Lubricating grease return valve
AssigneeGurtech (Pty) Ltd
InventorRichard Stillard Gurney
Life of this patent
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Abstract
An apparatus for the relief of grease under pressure in the delivery line of grease guns and similar pressure delivery devices includes a 3-port valve in which the relief port is located between the delivery and inlet ports and includes a one way flow control valve mounted therein. The one way flow control valve is maintained in a closed position by the pressure of the grease and is activated to be opened to reduce the pressure in the valve body and allow the grease to return to the grease reservoir.
Claims13
1-12. (canceled)
An apparatus for the return of grease under pressure from within the delivery line of a grease gun or similar displacement mechanism to the grease gun reservoir, the apparatus comprising a three-port valve body located prior to the delivery line, in which the valve body includes a pressure inlet port, a delivery port to which the delivery line is attached and a pressure relief port located between them, the pressure relief port including a one way flow control valve mountable therein and an activation means for the one way flow control valve;
- the one way flow control valve being maintained in a closed position by the pressure of grease within the three-port valve body and is activated to be opened when required;
- characterized in that the relief port is linked to the grease gun reservoir by an elongated passage to permit grease under pressure to be returned to the grease gun reservoir on activation of the one way flow control valve, thereby allowing the delivery line pressure to reduce to atmospheric pressure.
Dependencies are inferred from the claim text.