Claims
- 1. A discharge container for discharging a liquid received within a container to an external portion from a discharge port on the basis of a pump operation comprising:a cylinder within which a liquid is charged; a first piston slidably provided within said cylinder and urged in a backward moving direction by a first spring; a second piston slidably provided within said cylinder and backward moving while compressing a second spring when the liquid within said cylinder is pressed by said first piston; an inflow port for flowing the liquid from the inner portion of said container to an inner portion of said cylinder; an inflow valve provided between said inflow port and said container, passing the liquid flowing into said cylinder and shutting an outflow of the liquid from the inner portion of said cylinder; an outflow port for flowing the liquid to the external portion from the inner portion of said cylinder; and a liquid passage connecting said outflow port to said discharge port, wherein said cylinder has a small diameter portion having a small inner diameter, a large diameter portion k having a large inner diameter and a step portion corresponding to a boundary therebetween, said first piston is provided within said small diameter portion, said second piston is provided within said large diameter portion so as to oppose to said first piston, said outflow port is formed near a front end portion of said first piston so as to direct to a sliding surface with said cylinder, said liquid passage is connected to said discharge port through said first piston, said inflow port is provided so as to pass through said second piston, said first piston is urged in a direction moving apart from said second piston by said first spring, said second piston is urged by said second spring so as to be brought into contact with said step portion, wherein while said first piston moves at a predetermined stroke, said outflow port is closed, and said second piston moves backward while pressing and compressing said second spring by the liquid existing between said first piston and said second piston, and wherein when said first piston moves over the predetermined stroke, said outflow port is opened, said second piston is pressed back to said second spring and the liquid within said cylinder is discharged to the external portion via said outflow port, said liquid passage and said discharge port due to an urging force of said second spring.
- 2. A discharge container for discharging a liquid received within a container to an external portion from a discharge port on the basis of a pump operation comprising:a cylinder within which a liquid is charged; a first piston slidably provided within said cylinder and urged in a backward moving direction by a first spring; a second piston slidably provided within said cylinder and backward moving while compressing a second spring when the liquid within said cylinder is pressed by said first piston; an inflow port for flowing the liquid from the inner portion of said container to an inner portion of said cylinder; an inflow valve provided between said inflow port and said container, passing the liquid flowing into said cylinder and shutting an outflow of the liquid from the inner portion of said cylinder; an outflow port for flowing the liquid to the external portion from the inner portion of said cylinder; and a liquid passage connecting said outflow port to said discharge port, wherein said cylinder is constituted by an outer cylinder formed in a cylindrical body having a bottom, and an inner cylinder provided within said outer cylinder and having a bottom portion communicated with said outer cylinder via a communication portion, said first piston is formed in a cylindrical shape and outward fitted to said inner cylinder, a lower end portion of said first piston is slidably in contact with an inner peripheral surface of said outer cylinder and an outer peripheral surface of said inner cylinder, said second piston is provided within said inner cylinder, said liquid passage is formed in a gap between an inner peripheral surface above the lower end portion of said first piston and the outer peripheral surface of said inner cylinder, said outflow port is formed between the inner peripheral surface of said first piston and said communication portion in a state that the lower end portion of said first piston passes through said communication portion, said inflow port is provided in the bottom portion of said inner cylinder, said first piston is urged in a direction moving apart from the bottom portion of said outer cylinder by said first spring, said second piston is urged toward the bottom portion of said inner cylinder by said second spring, and wherein when said first piston moves over the predetermined stroke, the lower end portion of said first piston moves over said communication portion and said outflow port is opened, and said second piston is pressed back to said second spring and the liquid within said cylinder is discharged to the external portion via said outflow port, said liquid passage and said discharge port due to an urging force of said second spring.
- 3. A discharge container for discharging a liquid received within a container to an external portion from a discharge port on the basis of a pump a pump operation comprising:a cylinder within which a liquid is charged; a first piston slidably provided within said cylinder and urged in a backward moving direction by a first spring; a second piston slidably provided within said cylinder and backward moving while compressing a second spring when the liquid within said cylinder is pressed by said first piston; an inflow port for flowing the liquid from the inner portion of said container to an inner portion of said cylinder; an inflow valve provided between said inflow port and said container, passing the liquid flowing into said cylinder and shutting an outflow of the liquid from the inner portion of said cylinder; an outflow port for flowing the liquid to the eternal portion from the inner portion of said cylinder; and a liquid passage connecting said outflow port to said discharge port, wherein said cylinder is constituted by an outer cylinder formed in a cylindrical body having a bottom, and an inner cylinder formed on an inner peripheral surface of a cylindrical second piston provided within said outer cylinder, said second piston is slidably in contact with an inner peripheral surface of said outer cylinder and having a bottom surface portion facing to the liquid within said cylinder, said first piston is provided within said inner cylinder, a lower end portion of said first piston is slidably in contact with an inner peripheral surface of said inner cylinder toward a bottom surface of said outer cylinder, said liquid passage is formed above said lower end portion with a gap with respect to the inner peripheral surface of said inner cylinder, said outflow port is formed between the bottom surface portion of said second piston and the lower end portion of said first piston in a state that the lower end portion of said first piston protrudes out from the bottom surface portion of said second piston, said inflow port is provided in the bottom surface of said outer cylinder, said first piston is urged in a direction moving apart from the bottom portion of said outer cylinder by said first spring, said second piston is urged toward the bottom portion of said outer cylinder, and wherein when said first piston moves over the predetermined stroke, the lower end portion of said first piston moves over the bottom surface portion of said second piston and said outflow port is opened, and said second piston is pressed back to said second spring and the liquid within said cylinder is discharged to the external portion via said outflow port, said liquid passage and said discharge port due to an urging force of said second spring.
- 4. A discharge container for discharging a liquid received within a container to an external portion from a discharge port on the basis of a pump operation comprising:a cylinder within which a liquid is charged; a first piston slidably provided within said cylinder and urged in a backward moving direction by a first spring; a second piston slidably provided within said cylinder and backward moving while compressing a second spring when the liquid within said cylinder is pressed by said first piston; an inflow port for flowing the liquid from the inner portion of said container to an inner portion of said cylinder; an inflow valve provided between said inflow port and said container, passing the liquid flowing into said cylinder and shutting an outflow of the liquid from the inner portion of said cylinder; an outflow port for flowing the liquid to the external portion from the inner portion of said cylinder; and a liquid passage connecting said outflow port to said discharge port, wherein said cylinder is formed in a cylindrical shape, said first piston and said second piston are provided within said cylinder so as to oppose to each other, said outflow port is open to a side surface of said cylinder corresponding to a part of a stroke of said second piston, said inflow port is provided so as to extend through said second piston, said first piston is urged in a direction moving apart from said second piston by said first spring, said second piston is urged toward said first piston by said second spring, and wherein while said first piston moves to the predetermined stroke, said outflow port is closed by a side surface of said second piston, and when said first piston moves over the predetermined stroke, said second piston is pressed, an end portion in a side of said first piston moves over said outflow port and said outflow port is opened, and said second piston is pressed back to said second spring and the liquid within said cylinder is discharged to the external portion via said outflow port, said liquid passage and said discharge port due to an urging force of said second spring.
- 5. A discharge container for discharging a liquid received within a container to an external portion from a discharge port on the basis of a pump operation comprising:a case with a bottom held in said container; a first piston provided on a bottom surface of said case; a cylinder outward fitted to the first piston within said case and filled with a liquid therewithin; a second piston provided within said cylinder with a predetermined gap with respect to said first piston; a first spring urging said cylinder upward; a second spring urging said second piston to a side of said first piston; an inflow port extending through said first piston so as to flow the liquid from said container into said cylinder; an inflow valve provided between said inflow port and said container so as to pass the liquid flowing into said cylinder and prevent the liquid from flowing out from the inner portion of said cylinder; an outflow valve urged to an upper surface of said second piston by said second spring so as to be brought into contact therewith, having an outer peripheral portion protruding from an outer peripheral edge of said second piston so as to be slidably brought into contact with an inner peripheral surface of said cylinder and having a portion protruding out from the outer peripheral edge of said second piston and facing to the liquid within said cylinder; an outflow port formed in a contact portion between said outflow valve and said second piston and flowing out the liquid to an external portion from an inner portion of said cylinder; a liquid passage connecting said outflow port to said discharge port; and a gap holding member arranged between an upper surface of said first piston and a lower surface of said second piston so as to keep a gap between the both, wherein a recess portion to which said gap holding member can be inserted in a moving direction at a predetermined distance is provided on a surface of said second piston opposing to said first piston, and a guide portion for guiding said gap holding member to said recess portion when said cylinder is pressed down is provided in said cylinder, wherein said gap holding member is held by said first spring in a state of being out of said recess portion when said cylinder is not pressed down, wherein when pressing downward said cylinder to the predetermined stroke, said gap holding member is brought into contact with said first piston and said second piston in a state of being out of said recess portion so as to press and compress said second spring while keeping a gap between the both, and wherein when pressing down said cylinder over the predetermined stroke, said gap holding member is guided by said guiding member so as to be inserted to said recess portion, and said gap holding member press down said second piston downward at a distance that said gap holding member is inserted to said recess portion by said second spring, thereby applying a pressure to the liquid within said cylinder, so that said second spring is pressed and compressed by the pressure of said liquid, said outflow valve is opened so as to open said outflow port, and the liquid is flowed out to the external portion via said outflow port, said liquid passage and said discharge port.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2000-201413 |
Jul 2000 |
JP |
|
Parent Case Info
This application is the national phase under 35 U.S.C. §371 of PCT International Application No. PCT/JP01/05573 which has an International filing date of Jun. 28, 2001, which designated the United States of America.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
PCT/JP01/05573 |
|
WO |
00 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO02/02241 |
1/10/2002 |
WO |
A |
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4053089 |
Gamadia |
Oct 1977 |
A |
Foreign Referenced Citations (1)
Number |
Date |
Country |
51-6361 |
Feb 1976 |
JP |