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US 6,390,318 B1Granted
Sealed container
AssigneeDenso Corporation
InventorsAkihito Tanaka, Shinichi Oda, Izumi Kitazawa
Life of this patent
Estimating the term…
Abstract
The present invention provides a seal portion mounted on an inner wall of a cap. When the cap is removed from the main body of the container, the seal is positioned below a position where a first screw thread is screwed to a second screw thread. The first screw thread is formed on inside or outside of an outer cylindrical wall of the main body of the container. Whereas, the second screw portion is formed on the outer circumference or the inner circumference of the outer wall portion of the cap.
Claims14
A sealed container comprising:
- a main body of a container for accommodating an internal fluid;
- a removable cap for sealing an injection port of a passage for injecting a fluid into the main body of the container;
- an annular seal portion providing a seal between the main body of the container and the cap;
- a protrusion that protrudes from an outer circumferential surface of an outer cylindrical wall of the main body;
- a locked portion that locks portions surrounding the cap by engaging the protrusions of the main body;
- a first spring acting within a positive pressure control valve attached to the cap;
- and
- a second spring acting within a negative pressure control valve attached to the cap;
- wherein the first and the second springs are coaxially aligned;
- wherein the main body of the container has an inner cylindrical wall forming the injection port, the outer cylindrical wall provided on an outer side of the inner cylindrical wall and a first screw portion formed on an inner side or an outer side of the outer cylindrical wall;
- wherein the cap has an inner wall portion inserted inside of the inner cylindrical wall, an outer wall portion provided on the outer side of the inner wall portion and screwed on the outer cylindrical wall and a second screw portion formed on an outer circumference or an inner circumference of the outer wall portion and screwed with the first screw portion;
- wherein on the outer cylindrical wall of the main body of the container, an overflow path is provided for discharging a fluid leaking from a position beneath the first screw portion through a gap between the seal portion and the inner cylindrical wall to the outside of the sealed container;
- and
- wherein the seal portion is mounted between the inner cylindrical wall and the inner wall portion, when the cap is removed from the main body of the container, the seal portion is positioned below a position where the first screw portion is screwed with the second screw portion.
11 more elements
A sealed fluid system comprising:
- a container for accommodating an internal fluid;
- a removable cap for sealing an overflow path within an overflow pipe leading from an interior of the container to an exterior of the container, the removable cap further comprising;
- a top handle portion which interfaces with the container to secure the cap to the container;
- a protrusion that protrudes from an outer circumferential surface of an outer cylindrical wall of the container;
- a locked portion that locks portions surrounding the cap by the protrusion of the container;
- a positive pressure valve and a negative pressure valve, contained by a valve case having a flanged peripheral portion that locks into an elastic locking portion of the cap, the positive pressure valve and the negative pressure valve being vertically and coaxially aligned and respectively symmetrical about a vertical axis;
- a first end of a positive pressure valve spring acting against a top interior portion of the valve case and a second end of the positive pressure valve spring acting against the positive pressure valve;
- a first end of a negative pressure valve spring acting against a bottom interior portion of the valve case and a second end of the negative pressure valve spring acting against the negative pressure valve;
- and
- an annular gasket sandwiched between the positive pressure valve and the negative pressure valve and held in place by the opposing forces of the positive pressure valve spring and the negative pressure valve spring;
- wherein the valve case has communicating holes in a direction axial to the valve springs and in a direction perpendicular to the valve springs to permit fluid communication between the overflow pipe and the container;
- wherein there is a single sealed gasket between the valve case and the container for permitting fluid flow to the overflow pipe when the cap is removed during a positive pressure situation.
9 more elements
Dependencies are inferred from the claim text.