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US 2011/0298197 A1Published application
Adjustable and Foldable V-Shaped Hay Rake
AssigneeSitrex S.r.l.
InventorsSilvano Menichetti, Sauro Petturiti
Life of this patent
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Abstract
The adjustable and foldable V-shaped hay rake which is the object of this invention is an agricultural tool used for raking hay on fields, in which, for each arm of the hay rake, all the mechanisms for moving the arm are centered on a single master support plate, that can simultaneously, both be very effectively used and easily adjusted, as well as providing the advantages of great simplicity of construction, great strength and a very economical cost of production.
Claims27
A hay rake comprising:
- a central frame;
- at least two wheels attached to the central frame;
- a tow bar attached to the central frame and extending in a frontward direction from the central frame;
- a wing assembly including
- an arm coupled to the central frame by a pivot joint defining a pivot axis about which the wing assembly is rotatable with respect to the central frame, the arm being adjustable among multiple fixed lengths,
- a wing coupled to an end of the arm opposite the pivot joint, the wing being adjustable among multiple fixed positions by rotating the wing with respect to the arm about a wing adjustment axis, wherein the only degree of freedom between the wing and the central frame is rotation about the pivot axis when the arm is in any one of its fixed lengths and the wing is in one of its fixed positions, and wherein the wing is arranged for mounting a plurality of hay rake wheels along a length of the wing, and
- an arm actuator mount fixedly coupled to the arm;
- a wing actuator having a first end coupled to the arm actuator mount and a second end coupled to the central frame, the actuator arranged to actuate the wing assembly between an outward position and an upward position;
- wherein
- the wing is horizontal and angled outwardly in the frontward direction when the wing assembly is in the outward position, and
- the pivot axis is skewed such that the wing is horizontal and parallel to the forward direction when the wing assembly is in the upward position.
8 more elements
A hay rake comprising:
- a central frame;
- at least two wheels attached to the central frame;
- a tow bar attached to the central frame and extending in a frontward direction from the central frame;
- a wing assembly including
- an arm coupled to the central frame by a double axis hinge defining two pivot axes about which the wing assembly is rotatable with respect to the central frame, the arm being adjustable among multiple fixed lengths,
- a wing coupled in a fixed position to an end of the arm opposite the pivot joint, the wing being adjustable among multiple fixed positions by rotating the wing with respect to the arm about a wing adjustment axis, wherein the only degree of freedom between the wing and the central frame is rotation about the pivot axes when the arm is in any one of its fixed lengths and the wing is in one of its fixed positions, and wherein the wing is arranged for mounting a plurality of hay rake wheels along a length of the wing, and
- an arm actuator mount fixedly coupled to the arm, the arm actuator being a linear actuator;
- a wing actuator having a first end coupled to the arm actuator mount and a second end coupled to the central frame, the actuator arranged to actuate the wing assembly between an outward position and an upward position;
- wherein
- the wing is horizontal and angled outwardly in the frontward direction when the wing assembly is in the outward position, and
- the joint is arranged such that the wing is moved into a position horizontal and parallel to the forward direction by the linear actuation of the arm actuator.
8 more elements
A hay rake comprising:
- a central frame;
- at least two wheels attached to the central frame;
- a tow bar attached to the central frame and extending in a frontward direction from the central frame;
- a wing assembly including
- an arm coupled to the central frame at a pivot joint which allows the wing assembly to rotate with respect to the central frame,
- a wing coupled to an end of the arm opposite the pivot joint, the wing being arranged for mounting a plurality of hay rake wheels along a length of the wing,
- an actuator mount coupled to the arm, the actuator mount being configured to couple to an actuator arranged to cause rotation of the wing assembly about the pivot joint between an outward position and an upward position, and
- a spring hook coupled to the arm;
- and
- a spring structure coupled to the central frame, the spring structure including a spring and an engagement element, the spring applying resistance when the engagement element is moved with respect to the central frame;
- wherein
- the spring hook is arranged to engage the engagement element when the wing assembly is moved from the upward position to the outward position so as to provide a spring force against downward rotation of the wing assembly, and
- the engagement of the of the engagement element by the spring hook causes the engagement element to extend away from the spring.
10 more elements
A hay rake comprising:
- a central frame;
- at least two wheels attached to the central frame;
- a tow bar attached to the central frame and extending in a frontward direction from the central frame;
- a wing assembly including
- an arm coupled to the central frame by a pivot joint defining a pivot axis about which the wing assembly is rotatable with respect to the central frame,
- a wing coupled to an end of the arm opposite the pivot joint, the wing being adjustable among multiple positions by rotating the wing with respect to the arm about a wing adjustment axis wherein the wing is arranged for mounting a plurality of hay rake wheels along a length of the wing, and
- a wing adjustment actuator arranged to rotate the wing about the wing adjustment axis;
- and
- a wing assembly actuator arranged to actuate the wing assembly between an outward position and an upward position.
6 more elements
Dependencies are inferred from the claim text.