newTOP 200 Companies
filing patents this week

    Free Services  

  • Enter keywords & we'll notify you when a new patent matches your request (weekly update).

  • Save & organize patents so you can view them later.

  • View the last few months of your Keyword emails.

  • Patents sorted by company.

Follow us on Twitter
twitter icon@FreshPatents

Browse patents:
Next →
← Previous


Title: Pump.
Abstract: A double action rotary pump forcibly delivers fluid such as liquid or gas. A transmission unit operates at uniform or non-uniform angular speeds using driving force transmitted from a motor via a power transmission system. An operating unit is provided in series with the transmission unit. A piston of the operating unit has a pair of heads, which rotate at non-uniform angular speeds in a counteracting fashion while maintaining the distance between shafts, and divides the spaces inside cylinders. The volumes of the divided spaces of the cylinders are repeatedly and alternately contracted and expanded in response to the rotation of the piston, so that the cylinders counteractively and continuously perform intake and exhaust operations, thereby forcibly delivering fluid. The structure of the power transmission system is improved such that the sum of flow rates that are pumped by the piston at a predetermined time point stays uniform. ...
USPTO Applicaton #: #20130028779
Inventors: Phil Chan Rha

The Patent Description & Claims data below is from USPTO Patent Application 20130028779, Pump.

← Previous       Next → Advertise on - Rates & Info

You can also Monitor Keywords and Search for tracking patents relating to this Pump patent application.
monitor keywords

Keyword Monitor How KEYWORD MONITOR works... a FREE service from FreshPatents
1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored.
3. Each week you receive an email with patent applications related to your keywords.  
Start now! - Receive info on patent apps like Pump or other areas of interest.

Previous Patent Application:
Stator of a gerotor device and a method for manufacturing roller pockets in a stator of a gerotor device
Next Patent Application:
Iron-based sintered powder metal for wear resistant applications
Industry Class:
Rotary expansible chamber devices
Thank you for viewing the Pump patent info.
- - -

Results in 0.03035 seconds

Other interesting categories:
Software:  Finance AI Databases Development Document Navigation Error


Data source: patent applications published in the public domain by the United States Patent and Trademark Office (USPTO). Information published here is for research/educational purposes only. FreshPatents is not affiliated with the USPTO, assignee companies, inventors, law firms or other assignees. Patent applications, documents and images may contain trademarks of the respective companies/authors. FreshPatents is not responsible for the accuracy, validity or otherwise contents of these public document patent application filings. When possible a complete PDF is provided, however, in some cases the presented document/images is an abstract or sampling of the full patent application for display purposes. Terms/Support
Next →
← Previous

stats Patent Info
Application #
US 20130028779 A1
Publish Date
Document #
File Date
Other USPTO Classes
International Class

Your Message Here(14K)


Follow us on Twitter
twitter icon@FreshPatents

Rotary Expansible Chamber Devices   Interengaging Rotating Members   Eccentrically Mounted  

Browse patents:
Next →
← Previous