Twist fitting for air tank connections
First Claim
1. A fitting connection for a pressure vessel, the fitting connection comprising:
- a cylindrical bushing body having a cylindrical outer surface and defining a longitudinal axis;
a head portion located at an upper end of the bushing body and defining a lower surface;
a passage through the bushing body for passage of a fluid;
at least one locking member having a base portion extending radially from the outer surface of the bushing body, the at least one locking member having an upper surface on the base portion located in spaced relation to the lower surface of the head portion to define a groove for receiving an edge surrounding an aperture in a pressure vessel wall;
the upper surface including a contour varying the distance between the upper surface and the lower surface of the head portion whereby rotation of the bushing within the aperture produces a predetermined frictional force between the locking member and the pressure vessel wall;
the upper surface of the at least one locking member includes a recess for receiving a detent located on the pressure vessel wall, said recess being spaced inward from each end of the upper surface of the at least one locking member.
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Accused Products
Abstract
A fitting connector for a pressure vessel including a bushing for mounting within an aperture defined in a pressure vessel wall. The bushing includes a cylindrical bushing body having a head portion at one end thereof and including at least a pair of locking members for engaging along an interior surface of the pressure vessel wall. The locking members are provided with a contoured surface for engaging with detent members formed on the interior of the pressure vessel wall whereby the bushing is positively locked in a predetermined rotational orientation on the pressure vessel wall and is retained in place until a predetermined torque force is applied.
57 Citations
13 Claims
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1. A fitting connection for a pressure vessel, the fitting connection comprising:
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a cylindrical bushing body having a cylindrical outer surface and defining a longitudinal axis;
a head portion located at an upper end of the bushing body and defining a lower surface;
a passage through the bushing body for passage of a fluid;
at least one locking member having a base portion extending radially from the outer surface of the bushing body, the at least one locking member having an upper surface on the base portion located in spaced relation to the lower surface of the head portion to define a groove for receiving an edge surrounding an aperture in a pressure vessel wall;
the upper surface including a contour varying the distance between the upper surface and the lower surface of the head portion whereby rotation of the bushing within the aperture produces a predetermined frictional force between the locking member and the pressure vessel wall;
the upper surface of the at least one locking member includes a recess for receiving a detent located on the pressure vessel wall, said recess being spaced inward from each end of the upper surface of the at least one locking member. - View Dependent Claims (2, 3, 4, 11, 12)
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5. A fitting connection for a pressure vessel, the fitting connection comprising:
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a bushing including a cylindrical bushing body;
a head portion located at an upper end of the bushing body and defining a lower surface;
a passage through the bushing body for passage of a fluid;
a pressure vessel wall including means defining an aperture;
a detent element located on an interior surface of the pressure vessel wall adjacent an edge of the aperture;
a locking member located on the bushing body. said locking member having an upper surface with a recess spaced inward from each end of the upper surface, said upper surface being in spaced relation to the lower surface to define a groove for receiving the edge of the aperture;
wherein the bushing is rotatable within the aperture, and rotation results in the recess of the locking member engaging the detent element to frictionally lock the bushing in place. - View Dependent Claims (6, 7, 8, 9, 10, 13)
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Specification