| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 417338000 | Relatively movable pumping members driven by relatively movable working members | 9 |
| 20090104052 | PUMP IMPROVEMENTS - A pump that has a flangeless valve plate, meaning that the valve plate has no flange through which bolts that secure the head to the pump extend. The pump has eccentrics and pistons that all have holes in them so that the pistons at opposite ends of the pump can be assembled to the shaft of the motor 180° out of phase. The pump further has a monolithic head that includes the two head members of the pump and the tube that connects them also has an integrally formed port. The pump is supported by elastomeric tubular members from its ports. The pump has a push-in fitting that can be pushed into a hole in a member such as the head, the housing or the base so that once pushed in, a ring around the fitting expands outwardly behind an edge of the body to trap the fitting in the opening. | 04-23-2009 |
| 20090123305 | Detachable Connecting Rod Compressor Having the Same - A detachable connecting rod includes a first member ( | 05-14-2009 |
| 20110070106 | AIR COMPRESSOR STRUCTURE - An air compressor structure includes a main body, a fixing plate and a cap member. The main body includes a pair of cylinders each having a fixture thereon. The fixture has a pair of first threaded holes. The fixing plate has a pair of second threaded holes corresponding to the first threaded holes. The cap member has a pair of third threaded holes corresponding to the first and second threaded holes. Fasteners are inserted through the first, second and third threaded holes to secure the main body, the fixing plate and the cap member together so as to minimize vibration when the compressor is working and to prevent the compressor from leakage through an air passage and a chamber. | 03-24-2011 |
| 20120087810 | MULTI-STAGE CENTRIFUGAL COMPRESSORS - The invention relates to an improved multi-stage centrifugal compressor ( | 04-12-2012 |
| 20120164004 | Pump Assembly - A pump has power and fluid ends wherein one or more of the drive rods are offset from the plungers. An offset coupler connects a drive rod to an offset plunger. A method includes connecting the offset power end to the standard fluid end using the offset coupler. A repair and maintenance system includes inventories of standard fluid ends, power ends including offset power ends, and adapters, and a population of in service pumps, whereby the pumps can be repaired by removing and replacing the power ends from inventory using the adaptor where the replacement power end unit is offset. Another method includes removing and replacing the power end with one from the inventory, wherein the adapter is used in the case of an offset power end, whereby the offset and standard power ends may be used interchangeably. | 06-28-2012 |
| 20140086761 | COUNTER-ROTATING AXIAL-FLOW FAN DEVICE - A counter-rotating axial-flow fan device, which requires low power consumption and has an improved flow rate-static pressure characteristic, is provided at low cost. The counter-rotating axial-flow fan device includes a first axial-flow fan unit with first blades and a second axial-flow fan unit with second blades, which are connected in series. The first axial-flow fan unit includes a three-phase motor for rotating the first blades. The second axial-flow fan unit includes a single-phase motor for rotating the second blades. The first blades and the second blades rotate in a direction opposite to each other. In addition, the three-phase motor is driven by controlling the rotation speed thereof. | 03-27-2014 |
| 417339000 | Nonrotary pumping and fluid motor working members | 3 |
| 20110256001 | Reciprocating Compressor - A reciprocating compressor provided with a piston, which is compact and having high sealing performance is provided. A reciprocating compressor includes: a low-pressure compressor unit having a low-pressure piston and a low-pressure cylinder for compressing air with the low-pressure piston reciprocating while oscillating within the low-pressure cylinder; a high-pressure compressor unit having a high-pressure piston and a high-pressure cylinder for further compressing the air compressed in the low-pressure compressor unit with the high-pressure piston reciprocating while oscillating within the high-pressure cylinder; and a motor for driving the low-pressure compressor unit and the high-pressure compressor unit. A maximum tilt angle during oscillation of the low-pressure piston is made larger than a maximum tilt angle during oscillation of the high-pressure piston. | 10-20-2011 |
| 417340000 | Common expansible chamber for oppositely movable working members | 2 |
| 20140099216 | FREE PISTON TYPE TORSION DRIVE COMPRESSOR - The invention relates to a free piston type compressor | 04-10-2014 |
| 417341000 | Mechanically interconnected | 1 |
| 20150078932 | DRIVE MECHANISM FOR ROTARY COMPRESSORS OR PUMPS - Drive mechanism for rotary compressor or pump that consists of a casing ( | 03-19-2015 |
