Erosion-preventing device for a lift-and-force pump
AssigneeSociete d'Etudes de Machines Thermiques
InventorDirk Bastenhof
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Abstract
An erosion-preventing device in a jerk-pump of the kind comprising a cylindrical plunger reciprocating longitudinally within a bore formed in a barrel mounted in the pump housing and including a common feed and by-pass duct opening into said bore, said erosion preventing device being constituted by a wall portion, inserted longitudinally into said common duct and consisting of a partition having the shape of a flat plate or strip and inserted into said common duct.
Claims11
A jerk-pump with an adjustable discharge flow rate, of the kind comprising a cylindrical plunger reciprocating longitudinally within a bore formed in a barrel mounted in the pump housing and including a common feed and by-pass duct opening into said bore, a groove-like recess having a substantially helical edge defining the effective delivery stroke of said plunger being formed in the external surface of said plunger, said pump being provided with an erosion-preventing device consisting of a wall portion inserted longitudinally into said common duct and defining a fluid return or by-pass passageway and a supply or feed passageway, wherein the improvement consists in that said wall portion consists of a partition having the shape of a flat plate or strip and inserted into said common duct.
Dependencies are inferred from the claim text.