F - Mech Eng,Light,Heat,Weapons – 04 – B
Patent
F - Mech Eng,Light,Heat,Weapons
04
B
F04B 53/14 (2006.01) F04B 15/02 (2006.01) F04B 47/02 (2006.01) F04B 47/12 (2006.01)
Patent
CA 2284380
An improved coupling arrangement is provided for coupling connected to the top of a plunger which reciprocates in a pump barrel. The coupling provides fluid ports for discharging fluid from the bore of the plunger and coupling to the annulus between the coupling and pump barrel. The lower edge of the ports is positioned below the leading edge of plunger, or conversely the leading edge of the plunger is re- formed above the lower edge; of the coupling's ports. Accordingly, solids cannot be trapped between the leading edge of the plunger and barrel and pump live is markedly improved. Preferably the plunger's leading edge is formed by the novel coupling so that industry standard plunger's can be used. Further, the plunger's leading edge is preferably fitted with a wiper which is even more preferably backed by a stack of seals fitted into a pressure-equalized annulus located below the wiper.
Bennett Jones Llp
Conn Kenneth S.
LandOfFree
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