72results about How to "Overcome buoyancy" patented technology

An automatic stop valve formed in a container of a medical fluid administration system includes an electrical field that attracts the float and valve seat together to shut off flow from the exit port of the container when the fluid within the container is reduced to a predetermined level. One or both of the float and valve seat creates an electric field that attracts the other, which is made of a non-magnetic dielectric, into engagement. In one embodiment, the valve seat is formed of an electret that creates the electric field attracting the float to it to stop flow. In another embodiment, the float comprises an electret that attracts the float to the dielectric valve seat. In yet another embodiment, both the float and valve seat include electrets of opposite polarity that attract each other into engagement. The lack of magnetic and metallic materials makes the shut off valve suitable for use in an MRI environment.

A flexible tubing for fine bubble aeration is provided with an air passageway defined in part by an upper portion and a lower portion. The tubing can be made of a uniform weighted material with more material in the lower portion than in the upper portion. This makes the tubing self-orienting, in that it will tend to orient itself with micro-slits along the upper portion facing upward and the lower portion facing downward when submerged in a body of water. An automated, one-stage production line converts raw tubing material to a finished tubing product without the need for separate processing. A method of coiling the tubing places the micro-slits approximately 90° away from the surface of a spool hub, thereby avoiding a longitudinal arch in the tubing and ultimately preventing roll-over and improper slit orientation after installation in a water body.

The invention relates to a steel net cage filling body and a manufacturing method thereof, and belongs to the field of common building structures. The filling body (1) comprises an upper component (2), a lower component (3), internal supporting pieces (4) and edge reinforcing pieces (5). The upper component and the lower component are each made of strip-shaped high-ribbed formworks (6) with the steel plate thickness smaller than 0.5 mm, each high-ribbed formwork is provided with two bending lines (7) which divide the high-ribbed formwork into a face plate (8) and two side plates (9), and the two ends of each high-ribbed formwork are bent by 90 degrees correspondingly along the bending lines towards the same direction, so that the U-shaped upper component (2) with three faces and two edges and the lower component (3) with three faces and two edges are formed correspondingly; at least one internal supporting piece (4) is mounted in the upper component and the lower component, and the filling body (1) is formed by oppositely buckling the upper component and the lower component. The steel net cage filling body has high economical performance and applicability and promotes the development of building technologies.

The invention discloses a method for manufacturing bubble type water-saving devices. The method includes steps of S1, connecting plastic hoses onto household faucets and enabling the plastic hoses toperpendicularly face downwardly; S2, inserting syringe needles into the plastic hoses from the side surfaces of the plastic hoses towards the oblique downward directions, separating needle points of the syringe needles from ports at the tail ends of the plastic hoses by the distances of 5-7 times the inner diameters of the plastic hoses under the control and keeping slopes of cutting edges at theneedle points facing downwardly; S3, clamping first clips at certain positions on the plastic hoses, forming narrow pipelines, and accelerating water flow to allow water to apply pressures lower than0.1 MPa to the pipe walls of the narrow pipelines; S4, clamping second clips at the tail ends of the plastic hoses to form convergence cone section pipelines at the tail ends of the plastic hoses, andforming atomized water by air and the water in air and water mixing cavities between the narrow pipelines and the convergence cone section pipelines. The certain positions on the plastic hoses correspond to the needle points. The method has the advantages of simplicity and convenience in manufacturing, low cost and applicability to diversified cleaning scenes.