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US 6,662,824 B2Granted
Check valve slantedly biased against pressure-imposing direction
AssigneeDenso Corporation
InventorsShozo Inage, Kaneyoshi Nagatani
Life of this patent
Estimating the term…
Abstract
A check valve allowing one-way fluid flow is disposed at an outlet side of a pressurizing pump. The check valve includes a valve seat and a valve body for opening and closing a fluid passage in response to a fluid pressure supplied to the check valve. The valve body is biased by a biasing member such as a spring in a direction to close the fluid passage. To suppress vibration of the valve body occurring at its open position due to pulsating fluid pressure supplied from the pump, a biasing force is applied to the valve body in a direction slanted from the fluid pressure-imposing direction. The valve body is pushed against a sidewall by a lateral component included in the biasing force, and thereby the vibration of the valve body is suppressed.
Claims13
A check valve comprising:
- a valve casing having a fluid passage formed therein;
- a valve seat formed in the fluid passage;
- a valve body positioned on the valve seat for opening and closing the fluid passage according to a fluid pressure imposed on the valve body;
- and
- a biasing member contained in the valve casing for biasing the valve body in a direction to close the fluid passage, wherein;
- a sidewall for restricting a lateral movement of the valve body is formed downstream of the valve seat;
- and
- the biasing member applies its biasing force to the valve body in a direction slanted from a direction in which the fluid pressure is imposed on the valve body, so that the valve body is pushed to the sidewall by a lateral component of the biasing force and the lateral movement of the valve body is restricted by the sidewall when the valve body opens the fluid passage, wherein:
- the biasing member is composed of a spring and a member interposed between the spring and the valve body for transferring a biasing force of the spring to the valve body;
- the valve body is a metallic ball;
- and
- the member for transferring the biasing force is a metallic ball contacting the valve body.
9 more elements
A check valve comprising:
- a valve casing having a fluid passage formed therein;
- a valve seat formed in the fluid passage;
- a valve body positioned on the valve seat for opening and closing the fluid passage according to a fluid pressure imposed on the valve body;
- and
- a biasing member contained in the valve casing for biasing the valve body in a direction to close the fluid passage, wherein:
- a sidewall for restrictin a lateral movement of the valve body is formed downstream of the valve seat;
- and
- the biasing member applies its biasing force to the valve body in a direction slanted from a direction in which the fluid pressure is imposed on the valve body, so that the valve body is pushed to the sidewall by a lateral component of the biasing force and the lateral movement of the valve body is restricted by the sidewall when the valve body opens the fluid passage, wherein:
- the biasing member is composed of a spring and a member interposed between the spring and the valve body for transferring a biasing force of the spring to the valve body;
- the valve body is a metallic ball;
- and
- the valve casing includes a ceiling wall for restricting movement of the valve body in the direction in which the fluid pressure is imposed thereon.
9 more elements
A check valve comprising:
- a valve casing having a fluid passage formed therein;
- a valve seat formed in the fluid passage;
- a valve body positioned on the valve seat for opening and closing the fluid passage according to a fluid pressure imposed on the valve body;
- and
- a biasing member contained in the valve casing for biasing the valve body in a direction to close the fluid passage, wherein:
- a sidewall for restricting a lateral movement of the valve body is formed downstream of the valve seat;
- and
- the biasing member applies its biasing force to the valve body in a direction slanted from a direction in which the fluid pressure is imposed on the valve body, so that the valve body is pushed to the sidewall by a lateral component of the biasing force and the lateral movement of the valve body is restricted by the sidewall when the valve body opens the fluid passage, wherein:
- the biasing member is composed of a spring and a member interposed between the spring and the valve body for transferring a biasing force of the spring to the valve body;
- and
- the valve casing includes an outlet port of the fluid passage, the outlet port being formed in a direction in which the lateral component of the biasing force is directed.
8 more elements
A check valve comprising:
- a valve casing having a fluid passage formed therein;
- a valve seat formed in the fluid passage;
- a valve body positioned on the valve seat for opening and closing the fluid passage according to a fluid pressure imposed on the valve body;
- and
- a biasing member contained in the valve casm for biasing the valve body in a direction to close the fluid passage, wherein:
- a sidewall for restricting a lateral movement of the valve body is formed downstream of the valve seat;
- and
- the biasing member applies its biasing force to the valve body in a direction slanted from a direction in which the fluid pressure is imposed on the valve body, so that the valve body is pushed to the sidewall by a lateral component of the biasing force and the lateral movement of the valve body is restricted by the sidewall when the valve body opens the fluid passage, wherein:
- the biasing member is composed of a spring and a member interposed between the spring and the valve body for transferring a biasing force of the spring to the valve body;
- the valve casing is composed of a seat member disposed at an upstream side of the fluid passage and a sleeve connected to the seat member at a down stream side of the fluid passage;
- the valve seat is formed on an upstream end of the seat member;
- and
- the sidewall is formed in the sleeve, and the spring and the biasing force transferring member are contained in the sleeve.
10 more elements
A check valve comprising:
- a valve casing having a fluid passage formed therein;
- a valve seat formed in the fluid passage;
- a valve body positioned on the valve seat for opening and closing the fluid passage according to a fluid pressure imposed on the valve body;
- and
- a biasing member composed of a resilient member and a biasing force transferring member, the biasing member biasing the valve body in a direction to close the fluid passage, wherein:
- a sidewall for restricting a lateral movement of the valve body is formed downstream of the valve seat;
- the resilient member exerts a biasing force on the biasing force transferring member in a direction parallel to but eccentric to a direction in which the fluid pressure is imposed on the valve body;
- and
- the biasing force transferring member contacts the valve body to transfer the biasing force to the valve body in a direction slanted from the direction in which the biasing force is exerted on the biasing force transferring member, so that the valve body is pushed toward the sidewall by a lateral component of the biasing force, and the lateral movement of the valve body is restricted by the sidewall when the valve body opens the fluid passage.
6 more elements
A check valve comprising:
- a valve casing having a fluid passage formed therein;
- a valve seat formed in the fluid passage;
- a valve body positioned on the valve seat for opening and closing the fluid passage according to a fluid pressure imposed on the valve body;
- and
- a biasing member composed of a resilient member and a biasing force transferring member, the biasing member biasing the valve body in a direction to close the fluid passage, wherein:
- a sidewall for restricting a lateral movement of the valve body is formed downstream of the valve seat;
- the resilient member is disposed in a cylindrical inner space of the valve casing, an axial direction of the cylindrical inner space being in parallel to but eccentric to a direction in which the fluid pressure is imposed on the valve body;
- and
- the biasing force transferring member contacts the valve body to transfer the biasing force to the valve body in a direction slanted from the axial direction of the cylindrical inner space, so that the valve body is pushed toward the sidewall by a lateral component of the biasing force and the lateral movement of the valve body is restricted by the sidewall when the valve body opens the fluid passage.
6 more elements
Dependencies are inferred from the claim text.