable with a second floor structure as the support structure is moved relative to the second floor structure enabling the support brackets to be supportably engageable with the portion of the support structure and the second floor structure in a second supporting position.

Abstract: A climbing and support system is provided for a support structure having at least one vertical support member extending through at least one opening in a floor structure. The climbing and support system includes a ladder assembly attached to the vertical support member. A climbing cylinder arrangement and a locking bar structure are engageable with the ladder assembly, and are pivotally supported outside the vertical support member on the floor structure for vertically moving and supporting the support structure relative to the floor structure.

Abstract: A rotary rake is provided with a hydraulic lifting mechanism for raising and lowering the rake. A vertical shaft extending through the center of a rotary gearbox on the rake serves as a hydraulic fluid port. Pressurized hydraulic fluid from a remote source passes through the shaft to a hydraulic cylinder mounted on a support frame. The hydraulic cylinder operates a mechanical linkage which raises and lowers the rake. The mechanical linkage includes an over-center position for securely holding the rake in the raised position.