The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 20, 1988
Filed:
Jun. 22, 1987
Kenji Okayasu, Mukai-machi, Gyouda-shi, Saitama, JP;
Other;
Abstract
A heat-driven pump for performing the transport of liquid by the function of bubbles produced by vaporization and condensation of the liquid under heating includes an inlet pipe, an inlet-side check valve, a charging pipe, a bubble forming portion, a discharging pipe, an outlet-side check valve, and an outlet pipe. The bubbles forming portion includes a heating portion for receiving heat supplied from outside, a liquid cavity formed in the heating portion having a cross-sectrion which is reduced along the longitudinal axis of the heating portion, and a vapor-liquid exchange chamber communicated with the liquid cavity and having a volume greater than the volume of a bubble extruded from the liquid cavity. In this heat-driven pump, a bubble is generated and expanded in the liquid cavity by heat received by the heating portion, a discharge of liquid is carried out by the expansion of the bubble, an introduction of new liquid into the liquid cavity is carried out by extrusion of the bubble into the vapor-liquid exchange chamber, and elimination of the bubble is carried out by a cooling of the heating portion, and accordingly, a successive pumping of liquid is carried out.