Pressure relief valve for a round baler
AssigneeDeere & Company
InventorClement Humbert
Life of this patent
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Abstract
A pressure-relief valve is provided. The pressure-relief valve having a valve body with a passage that can be closed by a moving closure element. An electromagnet is mounted detachably on the valve body and interacts with an armature in driving connection with the closure element. A spring interacts with the closure element the bias tension of which can be changed by an adjustment element that can be moved manually relative to the valve body. The adjustment element and the valve body are constructed such that a manual change of the bias tension of the spring by means of the adjustment element is then possible only when the electromagnet is detached from the valve body. Also provided is a round baler employing such a pressure-relief valve.
Claims12
A pressure-relief valve comprising:
- a valve body with a passage that can be closed by a moving closure element;
- an electromagnet that interacts with a moving armature that is in driving connection with the closure element;
- and,
- a spring that interacts with the closure element, a bias tension of the spring being changeable by an adjustment element that can be moved manually relative to the valve body the adjustment element comprising a body and an adjustment screw that is screwed into a thread of the body and defines the bias tension of the spring wherein the adjustment screw can be one of fixed and covered permanently on the body of the adjustment element;
- wherein the electromagnet is mounted detachably on the valve body and,
- the adjustment element and the valve body being constructed such that a manual change of the bias tension of the spring by way of the adjustment element is possible only when the electromagnet is detached from the valve body and when the electromagnet has been removed from the valve body, a maximum, manually adjustable bias tension of the spring can be pre-defined.
A round baler with a bale chamber defined by one or more bale forming elements, wherein a tension of the one or more bale forming elements can be defined by means of a hydraulic cylinder whose pressure is determined by a pressure-relief valve comprising:
- a valve body with a passage that can be closed by a moving closure element;
- an electromagnet that interacts with a moving armature that is in driving connection with the closure element;
- and,
- a spring that interacts with the closure element, a bias tension of the spring being changeable by an adjustment element that can be moved manually relative to the valve body the adjustment element comprising a body and an adjustment screw that is screwed into a thread of the body and defines the bias tension of the spring wherein the adjustment screw can be one of fixed and covered permanently on the body of the adjustment element;
- wherein the electromagnet is mounted detachably on the valve body and,
- the adjustment element and the valve body are constructed such that a manual change of the bias tension of the spring by way of the adjustment element is possible only when the electromagnet is detached from the valve body and wherein when the electromagnet has been removed from the valve body, a maximum, manually adjustable bias tension of the spring can be pre-defined.
Dependencies are inferred from the claim text.