The present invention relates to improvements in the area of flexible impeller pumps. In particular, the present invention relates to flexible impellers with improved profiles(such as dual sealing lips), which are particularly well-suited to multiple cam pumps. A novel mounting hub configuration for mounting an impeller on a drive shaft is also provided. Pumps comprising such impellers and/or mounting hubs are provided, as are associated methods of installation and removal.

A rotary compressor including an attachment leg which is fixed to a bottom portion of a compressor housing and includes three locking holes which are locking holes to which three corresponding elastic supporting members, which support the compressor housing, are locked and which are disposed to be separated from each other in a circumferential direction on an outside in a radial direction of the compressor housing, in which, of the three locking holes, a distance of a first locking hole which is disposed closest to an accumulator from a housing center, is greater than a distance of each of the other two locking holes from the housing center.

The invention relates to a screw spindle pump, with a housing (2) which surrounds a delivery chamber (5), two spindles (7, 8), namely a drive spindle (7) and an opposed running spindle (8), a housing insert (6) which is arranged in the housing (2) and in which the spindles (7, 8) are accommodated, at least one bearing element (13, 13), which is connected to the housing insert (6) and on which bearings (12) of the spindles (7, 8) are arranged, and with at least one housing cover (14, 14), closing a housing opening. It is the object of the invention to provide a screw spindle pump at which maintenance and inspection work can be carried out more simply and cost-effectively. The invention achieves this object in that the bearing element (13, 13) together with the housing insert (6) and the spindles (7, 8) accommodated therein forms a unit (15) which, after the housing cover (14, 14) is taken off, is removable from the housing (2) through the housing opening.

A method and a device for fixing and synchronizing rotary pistons in a rotary piston pump involves introducing the rotary pistons into the pump space of the rotary piston pump. A shaft stub of each rotary piston is then pushed through a pump rear wall onto a driveshaft provided for the respective rotary piston. The rotary pistons are aligned and synchronized in the pump space via a template, the template being fixed detachably to a pump housing. The shaft stubs of the respective rotary piston are connected, after the synchronization, in each case via a clamping device in a friction-locked manner to the respective driveshaft, outside the pump space.

Exemplary embodiments are disclosed of compressor assemblies including lower covers having mounting feet skirts configured for increasing mounting feet stiffness and provide better resistance to crack formation due to vibration, e.g., in mobile and transport applications, etc. The mounting feet skirts may comprise full, rounded, and/or radiused skirts disposed along or around the entire end portions of the mounting feet near the mounting holes (e.g., bolt holes, etc.) in the mounting feet. Using full, rounded, and/or radiused skirts avoids or eliminates sharp corners, such as the sharp corner fillet features of conventional lower covers that are prone to having cracks form due to vibration while in transit.

An air tank system where the system's components may be mounted to the outer surface of the air tank is disclosed. The air tank may have a plurality of external rods orientated longitudinally along the outer surface of its body and connected to the end caps of the air tank for attaching mounting brackets to the external rods. The mounting brackets are configured for components, such as an air compressor or a manifold valve, to be mounted on them. The mounting bracket may have a first and second member, each slidable across the external rods independent from each other, configured to adjust to the different sizes of the components that are desired to be mounted on the air tank.

Exemplary embodiments are disclosed of compressor assemblies including lower covers having mounting feet skirts configured for increasing mounting feet stiffness and provide better resistance to crack formation due to vibration, e.g., in mobile and transport applications, etc. The mounting feet skirts may comprise full, rounded, and/or radiused skirts disposed along or around the entire end portions of the mounting feet near the mounting holes (e.g., bolt holes, etc.) in the mounting feet. Using full, rounded, and/or radiused skirts avoids or eliminates sharp corners, such as the sharp corner fillet features of conventional lower covers that are prone to having cracks form due to vibration while in transit.

A water pump assembly comprises an electric water pump, a suction-intake arm assembly, a discharge arm assembly, and a chassis configured to dampen vibrations generated by the electric water pump during operation. The electric water pump includes a pump motor, an inlet port, and an outlet port. The suction-intake arm assembly is connected to the inlet port, and the discharge arm assembly is connected to the outlet port. The chassis includes a baseboard and a yoke. The baseboard includes one or more vibration isolators on an underside thereof. The yoke includes a first opening configured to fit about a portion of the electric water pump, a second opening configured to support one end of the suction-intake arm assembly, and a third opening configured to support one end of the discharge arm assembly.

A fluid pump can include a tubular housing and multiple stator sections. Each of the stator sections has a helical stator profile formed therein. Deformation of the housing secures each respective stator section in the housing. A method of producing a fluid pump can include securing multiple stator sections to each other, each of the stator sections having a stator profile formed therein, and securing the stator sections in a tubular housing. The securing steps can be performed without any welding. The step of the securing the stator sections in the housing can include deforming the housing toward the stator sections.

A fluid pump can include a tubular housing and multiple stator sections. Each of the stator sections has a helical stator profile formed therein. Deformation of the housing secures each respective stator section in the housing. A method of producing a fluid pump can include securing multiple stator sections to each other, each of the stator sections having a stator profile formed therein, and securing the stator sections in a tubular housing. The securing steps can be performed without any welding. The step of the securing the stator sections in the housing can include deforming the housing toward the stator sections.