http://www.freshpatents.com/Rotary-expansible-chamber-devices-dtnewntc418.php USPTO Class 418 - Rotary expansible chamber devices en-us Mon, 20 May 2013 13:41:01 -0700 1000 Wednesday Thursday Friday Saturday Sunday 141 31 http://www.freshpatents.com/index.php?rss=true http://www.freshpatents.com/images/freshpatentsnav_rss.gif http://www.freshpatents.com/-dt20130516ptan20130121863.php Mon, 20 May 2013 13:41:01 -0700 An adjustable rotary vane pump configured to reduce pressure pulsations during hydraulic fluid discharge includes a housing having two side plates positioned in parallel. Each side plate has multiple grooves formed in its surface. A rotor mounted between the side plates has multiple vanes extending radially outward. A lift ring... http://www.freshpatents.com/-dt20130516ptan20130121864.php Mon, 20 May 2013 13:41:01 -0700 A scroll compressor is provided. The scroll compressor may include a back pressure chamber formed between a wrap portion and a base portion of an orbiting scroll. A center of the back pressure chamber may be eccentric from a geometric center of the orbiting scroll along a line where a... http://www.freshpatents.com/-dt20130516ptan20130121865.php Mon, 20 May 2013 13:41:01 -0700 A scroll compressor is provided. The scroll compressor may include a communication hole formed in a fixed scroll for communicating a discharge space and a thrust bearing surface with each other. This may reduce frictional loss between the fixed scroll and an orbiting scroll. Further, if a high vacuum state... http://www.freshpatents.com/-dt20130516ptan20130121866.php Mon, 20 May 2013 13:41:01 -0700 A scroll compressor is provided. The scroll compressor may include guide holes formed at one of a wrap portion or a base portion, and guide pins inserted into the guide holes formed at the other of the wrap portion or the base portion to couple the wrap portion and the... http://www.freshpatents.com/-dt20130516ptan20130121867.php Mon, 20 May 2013 13:41:01 -0700 A rotary pump with an improved seal on a control pressure chamber, including: a housing having a delivery chamber; a feed wheel rotatable in the delivery chamber; an actuating member surrounding the feed wheel forming delivery cells and moveable in the housing relative to the feed wheel. The control pressure...