초록 ▼

A liquid storage tank for providing a liquid under pressure in such a way that pressurized air will not be absorbed by the liquid is disclosed. According to one embodiment of this invention, the pressurized storage tank of this invention having side walls and an end wall uses a plunger or a plate ha

A liquid storage tank for providing a liquid under pressure in such a way that pressurized air will not be absorbed by the liquid is disclosed. According to one embodiment of this invention, the pressurized storage tank of this invention having side walls and an end wall uses a plunger or a plate having a seal which is biased to move within the tank as water or liquid is forced into the tank or withdrawn from the tank. According to this embodiment, springs may be positioned in different arrangements and used to provide the bias that maintains the water or liquid under pressure. Still other embodiments use mass or weight while still others use power actuated means or air pressure for providing the necessary bias. In other embodiments of the invention, the tank may include a seal and/or a collapsable liner to prevent any of the liquid from passing the plunger or piston. The addition of a collapsable liner is especially useful if the liquid to be maintained under pressure is corrosive.

대표청구항 ▼

A liquid delivery system for pumping a liquid from a supply source to a storage tank, and continuously maintaining said liquid in said storage tank under pressure within a selected range of pressures comprising: a storage tank comprising an end wall and side walls defining a liquid storage container

A liquid delivery system for pumping a liquid from a supply source to a storage tank, and continuously maintaining said liquid in said storage tank under pressure within a selected range of pressures comprising: a storage tank comprising an end wall and side walls defining a liquid storage container, said liquid storage container having a cross-section of a selected shape and selected area extending between a first and farther portion, and a travel axis perpendicular to and extending the length of said selected cross-section, said tank further including liquid receiving and discharging means connected to said end wall; a plunger having a first side and a second side, and an outside shape corresponding to said selected cross-section for providing a sliding fit of said plunger within said liquid storage container along said travel axis and between said first and farther portions such that said first side contacts said liquid contained therein and encloses said liquid storage container so that the volume of said liquid storage container is reduced as said plunger moves from said first portion to said farther portion, and wherein the area of both said first and second sides of said plunger which is perpendicular to said travel axis is equal to said selected area; an end member secured to said side walls to provide an air tight seal therebetween such that compressed air between said end member and said second side of said plunger provides a first biasing means for urging said plunger towards said farther portion; a collapsible liquid impervious liner located within the liquid storage container and connected to said receiving and discharging means such that any liquid provided to said storage tank by said receiving means is contained completely within said liner; second biasing means for urging said plunger towards said farther portion; a pump to receive liquid from said supply source, and to force said liquid into said tank through said liquid receiving and discharging means such that said plunger is moved against said first and second biasing means from said farther portion towards said first portion; and a pressure switch to turn said pump on and off as the pressure of said liquid in said tank varies between said selected range of pressure.