Method for forming a ball valve connection and structure
First Claim
1. A ball valve assembly having a ball member, said ball member having a substantially spherical surface and a through bore formed therein extending substantially along a diameter of said ball member, said through bore being defined by a curved surface having a selected radius of curvature, an arcuate slot means being formed in said spherical surface for receiving an operating stem, said arcuate slot means having a curved bottom wall, said arcuate slot means extending into said spherical surface such a distance that said arcuate slot means intersects said through bore to form an opening from said arcuate slot means into said through bore.
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Accused Products
Abstract
A method of manufacturing a ball valve member for cooperation with a valve and a ball valve member includes utilizing a cutting tool having first and second annular cutting surfaces with one of the cutting surfaces having a smaller radius than the other cutting surface whereby a slot is cut in the surface of the ball valve member to a greater depth than heretofore possible for permitting greater penetration of a valve stem into the ball valve member and a recess is formed adjacent the slot for the ball valve stem for receiving a lug member mounted on the stem to increase torque transmission to the ball valve element when the operation stem is rotated.
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Citations
8 Claims
- 1. A ball valve assembly having a ball member, said ball member having a substantially spherical surface and a through bore formed therein extending substantially along a diameter of said ball member, said through bore being defined by a curved surface having a selected radius of curvature, an arcuate slot means being formed in said spherical surface for receiving an operating stem, said arcuate slot means having a curved bottom wall, said arcuate slot means extending into said spherical surface such a distance that said arcuate slot means intersects said through bore to form an opening from said arcuate slot means into said through bore.
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8. A ball valve assembly, comprising:
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a ball member having a substantially spherical surface with a through bore formed therein extending substantially along a diameter thereof, said through bore being defined by a curved surface having a selected radius of curvature, arcuate slot means formed in said spherical surface having a curved bottom wall and an opening therein in communication with said through bore, said ball member also having an auxiliary recess contiguous with said arcuate slot means and opening thereon; and an operating stem fitting into said arcuate slot means, said operating stem having a user engageable portion at one end and a lug engaging said arcuate slot means at the end opposite said one end, said lug having a threaded extension means which is threaded into said lug means so that the threaded extension means extends transversely from said lug and into said recess of said ball member.
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Specification