The present disclosure relates to a resistant steel composition comprising a nickel content from about 3% MB to about 4% MB; a manganese content from about 0.5% MB to about 1.5% MB; a chromium content from about 12% MB to about 13.4% MB; a molybdenum content from about 0.3% MB to about 0.7% MB; and a copper content of less than about 0.40% MB. In some embodiments, the present disclosure relates to a process for generating a resistant steel composition, the process comprising melting one or more resistant steel components together to form a melted steel; refining the melted steel to form a refined steel; and purifying the refined steel to form the resistant steel composition.

A pump comprising a bore pump fluid end having a reciprocating element bore, a discharge valve assembly comprising a discharge valve seat and a discharge valve body, and a suction valve assembly comprising a suction valve seat and a suction valve body; a hollow, cylindrical reciprocating element; a hollow reciprocating element adapter comprising a first end having a fluid inlet opposite a second end having a fluid outlet, wherein the second end of the reciprocating element adapter is connected to and in fluid communication with the fluid intake end of the reciprocating element; a pump power end having a push rod connected to the first end of the reciprocating element adapter; and a movable manifold comprising a reciprocating element end and a fluid intake end, wherein the reciprocating element end of the movable manifold is connected to and in fluid communication with the fluid inlet of the reciprocating element adapter.

The disclosure herein generally relates to sealing elements for valves and methods for forming the same. A valve component has a body which includes a guide portion, a stem, and a sealing portion between the guide portion and the stem. The sealing portion has a front surface facing the guide portion, a back surface facing the stem, and a recess for a sealing element formed in a periphery of the sealing portion; and one or more passages extending between the back surface of the sealing portion and the recess.

The disclosure herein generally relates to sealing elements for valves and methods for forming the same. A valve component has a body which includes a guide portion, a stem, and a sealing portion between the guide portion and the stem. The sealing portion has a front surface facing the guide portion, a back surface facing the stem, and a recess for a sealing element formed in a periphery of the sealing portion; and one or more passages extending between the back surface of the sealing portion and the recess.

The present invention provides an improved pump assembly incorporating a liquid pump and an air pump and which pump includes a flexible annular diaphragm member coaxially about a piston-forming element forming a component with the liquid pump.

This cryogenic pump comprises: a pump body (2) inside which is a piston (26) mounted so as to be mobile in translation along an axis (24) referred to as the longitudinal axis and bounding a pumping chamber (31), means for supplying liquid to the pumping chamber (31) and means for discharging pressurized liquid from the pumping chamber (31), comprising a discharge valve (40) mounted in a discharge valve body (18) mounted on the longitudinal axis (24), the supply means comprising a supply valve (42) arranged at the periphery of the discharge valve body (18).

A bicycle pump includes a pump body assembly, a handle assembly, a flexible hose assembly, and/or a magnet. The pump body assembly may include an outer tube, which defines an air chamber, and a head assembly with an air outlet opening. The handle assembly may slidably be associated with the body assembly, and include an inner tube and a piston, slidable inside the outer tube. The flexible hose assembly may be suitable to be stored inside the inner tube when the pump is not in use, and suitable to be connected to the air outlet opening during pumping. The magnet may connect the flexible hose assembly to the air outlet opening of the head assembly in a removable manner.

A check valve which allows liquid to flow in one direction while preventing liquid from flowing in a direction reverse to said one direction, the check valve comprising: an inflow port allowing liquid to flow therein; an outflow port allowing liquid to flow out thereof; a valve seat provided between the inflow port and the outflow port, the valve seat having a valve hole through which the inflow port communicates with the outflow port; a valve chamber provided between the valve seat and the outflow port; a valve element disposed in the valve chamber, the valve element opening and closing the valve hole; a plurality of holding surfaces located radially outside the valve element, the holding surfaces extending in an axial direction; and an elastic member supported on the holding surfaces and set in the valve chamber, the elastic member applying an elastic force directed toward the valve hole to the valve element.

A bicycle pump includes a pump body assembly, a handle assembly, a flexible hose assembly, and/or a magnet. The pump body assembly may include an outer tube, which defines an air chamber, and a head assembly with an air outlet opening. The handle assembly may slidably be associated with the body assembly, and include an inner tube and a piston, slidable inside the outer tube. The flexible hose assembly may be suitable to be stored inside the inner tube when the pump is not in use, and suitable to be connected to the air outlet opening during pumping. The magnet may connect the flexible hose assembly to the air outlet opening of the head assembly in a removable manner.

A valve includes a first plate, a side wall plate, a second plate, and a third plate. The first plate has a plurality of first vent holes. The second plate constitutes a valve chamber along with the first plate and the side wall plate. The second plate includes a second principal surface opposing a first principal surface of the first plate. The second plate has a plurality of second vent holes. The third plate has a plurality of third vent holes. The plurality of third vent holes overlaps with the plurality of first vent holes without overlapping with the plurality of second vent holes in a plan view in a direction in which the first plate and the second plate oppose each other. Both principal surfaces of the third plate oppose the first principal surface and the second principal surface. The third plate is disposed in the valve chamber.