초록 ▼

A pump includes a housing defining a cavity, at least one bore, a bore inlet, and a bore outlet. The bore extends from the cavity to the outlet and the inlet communicates with the bore at a position between the cavity and the outlet. A crankshaft is mounted in supports and has an eccentric portion d

A pump includes a housing defining a cavity, at least one bore, a bore inlet, and a bore outlet. The bore extends from the cavity to the outlet and the inlet communicates with the bore at a position between the cavity and the outlet. A crankshaft is mounted in supports and has an eccentric portion disposed in the cavity. The eccentric portion is coupled to a piston so that rotation of the crankshaft reciprocates the piston in the bore between a discharge position an intake position. The bore may be offset from an axis of rotation to reduce bending of the piston during crankshaft rotation. During assembly of the pump, separate parts of the housing can be connected together to facilitate installation of internal pumping components. Also disclosed is a method of reducing vapor lock by mixing vapor and liquid portions of a substance and introducing the mixture into a piston bore.

대표청구항 ▼

[ We claim:] [1.] A method of reducing vapor lock during pumping of a substance having a liquid phase and a vapor phase, comprising the steps of:introducing the substance into a chamber so that a liquid portion of the substance settles in the chamber below a vapor portion of the substance;allowing t

[ We claim:] [1.] A method of reducing vapor lock during pumping of a substance having a liquid phase and a vapor phase, comprising the steps of:introducing the substance into a chamber so that a liquid portion of the substance settles in the chamber below a vapor portion of the substance;allowing the vapor portion of the substance to pass into an intake tube through a first opening in the intake tube;introducing the liquid portion of the substance into the intake tube through a second opening in the intake tube so that the liquid portion of the substance mixes with the vapor portion of the substance;passing the mixture of the vapor portion and liquid portion from the intake tube to a bore; andreciprocating a piston in the bore to pump the mixture from the bore.