A rotary pump comprising a housing (1) defining an annular chamber with inlet and outlet ports (12;11) spaced apart around the chamber, a flexible annular diaphragm (3) forming one side of the chamber spaced opposite an annular wall of the housing (1), the diaphragm (3) being sealed at its edges to the housing (1), a partition (13) extending across the chamber from a location between the inlet and outlet ports (12;11) to the diaphragm (3). The diaphragm (3) is configured to be pressed progressively against the opposite wall of the housing (1) to force fluid drawn in at the inlet port (12) on one side of the partition (13) around the chamber and to expel it at the outlet port (11) at the other side of the partition (13). The outer face of the annular diaphragm (3) has a trough (40) at the part of the diaphragm (3) which faces the inlet port (12) and/or at the part of the diaphragm 3 which faces the outlet port (11).

A fuel pump includes a fuel pump housing with a pumping chamber and an inlet valve bore which extends along an inlet valve bore axis. The inlet valve bore is stepped such that the inlet valve bore includes a shoulder which is traverse to the inlet valve bore axis. A pumping plunger reciprocates within a plunger bore along a plunger bore axis such that an intake stroke of the pumping plunger increases volume of the pumping chamber and a compression stroke of the pumping plunger decreases volume of the pumping chamber. An inlet valve assembly includes a valve seat with a valve seat flow passage extending therethrough, the valve seat abuts the shoulder and is urged toward the shoulder by pressure within the pumping chamber during the compression stroke. The inlet valve assembly also includes a valve member which is moveable between an unseated position and a seated position.

The present disclosure describes various embodiments of adjustable implants, particularly permanent breast implants, intended for implantation into a subject, particularly a human subject. In some embodiments, the adjustable implant comprises a shell including a resilient shell membrane, a first reservoir containing a fluid, e.g., a saline, a second reservoir including a resilient second-reservoir membrane, and a pump. The pump may include a first pump actuator, a first pump inlet, and a first pump outlet. The first reservoir and second reservoir may be disposed within the shell and be in fluid communication via the pump. Fluid may be transferred between the two reservoirs to change the profile of the implant.

In an example, a fluid pump includes a shifter having a first end and pivotable about a second end, a cam rotatably engaged with the shifter, wherein the cam is to rotate about a cam shaft axis if the shifter pivots about the second end, a diaphragm fluidly engaged with a fluid cavity, a collar movable with a cam surface of the cam, wherein the collar is to compress the diaphragm so as to decrease the volume of the fluid cavity, a fluid inlet having a one-way inlet valve to only allow fluid into the fluid cavity, and a fluid outlet having a one-way outlet valve to only allow fluid out of the fluid cavity, wherein the one-way outlet valve is to allow fluid out of the fluid cavity upon the volume of the fluid cavity being decreased.

In an example, a fluid pump includes a shifter having a first end and pivotable about a second end, a cam rotatably engaged with the shifter, wherein the cam is to rotate about a cam shaft axis if the shifter pivots about the second end, a diaphragm fluidly engaged with a fluid cavity, a collar movable with a cam surface of the cam, wherein the collar is to compress the diaphragm so as to decrease the volume of the fluid cavity, a fluid inlet having a one-way inlet valve to only allow fluid into the fluid cavity, and a fluid outlet having a one-way outlet valve to only allow fluid out of the fluid cavity, wherein the one-way outlet valve is to allow fluid out of the fluid cavity upon the volume of the fluid cavity being decreased.

A high-pressure compressor and a system including a high-pressure compressor are described, wherein the high-pressure compressor includes at least one pressure container surrounding at least one media chamber and at least one compressor assembly. A diaphragm separates the at least one media chamber from at least one compressor chamber. The diaphragm extends along the at least one contour bar, which is connected to the at least one pressure container. The at least one contour bar is provided with at least one first connection and bores for supplying and/or discharging a gas or gas mixture. The diaphragm is fixed to the at least one contour bar by means of clamping pieces. The at least one pressure container has at least one second connection, which opens into the at least one media chamber and via which a medium can be introduced into and/or discharged from the at least one media chamber.

A high-pressure compressor and a system including a high-pressure compressor are described, wherein the high-pressure compressor includes at least one pressure container surrounding at least one media chamber and at least one compressor assembly. A diaphragm separates the at least one media chamber from at least one compressor chamber. The diaphragm extends along the at least one contour bar, which is connected to the at least one pressure container. The at least one contour bar is provided with at least one first connection and bores for supplying and/or discharging a gas or gas mixture. The diaphragm is fixed to the at least one contour bar by means of clamping pieces. The at least one pressure container has at least one second connection, which opens into the at least one media chamber and via which a medium can be introduced into and/or discharged from the at least one media chamber.

A high-pressure compressor and a system with a high-pressure compressor are described. In one example, the high-pressure compressor has a housing that surrounds at least one compressor chamber and a media chamber, wherein the compressor chamber and the media chamber are separated from one another in the housing via a diaphragm. The housing has at least one first connection, which opens into the media chamber and via which a medium can be introduced into and/or discharged from the media chamber. The housing has at least one second connection, which opens into the compressor chamber (330) and via which a gas or gas mixture can be introduced and/or discharged. The diaphragm is made of metal or a metal alloy and is deformable to compress a gas or gas mixture that can be introduced into the compressor chamber by introducing a medium into the media chamber.

A high-pressure compressor and a system with a high-pressure compressor are described. In one example, the high-pressure compressor has a housing that surrounds at least one compressor chamber and a media chamber, wherein the compressor chamber and the media chamber are separated from one another in the housing via a diaphragm. The housing has at least one first connection, which opens into the media chamber and via which a medium can be introduced into and/or discharged from the media chamber. The housing has at least one second connection, which opens into the compressor chamber (330) and via which a gas or gas mixture can be introduced and/or discharged. The diaphragm is made of metal or a metal alloy and is deformable to compress a gas or gas mixture that can be introduced into the compressor chamber by introducing a medium into the media chamber.

A metering diaphragm pump includes a metering chamber, a working chamber and a metering membrane. The metering chamber and the working chamber are separated from one another by the metering membrane. A device for moving the metering membrane back and forth between a first and a second position is provided. The volume of the metering chamber is smaller in a first position than in the second position, and a protective membrane is disposed next to the metering membrane on the working chamber side.