A protection mechanism for a lubricant reservoir is mounted within a valve protection chamber disposed on an actuator. The protection mechanism includes a valve actuating plate and an elastic member biasing the valve actuating plate upwards. The actuator is pushed upwards by a rising level of lubricant as the lubricant reservoir is filled. When the reservoir is full, the actuator causes the valve actuating plate to contact a valve stem. The valve actuating plate pushes the valve stem up to shut off a flow of lubricant to the reservoir through the shut off valve. During an overfill event the actuator shifts upward due to the rising level of the lubricant in the reservoir. As the actuator shifts upward, the elastic member compresses such that valve actuating plate remains static relative to the lubricant reservoir as actuator rises.

A vent valve for an actuator disposed in a lubricant reservoir includes a bore extending through the plate, a seal disposed within the bore proximate a top surface of the plate, a retaining member extending about a lower opening of the bore, and a ball disposed within the bore between the seal and the retaining member. The vent valve is configured to allow air to pass from a lower portion of a lubricant reservoir as lubricant fills the lower portion. The vent valve also allows air to pass to the lower portion of the lubricant reservoir as lubricant is dispensed from the reservoir. The vent valve closes when the lubricant level reaches the vent valve, thereby preventing lubricant from flowing through the vent valve. The sealed vent valve allows the actuator to rise in response to a rising lubricant level.

An autofill shutoff valve includes a valve body mounted to a lubricant reservoir and secured to a fill tube extending into the reservoir. The autofill shutoff valve has a valve stem extending through the valve body and into the lubricant reservoir. The valve stem is actuated by a plate disposed within the reservoir from a first position, wherein lubricant flows from a lubricant inlet to a lubricant outlet through the valve body, to a second position, wherein the valve stem blocks the flow of lubricant through the valve body. The autofill shutoff valve provides lubricant directly to the reservoir, thereby eliminating external plumbing and the autofill shutoff valve also prevents overfill of the reservoir by cutting off the flow when the reservoir is full.

A centerfill assembly for a lubricant reservoir includes a hollow tube for receiving lubricant from the top of the reservoir and loading the lubricant into the reservoir near the bottom of the reservoir. Loading the lubricant near the bottom of the reservoir introduces lubricant near where the stirring paddles mix the lubricant and near where the lubricant is loaded to the lubricant pump. Adding the lubricant near where the pumps load and near the stirring paddles helps to eliminate air pockets in the lubricant. In addition, having the centerfill rod minimizes exterior plumbing and allows for the mounting of valves on the fill line

Valve assemblies and related pumps, plungers, lift assemblies, and methods may include an insert disposed in an internal flow path of a plunger. The insert includes protrusions, each individually extending into the internal flow path of the plunger and converging at an apex of the insert to define a cage in which the restriction element is configured to move axially through the internal flow path.

A foam pump for generating a foam comprising a foamable liquid and air has dual, coaxial air and liquid cylinders, each having a respective air and liquid piston which move together during a dispensing operation. In certain embodiments, the air and liquid cylinders are modular, separately formed components. In certain embodiments, a plurality of differently sized, liquid cylinders are provided, each with a corresponding liquid piston which is complementary in size thereto. Providing multiple differently sized liquid cylinder and piston components allows the pump to be configured to deliver a desired quantity of foamable liquid and/or a desired liquid-to-air ratio in the foam output of the pump. The differently sized liquid cylinder and piston components can be used interchangeably with a common air cup design and other common pump components, the modular construction allowing custom pump output configurations to be provided with minimal tooling investment per output size.

Present disclosure relates to an E-liquid supply mechanism and an electronic cigarette having the same. The E-liquid supply mechanism includes a stationary portion, a movable portion, and an E-liquid bottle. Stationary portion includes an E-liquid bottle lid, an E-liquid supply mechanism body, and an E-liquid supply intake tube. E-liquid supply mechanism body is attached to E-liquid bottle lid. E-liquid supply intake tube is attached to a low end of E-liquid supply mechanism body. Movable portion is positioned inside of E-liquid supply mechanism body and includes a press button, a first E-liquid tube, a supply piston, a second E-liquid tube, a spring, and a steel ball. First E-liquid tube is attached to the press button. The supply piston is attached to the first E-liquid tube. The second E-liquid tube is attached to the supply piston. The spring positioned under the second E-liquid tube, and the steel ball positioned under the spring.

A multistage air pump has a cylinder assembly, a second piston assembly slidably mounted through the cylinder assembly, and a first piston assembly protruding in the second piston assembly. Multiple chambers are defined in the multistage air pump, and communicate with each other via multiple one-way mechanisms. Air drawn into the multistage air pump is compressed in multiple stages within a single push, such that a large amount of high pressure air is provided.

A plunger sleeve for use in an artificial lift system for the production of hydrocarbons which includes an elongate body having an upper end, a lower end, and a central opening through the elongate body. The lower end includes a structural section forming at least a portion of the outer surface of the elongate body and a polymeric section forming at least a portion of an inner surface of the elongate body. At least a portion of the inner surface of the elongate body formed by the polymeric section within the lower end is configured to sealingly conform with a portion of an outer surface of a wellbore sealing device. An artificial lift system including the plunger sleeve and a method of proving artificial lift using the plunger sleeve is described.

A reciprocating pump includes an open-bottomed barrel adapted for attaching to the lower end of a production tubing string; a seating assembly having a cylindrical bore and adapted for mounting to a seating nipple at the upper end of the barrel; and a plunger assembly adapted for attaching to the lower end of a sucker rod string. The plunger assembly includes concentric upper and lower plunger sections interconnected by a double-valve, ported valve cage. The plungers are sized for sealing reciprocating engagement within, respectively, the bore of the seating assembly and the bore of the pump barrel. The lower plunger and the ported valve cage define a production chamber within the pump barrel. The upper plunger has ports allowing fluid flow from the tubing into the production chamber. Optionally, the upper plunger and the barrel may be provided with flush ports facilitating flushing of the pump to eliminate vapor lock.