Hydraulic lift rotary rake
AssigneeMiller-St. Nazianz, Inc.
InventorWalter N. Knigge
Life of this patent
Estimating the term…
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.
Claims20
A rotary rake for raking and windrowing hay comprising:
- a rotary gearbox for rotating a set of rake arms;
- a support frame for supporting and transporting the rotary rake, with the rotary gearbox being mounted above the support frame;
- hydraulic lifting means for raising and lowering the rake, said hydraulic lifting means being beneath the rotary gearbox;
- and
- hydraulic port means for providing fluid communication from a remote source of pressurized hydraulic fluid to the hydraulic lifting means, said hydraulic port means extending through the center of the rotary gearbox.
A rotary rake for raking and windrowing hay comprising:
- a rotary gearbox for rotating a set of rakes;
- a support frame and wheelbase assembly for supporting the rotary gearbox and for transporting the rotary rake;
- a linkage on the support frame for raising and lowering the rotary rake;
- a fluid-powered cylinder for operating the linkage;
- and
- a fluid port extending through the center of the rotary gearbox.
A rotary rake for raking and windrowing hay comprising:
- a support frame which includes a mechanical linkage for raising and lowering the rake;
- a rotary gearbox on the support frame for rotating a set of rake arms;
- a hydraulic fluid port extending through the center of the rotary gearbox;
- and
- a hydraulic cylinder on the support frame for operating the mechanical linkage.
Dependencies are inferred from the claim text.