Swivel joint with uniform ball bearing requirements
First Claim
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1. A swivel joint, comprising:
- a male connector having a central axis, a terminal end, a male main bearing race, a male center bearing race on a side of the male main bearing race opposite from the terminal end, and a male support bearing race on a side of the male center bearing race opposite the male main bearing race, the male support bearing race having a diameter greater than diameters of the male main bearing race and male center bearing race;
a female connector coaxially interconnected with the male connector along the central axis, a distal end of the male connector being inserted into the female connector, the female connector having female main, female center, and female support bearing races that respectively form cavities with the male main, male center, and male support bearing races, such as to define main, center, and support bearing cavities, the female support bearing race being closer to a rim of the female connector than the female main bearing race;
a step circumscribing the male connector between the support and center bearing races that defines a radial change of the male connector;
a same number of balls in each of the main, center, and support bearing cavities, the same number of balls having a same diameter, wherein each of the main, center, and support bearing cavities is filled with the same number of balls to a capacity such that no additional ball of the same diameter can be added to each of the main, center, and support bearing cavities in addition to the same number of balls.
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Abstract
A swivel joint has uniform ball bearing requirements for all bearing races. The swivel joint has a male connector and a female connector that coaxially interconnects and swivel relative to each other while still maintaining a high pressure seal. Each connector has three bearing races to form three sets of bearing races, each of which supports the same number of ball bearings. The circumference of the main set of races are enlarged by less than the diameter of one ball, so it is impossible to add another ball to the coupled male and female connectors of the swivel joint.
291 Citations
20 Claims
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1. A swivel joint, comprising:
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a male connector having a central axis, a terminal end, a male main bearing race, a male center bearing race on a side of the male main bearing race opposite from the terminal end, and a male support bearing race on a side of the male center bearing race opposite the male main bearing race, the male support bearing race having a diameter greater than diameters of the male main bearing race and male center bearing race; a female connector coaxially interconnected with the male connector along the central axis, a distal end of the male connector being inserted into the female connector, the female connector having female main, female center, and female support bearing races that respectively form cavities with the male main, male center, and male support bearing races, such as to define main, center, and support bearing cavities, the female support bearing race being closer to a rim of the female connector than the female main bearing race; a step circumscribing the male connector between the support and center bearing races that defines a radial change of the male connector; a same number of balls in each of the main, center, and support bearing cavities, the same number of balls having a same diameter, wherein each of the main, center, and support bearing cavities is filled with the same number of balls to a capacity such that no additional ball of the same diameter can be added to each of the main, center, and support bearing cavities in addition to the same number of balls. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A swivel joint, comprising:
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a male connector having a central axis and three bearing races including a male main bearing race, a male support bearing race having a diameter greater than a diameter of the male main bearing race, and a male center bearing race having a diameter less than a diameter of the male support bearing race and located between the male main and the male support being races, the male main bearing race being closer to a distal end of the male connector than the male support bearing race and the male center bearing race, and the male connector having a larger outer diameter adjacent the male support bearing race than adjacent the male main and center bearing races; a female connector coaxially interconnected with the male connector along the central axis, and having female main, female center, and female support bearing races that respectively form cavities with the male main, male center, and male support bearing races, such as defining main, center, and support bearing cavities, the female support bearing race being closer to a rim of the female connector than the female main bearing race, the female connector having a same inner diameter adjacent the female main bearing race and the female center bearing race, and the female connector having a larger inner diameter adjacent the female support bearing race than adjacent the female main and center bearing races; a same number of balls in each of the main, center, and support bearing cavities, the same number of balls having a same diameter, wherein each of the main, center, and support bearing cavities is filled with the same number of balls to a full capacity such that no additional ball of the substantially same diameter can be added to each of the main, center, and support bearing cavities in addition to the same number of balls; and wherein a circumference of the male connector adjacent the male main bearing race is substantially the same as a circumference of the male connector adjacent the center bearing race, and a circumference adjacent the male support bearing race is greater than the circumference of the male connector adjacent the main and center bearing races by an amount less than a diameter of any of the balls. - View Dependent Claims (17, 18, 19)
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20. A swivel joint, comprising:
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a male connector having a central axis, a male main bearing race, a male support bearing race having a diameter greater than a diameter of the male main bearing race, and a male center bearing race having a diameter the same as the diameter of the male main bearing race and located between the male main and the male support bearing races, the male main bearing race being closer to a distal end of the male connector than the male support bearing race; a radial transition circumscribing the male connector so that the radius of the male connector adjacent the male support bearing race is greater than the radius of the male connector adjacent the male center bearing race; a female connector coaxially interconnected with the male connector along the central axis, and having female main, female center, and female support bearing races that respectively form cavities with the male main, male center, and male support bearing races, such as defining main, center, and support bearing cavities, the female support bearing race being closer to a rim of the female connector than the female main bearing race; a same number of balls in each of the main, center, and support bearing cavities, the same number of balls having a uniform diameter, wherein each of the main, center, and support bearing cavities is filled with the same number of balls to a full capacity that no additional ball of the same uniform diameter can be added to each of the main, center, and support bearing cavities in addition to the same number of balls; and wherein the male connector adjacent the male support bearing race has a circumference that is greater than a circumference of the male connector adjacent the male center bearing race by an amount less than the ball diameter.
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Specification