The invention relates to a reciprocating pump (1) comprising a roller tappet (2) and a pump plunger (10) that is operatively connected to the roller tappet (2). The roller tappet (2) has a roller support (3), a roller (4) and a pin (5). A first bearing eye (6) and a second bearing eye (7) are formed in the roller support (3), the pin (5) being supported in the first bearing eye (6) and in the second bearing eye (7). The roller (4) is rotatably mounted on the pin (5). The pin (5) is mounted more resiliently in the first bearing eye (6) than in the second bearing eye (7).

The invention relates to a reciprocating pump (1) comprising a roller tappet (2) and a pump plunger (10) that is operatively connected to the roller tappet (2). The roller tappet (2) has a roller support (3), a roller (4) and a pin (5). A first bearing eye (6) and a second bearing eye (7) are formed in the roller support (3), the pin (5) being supported in the first bearing eye (6) and in the second bearing eye (7). The roller (4) is rotatably mounted on the pin (5). The pin (5) is mounted more resiliently in the first bearing eye (6) than in the second bearing eye (7).

In certain examples, a printing system comprises: a depositing system to deposit printing fluid on a print medium; a reservoir; and a displacement pump to move printing fluid to the depositing system from the reservoir. The displacement pump comprises: a pump body defining a chamber, an inlet to fluidly connect the chamber to the reservoir, and an outlet to fluidly connect the chamber to the depositing system; and a displacement member movable relative to the pump body; the displacement member having an outer surface and comprising a cavity located in a portion of the outer surface disposed in the chamber. In use, the displacement member is movable to close the inlet and to force printing fluid in the chamber through the outlet to the depositing system.

In certain examples, a printing system comprises: a depositing system to deposit printing fluid on a print medium; a reservoir; and a displacement pump to move printing fluid to the depositing system from the reservoir. The displacement pump comprises: a pump body defining a chamber, an inlet to fluidly connect the chamber to the reservoir, and an outlet to fluidly connect the chamber to the depositing system; and a displacement member movable relative to the pump body; the displacement member having an outer surface and comprising a cavity located in a portion of the outer surface disposed in the chamber. In use, the displacement member is movable to close the inlet and to force printing fluid in the chamber through the outlet to the depositing system.

A thermo-electric cooler pump system includes a liquid pump. The liquid pump comprises an integrated chiller and a heater. The thermo-electric cooler pump system includes a case component. The case component seals a liquid with the thermo-electric cooler pump system so that the liquid does not enter the thermo-electric cooler pump system except by an inlet port and escape the thermo-electric cooler pump system except by an exit port. The system includes a motor component. The motor component is situated outside of the case component. The motor component is not wetted by the liquid. The shaft of the motor component enters the case through a sealed hole. The system includes an impeller component. The impeller component is contained within the case component, wherein the impeller is wetted by the liquid. The impeller component is attached to the shaft such that the motion of motor component is transferred to the impeller component causing it to move. The motion of impeller component causes the liquid to enter the inlet port and flow toward the exit port. The system includes a chiller/heater component.

A heat insulating vessel including an inner tank having a vertical axis to accommodate low temperature liquefied gas, an outer tank externally around the inner, and a low temperature liquefied gas pump disposed inside the inner tank. The outer tank having an upper part and an outer tank body. A lid structure having a heat-insulated structure detachably fitted into an upper part of the inner. The heat insulating vessel includes a first fastener to fasten with bolts, a first flange to upper ends of the inner and outer tanks upper part to a second flange to an outer circumferential part of the lid structure, and a second fastener to fasten with bolts, a third flange to an upper end of the outer tank body to a fourth flange to a lower end of the outer tank upper part. A vacuum insulating layer is formed between the inner and outer tanks.

A heat insulating vessel including an inner tank having a vertical axis to accommodate low temperature liquefied gas, an outer tank externally around the inner, and a low temperature liquefied gas pump disposed inside the inner tank. The outer tank having an upper part and an outer tank body. A lid structure having a heat-insulated structure detachably fitted into an upper part of the inner. The heat insulating vessel includes a first fastener to fasten with bolts, a first flange to upper ends of the inner and outer tanks upper part to a second flange to an outer circumferential part of the lid structure, and a second fastener to fasten with bolts, a third flange to an upper end of the outer tank body to a fourth flange to a lower end of the outer tank upper part. A vacuum insulating layer is formed between the inner and outer tanks.

An indoor gardening appliance includes a grow module that is rotatably mounted within a grow chamber and that defines pod apertures for receiving a plurality of plant pods. A hydration system includes a nozzle assembly for selectively discharging a nutrient mixture from a mixing tank to hydrate plants within the grow chamber. The nozzle assembly includes a hydraulic cylinder including a piston positioned within a cylindrical chamber. An actuator moves the piston to a fully retracted position to draw in enough nutrient mixture for a single hydration cycle and then moves to a fully extended position to discharge the nutrient mixture. An intake check valve prevents undesirable backflow into the mixing tank and a discharge check valve prevents undesirable backflow into the cylindrical chamber.

An indoor gardening appliance includes a grow module that is rotatably mounted within a grow chamber and that defines pod apertures for receiving a plurality of plant pods. A hydration system includes a nozzle assembly for selectively discharging a nutrient mixture from a mixing tank to hydrate plants within the grow chamber. The nozzle assembly includes a hydraulic cylinder including a piston positioned within a cylindrical chamber. An actuator moves the piston to a fully retracted position to draw in enough nutrient mixture for a single hydration cycle and then moves to a fully extended position to discharge the nutrient mixture. An intake check valve prevents undesirable backflow into the mixing tank and a discharge check valve prevents undesirable backflow into the cylindrical chamber.

A valvular conduit, preferably a Tesla valvular conduit, in which a plug member is coaxially received within a bore in a sleeve member and in which passageways are defined between the plug member and the sleeve member within interior walls configured to permit mixing of fluid flowing through the passageways in at least one direction, preferably, the relatively free passage of fluid through the passageways upstream but increased the resistance to downstream flow of the fluid through each passageway.