Quotables
"The abolishment of pain in surgery is a chimera. It is absurd to go on seeking it...knife and pain are two words in surgery that must forever be associated in the consciousness of the patient."
Dr. Alfred Velpeau, French surgeon ; 1839
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7410348 | Multi-speed compressor/pump apparatus A pumping/compressing apparatus for use in a fluid handling system transferring a fluid from one location, e.g., a tank, to another location or to an end use is provided. The apparatus basically includes a motor and a multistage, e.g., two stage, device including at... | 08/12/2008 |
| 7168924 | Rod pump control system including parameter estimator A rod pump control system includes a parameter estimator that determines from motor data parameters relating to operation of the rod pump and/or downhole dynamometer card without the need for external instrumentation, such as down hole sensors, rod load sensors, flo... | 01/30/2007 |
| 6659741 | Travelling valve assembly for a fluid pump A travelling valve assembly for use in a sucker rod activated fluid pump includes: a flow through body member having at least one rounded groove formed in the lower end of a central passageway of the flow through body member; and a downwardly depending me... | 12/09/2003 |
| 6071096 | Pneumatic cylinder, in particular for actuating fume extraction valves in fume and heat extraction plants A pneumatic cylinder for actuating fume extraction valves in fume and heat extraction plants has a piston (2) that may be actuated from both sides with at least one working surface and that can be made to slide by pressurised air in a cylinder (1) with at... | 06/06/2000 |
| 5634780 | Hand pump of a drinking device for pumping water to a diver A drinking device for a diver includes a water container and a hand pump for pumping water to the diver's mouth. The hand pump includes a piston rod slidably engaged in a housing and two discs secured to the piston rod for separating the housing into an u... | 06/03/1997 |
| 4239458 | Oil well unloading apparatus and process An internal bypass free piston provides for continuous flow of gas during upward and downward travel of the piston; the piston is structured to rotate during downward travel to equalize wear and the frictional force between wall and piston is utilized to ... | 12/16/1980 |
