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US 4,381,995 AGranted
In-line filter and flow control valve
AssigneeDeere & Company
InventorDerek M. Eagles
Life of this patent
Estimating the term…
Abstract
An in-line filter element is disposed within a tubular valve spool which shifts to either meter or shut-off fluid flow through the valve in response to a preselected pressure differential across the valve and element which is some value below a value which could result in damage to the filter element.
Claims4
An in-line filter assembly comprising:
- a filter housing defining a valve bore having an inlet at one end, an outlet at another end and an intermediate section between said one and another ends;
- a tubular valve element reciprocably mounted in the reduced diameter section of the bore;
- a filter element mounted in the valve element for intercepting all of the flow occurring between the inlet and the outlet;
- said filter housing defining a valve seat located between said outlet and said valve element;
- said valve element having a downstream end adapted for movement toward said valve seat for controlling the flow of fluid from the inlet to the outlet to at least restrict said flow when a predetermined pressure differential exists across the valve and filter elements;
- and yieldable biasing means acting between the housing and the valve element in a direction holding the valve element away from said seat.
3 more elements
Dependencies are inferred from the claim text.