Class / Patent application number | Description | Number of patent applications / Date published |
418550100 |
Helical working member, e.g., scroll
| 512 |
418058000 |
Plural working members or chambers
| 98 |
418063000 |
With relatively movable partition member
| 32 |
418057000 |
Adjustable or resiliently biased working member | 2 |
20090098001 | SEALING TABS ON ORBITING SCROLL - An improved sealing mechanism for a positive fluid displacement apparatus, where sealing tabs are located on the orbiting scroll. The sealing tabs can be integrally formed with the orbiting scroll or disposed on a piston that is mounted on the orbiting scroll. | 04-16-2009 |
20150093277 | Submersible Pump Assembly For Use In A Borehole - A submersible pump assembly for use in a borehole, including a screw pump and/or an eccentric screw pump with a longitudinal axis. The submersible assembly further includes a drive and a bearing arrangement for taking up and diverting the axial and/or radial forces arising during the operation of the screw pump andor eccentric screw pump. The drive is disposed, via a first coupling rod, at one end of the screw pump and/or eccentric screw pump and the bearing arrangement is assigned, via a second coupling rod, to the opposite end of the screw pump and/or eccentric screw pump along the longitudinal axis. | 04-02-2015 |
418056000 |
Non-metallic working member, cylinder or partition | 1 |
20140286808 | Eccentric Screw Machine - An eccentric screw machine ( | 09-25-2014 |
Entries |
Document | Title | Date |
20090148325 | ROTARY TYPE COMPRESSOR - A valve guard for restricting the amount of deformation of a valve disc has a main body part abuttable with the back surface of the valve disc, and a fixation part extending to outside of a receding part. Upon mounting the valve guard to an end plate part, the fixation part is firmly attached to the outside of the receding part of the end plate part. | 06-11-2009 |
20090155112 | VARIABLE CAPACITY ROTARY COMPRESSOR - A variable capacity rotary compressor is provided, in which a vane may be restricted by a pressure difference generated between both side surfaces of the vane when the compressor performs in a saving driving mode. The vane may be restricted quickly and stably by rapidly decreasing a pressure of a vane chamber by leaking a discharge pressure of the vane chamber to an inlet via a low pressure passage and thereby increasing a pressurizing force applied to a side surface of the vane relatively greater than a supporting force applied to a rear surface thereof. In this way, the vane may be prevented from being vibrated due to a weak restriction force of the vane when a power driving mode of the compressor is switched into the saving driving mode, which prevents noise from increasing due to design conditions, thereby enhancing a comfort feeling of a user. | 06-18-2009 |
20100209276 | INTERNAL GEAR PUMP ROTOR, AND INTERNAL GEAR PUMP USING THE ROTOR - Flexibility is given in setting the tooth depth and the number of teeth of a pump rotor including a combination of an inner rotor and an outer rotor whose numbers of teeth are different by one, and the discharge amount of the pump is increased by the increase of the tooth depth. At least one of an addendum curve and a dedendum curve of an inner rotor ( | 08-19-2010 |
20130089447 | PLANETARY ROTARY TYPE FLUID MOTOR OR ENGINE AND COMPRESSOR OR PUMP - A planetary rotary type rotation device comprises a stator, a rotor, and a center sun wheel drum ( | 04-11-2013 |
20130183181 | ROTARY COMPRESSOR - A rotary compressor capable of reducing a maximum load applied to a rotary shaft, the rotary compressor including a casing, a cylinder installed at an inside the casing and configured to provide a space to compress gas, a rotary shaft disposed while passing through the cylinder, a roller configured to compress gas by rotating along an inner circumferential surface of the cylinder, and an eccentric cam integrally formed with the rotary shaft and disposed at an inside the roller, wherein the eccentric cam is disposed at an eccentric position side in a shaft direction on an axial line of the rotary shaft. | 07-18-2013 |
20130336829 | ROTARY PISTON MACHINE, ESPECIALLY ROTARY ENGINE - A rotary piston machine is disclosed. In one aspect, the machine includes a piston chamber that is defined in a housing by a first sidewall, a second sidewall and a peripheral wall interconnecting these sidewalls and a rotary piston that is rotatably arranged in the piston chamber and has a first face and a second face. The first face of the rotary piston faces an interior of the first sidewall of the piston chamber and the second face of the rotary piston faces an interior of the second sidewall of the piston chamber at least one ventilation bore is provided in the first and/or the second sidewall of the piston chamber and connected to at least one ventilation channel, wherein the at least one ventilation bore is arranged at a location that radially lies within at least one first lateral seal. | 12-19-2013 |
20140234147 | COMPRESSOR - A rotary compressor includes a drive mechanism having a drive shaft with an eccentric part, and a compression mechanism. The compression mechanism includes a tubular cylinder covering an outer periphery of the eccentric part, a piston arranged inside the cylinder and fitted onto the eccentric part, an upper end plate closing an upper end of the cylinder, and a lower end plate closing a lower end of the cylinder. A lower end surface of the eccentric part defines a thrust bearing surface slidably contacting an upper end surface of the lower end plate. The drive shaft has an oil path with lubrication oil circulating through the oil path. The eccentric part has a circumferentially extending pressure reduction groove opening at part of the thrust bearing surface close to an inner circumferential side to reduce a pressure of the lubrication oil supplied from the oil path to the pressure reduction groove. | 08-21-2014 |
20150139843 | Internal Gear Pump - An internal gear pump with a field replaceable idler is disclosed that may be used for sanitary applications. Access to the idler mainly merely requires removal of the head. Access to the seal assembly disposed at the inboard end of the pump chamber is also fast and easy as removal of the head exposes a fastener that secures the rotor to the drive shaft. Removal of this fastener enables the rotor to be removed with a standard rotor-pulling tool thereby exposing the pump chamber seal assembly, which may be cleaned, serviced or replaced as needed. | 05-21-2015 |