33results about How to "Destroy surface tension" patented technology

A capping device for capping a print head of a printer includes a cap for capping the print head, a supporting structure for mechanically engaging and disengaging the cap with the print head, and an elastic structure installed inside the cap. The top of the cap is lower than the top of the elastic structure. Before the supporting structure engages the cap with the print head, the top of the elastic structure bends outward and contacts the print head in an incomplete sealed manner.

In a covered wastewater reservoir, a gas passage is defined under the membrane cover and along the sides of the reservoir. An accumulation of bio-gases is held captive between the membrane cover and the liquid surface in a central region of the reservoir relative to the gas passage, by a flap-valve attachment condition extending between the accumulation of bio-gases and the gas passage. The new method for breaking this flap-valve attachment condition and for allowing bio-gases to flow from the accumulation of bio-gases toward the gas passage, consists of periodically and momentarily increasing a pressure in the gas passage to equal or to slightly exceed a pressure in the accumulation of bio-gases. In another aspect, the membrane cover is provided with a stiff and rough-surfaced bottom layer to facilitate the breaking of flap-valve attachment conditions when the pressure under the cover is made equal everywhere.

A method for performing balloon catheterization of a zone of attention is provided. An intravascular device has an expandable portion secured to a distal end of a catheter tube. The expandable portion has a number of struts, at least one having an incising element extending perpendicular therefrom. The intravascular device is placed within a person's vascular system and moved to the zone of attention where the expandable portion is expanded and manipulated along the zone of attention to score the atherosclerotic material located in the blood vessel. Subsequently, a balloon catheter device is moved to the zone of attention and inflated to compress or fragment the scored atherosclerotic material.

The invention provides a high-low fin reinforced condensation heat exchange tube. The high-low fin reinforced condensation heat exchange tube comprises a tube body and first-stage outer fins in a spiral state, wherein the first-stage outer fins are of an integral structure and are in a spiral state, spaces between adjacent first-stage spiral outer fins form channel structures communicating with each other, and sharp secondary spiral outer fins are arranged at the bottoms of the channels; first grooves which are staggered with the channels and communicate with the channels are formed in the topof the first-stage spiral outer fins to form a fin tip structure with uneven height; and second grooves which are staggered with the channels and communicate with the channels are formed in the secondary spiral outer fins; and meanwhile, the inner surface of the tube body is provided with inner threaded ribs which extend spirally in the axial direction. The high-low fin reinforced condensation heat exchange tube has the advantages that the heat exchange surface area inside and outside the tube can be increased, a liquid film can be thinned by the high and low fin structure outside the tube, the liquid discharging speed of refrigerants on the surface of the fins is increased, the heat exchange effect of a condensation tube is improved, the internal thread rib structure in the tube is beneficial to improving the flowing state of fluid in the tube, and thus the effect of heat exchange between inside and outside of a reinforcing tube is achieved.

A chip for analyzing fluid being moved without an outside power source includes: a pre-treatment portion into which fluid of a target-being analyzed substance is injected and mixed with an identification substance; a channel portion in which a specific reaction of the fluid such as an antigen-antibody reaction is conducted; and a washing portion into which the fluid is received. The pre-treatment portion includes: a specimen injection portion into which the fluid is injected; a first buffer portion protruding upwardly with respect to the specimen injection portion connected thereto to have a height greater than that of the specimen injection portion relative to the channel portion, such that the fluid is firstly received in the first buffer portion; and at least one specimen leading guide which destroys surface tension of the fluid flow moving from the specimen injection portion to the first buffer portion.