A multiple pump system is disclosed. The multiple pump system may include a fluid tank and a multiple pump vessel connected to the fluid tank. The multiple pump vessel may include at least one first pump and at least one second pump located therein. In addition, the at least one first pump may be configured to dispense a fluid from the fluid tank at a first pressure, and the at least one second pump may be configured to dispense the fluid from the fluid tank at a second pressure. The first pressure may be different from the second pressure, such that the at least one first pump may be configured to dispense liquefied natural gas, and the at least one second pump may be configured to dispense compressed natural gas.

Various fluid dispensing units having a defrosting system and methods for using the same are provided. In general, a fluid dispensing unit configured to dispense fluid such as AUS32 therefrom is configured to circulate the fluid when the fluid dispensing unit is not in use, e.g., is not dispensing the fluid, to help prevent the fluid from freezing or beginning to crystallize. In the event that the fluid freezes or begins to crystallize, such as due to a power failure that prevents the fluid from circulating, the fluid dispensing unit has a defrosting system configured to heat the frozen or crystallized fluid.

An apparatus for dispensing a liquid into one or more cavities of one packaging shells for ophthalmic lenses, comprises a dispenser block, a dispenser head separate from the dispenser block. The apparatus further comprises one or more tubes connecting the dispenser block and the dispenser head. Additionally, the dispenser block comprises a reservoir for the liquid to be dispensed, and one or more dosing pumps for conveying the liquid from the reservoir to the dispenser head. The dispenser head comprises one or more dispensing tips detachably arranged on the dispenser head, each of the dispensing tips being in fluid communication with the dispenser block by a separate one of the one or more tubes.

An apparatus for dispensing a liquid into one or more cavities of one packaging shells for ophthalmic lenses, comprises a dispenser block, a dispenser head separate from the dispenser block. The apparatus further comprises one or more tubes connecting the dispenser block and the dispenser head. Additionally, the dispenser block comprises a reservoir for the liquid to be dispensed, and one or more dosing pumps for conveying the liquid from the reservoir to the dispenser head. The dispenser head comprises one or more dispensing tips detachably arranged on the dispenser head, each of the dispensing tips being in fluid communication with the dispenser block by a separate one of the one or more tubes.

A chemical solution supply part for supplementing the chemical solution to the chemical solution storage tank and a purge gas supply part for supplying N.sub.2 gas as a purge gas to the chemical solution storage tank are in communication with the chemical solution storage tank, and a first manometer serving as a pressure measurement part is arranged on the chemical solution storage tank. In addition, a drain piping is connected to a head portion of the plunger pump, and an automatically controlled air-bleed valve, which is an air-bleed mechanism, is arranged on the drain piping. On the other hand, a second manometer is arranged in the middle of the chemical solution supply pipe, and a front end of the solution supply pipe on the downstream side serves as an injection point for the chemical solution S.

A chemical solution supply part for supplementing the chemical solution to the chemical solution storage tank and a purge gas supply part for supplying N.sub.2 gas as a purge gas to the chemical solution storage tank are in communication with the chemical solution storage tank, and a first manometer serving as a pressure measurement part is arranged on the chemical solution storage tank. In addition, a drain piping is connected to a head portion of the plunger pump, and an automatically controlled air-bleed valve, which is an air-bleed mechanism, is arranged on the drain piping. On the other hand, a second manometer is arranged in the middle of the chemical solution supply pipe, and a front end of the solution supply pipe on the downstream side serves as an injection point for the chemical solution S.

A distribution station includes a mobile trailer, a pump on the mobile trailer, at least one manifold on the mobile trailer and fluidly connected with the pump, a plurality of reels on the mobile trailer, and at least one fluid storage tank extending under the reels. A plurality of hoses are connected with a different one of the reels. A plurality of valves on the mobile trailer are situated between the at least one manifold and a respective different one of the reels. A plurality of fluid level sensors are associated with a different one of the hoses, and a controller is configured to individually open and close the valves responsive to the fluid level sensors.

A distribution station includes a mobile trailer, a pump on the mobile trailer, at least one manifold on the mobile trailer and fluidly connected with the pump, a plurality of reels on the mobile trailer, and at least one fluid storage tank extending under the reels. A plurality of hoses are connected with a different one of the reels. A plurality of valves on the mobile trailer are situated between the at least one manifold and a respective different one of the reels. A plurality of fluid level sensors are associated with a different one of the hoses, and a controller is configured to individually open and close the valves responsive to the fluid level sensors.

The present invention affords a method and apparatus for autonomous fueling/refueling of numerous machinery operating at work sites such as an active fracking site. The system of the present invention includes a main fuel tank mounted on a frame and a plurality of fuel intake lines individually coupled to the main fuel tank. Pumps are connected to at least some, but not necessarily all, of the fuel intake lines. The pumps are coupled to hoses extending from the main fuel tank to the saddle tanks requiring fueling/refueling. The present invention further includes a refueling cap that is detachably connected to the hoses and configured to mate with the saddle tanks. This cap includes a pressure valve configured to open only in the presence of sufficient pressure input pressure from the hose, which prevents siphoning of fuel out of the saddle tank, for example if a hose becomes ruptured somewhere along its length. The refueling cap further includes a vent coupled to a fluid flow sensing valve and an electrical pass-through for a pressure sensor. The pressure sensor is coupled to the refueling cap and intended to be disposed within a saddle tank to provide a signal indicative of the fuel level within the saddle tank. The pressure sensor is further electrically connected to a wireless transmitter. The wireless transmitter provides signals to a controller for the pumps. In one methodology of the present invention fueling/refueling of individual saddle tanks is initiated when a first signal is received from the wireless transmitter indicative of the saddle tank having been depleted to a first predetermined level and fueling/refueling is terminated when a another signal is received from the wireless transmitter indicative of the saddle tank having been filled to a second predetermined level or if a signal is received from the wireless transmitter indicative of the fluid flow sensor detecting fluid flow through the vent. In further accordance with the methodology of the present invention the controller records the duration of individual saddle tank fueling/refueling and the interval between fueling/refueling of the individual saddle tanks. A first alarm is generated by the controller if the duration of individual saddle tank fueling/refueling is longer than an average of fueling/refuelings for that individual saddle tank. A second alarm is generated by the controller if the interval between fueling/refueling for an individual saddle tank is longer than an average of the interval between fueling/refueling for that individual saddle tank.

The present invention affords a method and apparatus for autonomous fueling/refueling of numerous machinery operating at work sites such as an active fracking site. The system of the present invention includes a main fuel tank mounted on a frame and a plurality of fuel intake lines individually coupled to the main fuel tank. Pumps are connected to at least some, but not necessarily all, of the fuel intake lines. The pumps are coupled to hoses extending from the main fuel tank to the saddle tanks requiring fueling/refueling. The present invention further includes a refueling cap that is detachably connected to the hoses and configured to mate with the saddle tanks. This cap includes a pressure valve configured to open only in the presence of sufficient pressure input pressure from the hose, which prevents siphoning of fuel out of the saddle tank, for example if a hose becomes ruptured somewhere along its length. The refueling cap further includes a vent coupled to a fluid flow sensing valve and an electrical pass-through for a pressure sensor. The pressure sensor is coupled to the refueling cap and intended to be disposed within a saddle tank to provide a signal indicative of the fuel level within the saddle tank. The pressure sensor is further electrically connected to a wireless transmitter. The wireless transmitter provides signals to a controller for the pumps. In one methodology of the present invention fueling/refueling of individual saddle tanks is initiated when a first signal is received from the wireless transmitter indicative of the saddle tank having been depleted to a first predetermined level and fueling/refueling is terminated when a another signal is received from the wireless transmitter indicative of the saddle tank having been filled to a second predetermined level or if a signal is received from the wireless transmitter indicative of the fluid flow sensor detecting fluid flow through the vent. In further accordance with the methodology of the present invention the controller records the duration of individual saddle tank fueling/refueling and the interval between fueling/refueling of the individual saddle tanks. A first alarm is generated by the controller if the duration of individual saddle tank fueling/refueling is longer than an average of fueling/refuelings for that individual saddle tank. A second alarm is generated by the controller if the interval between fueling/refueling for an individual saddle tank is longer than an average of the interval between fueling/refueling for that individual saddle tank.