Closure member for a medical implant device
First Claim
1. A medical implant device comprising:
- a receiver member including a plurality of wall sections defining a longitudinal bore, wherein said wall sections have an inner threaded portion; and
a closure member including a rearward end, a forward end, a substantially cylindrical body having a longitudinal axis and an outer threaded portion for threaded engagement with said inner threaded portion of said receiver member, wherein the outer thread portion includes a screw form for a given cross-section of thread through a plane which includes the longitudinal axis, the screw form comprising;
a rearward-facing thread surface having a substantially straight sloped portion and at least two non-contiguous curve portions, such that a point on the rearward-facing thread surface at a root of the thread surface is farther from the forward end than a point on the rearward-facing thread surface at a crest of the thread surface when measured along a line parallel to the longitudinal axis;
wherein a maximum thickness of the thread occurs at a point closer to the crest of the thread than the root of the thread.
4 Assignments
0 Petitions
Accused Products
Abstract
A closure member, such as a set screw, and complementary receiving member are included in a medical implant device. The receiving member has a plurality of noncontiguous, threaded walls substantially defining a bore for receiving the threaded closure member. When the closure member is inserted into the receiving member, their respective threads interlock to join the noncontiguous walls of the receiving member. The closure member has an outer thread configured to interlock with the inner walls of the receiving member in a manner that aids in preventing the noncontiguous walls of the receiving member from moving away from the closure member. In certain embodiments, the closure member'"'"'s outer thread includes a trailing edge having a point that is rearward of the trailing edge'"'"'s root, and the outer thread includes a leading edge having a point that is forward of the leading edge'"'"'s root.
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Citations
31 Claims
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1. A medical implant device comprising:
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a receiver member including a plurality of wall sections defining a longitudinal bore, wherein said wall sections have an inner threaded portion; and a closure member including a rearward end, a forward end, a substantially cylindrical body having a longitudinal axis and an outer threaded portion for threaded engagement with said inner threaded portion of said receiver member, wherein the outer thread portion includes a screw form for a given cross-section of thread through a plane which includes the longitudinal axis, the screw form comprising; a rearward-facing thread surface having a substantially straight sloped portion and at least two non-contiguous curve portions, such that a point on the rearward-facing thread surface at a root of the thread surface is farther from the forward end than a point on the rearward-facing thread surface at a crest of the thread surface when measured along a line parallel to the longitudinal axis;
wherein a maximum thickness of the thread occurs at a point closer to the crest of the thread than the root of the thread. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A medical implant device comprising:
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a receiver member including a plurality of noncontiguous wall sections defining a longitudinal bore, wherein said plurality of noncontiguous wall sections include a female threaded portion configured as a helical spiral about a center longitudinal axis of the bore; and a closure member including a substantially cylindrical body having a forward end, a rearward end, a longitudinal axis and a male threaded portion for interlocking engagement with said female threaded portion of said receiver member, wherein the male threaded portion includes a screw form for a given cross-section of thread through a plane parallel to the longitudinal axis, the screw form comprising;
a rearward-facing thread surface having a substantially straight sloped portion and at least two non-contiguous curve portions, such that a point on the rearward-facing thread surface at a root of the thread is farther from the forward end than a point on the rearward-facing thread surface at a crest of the thread when measured along a line that is parallel to the longitudinal axis;
wherein a maximum thickness of the thread occurs at a point closer to the crest of the thread than the root of the thread. - View Dependent Claims (15, 16, 17, 18, 19, 21)
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20. The medical implant device of 14 wherein said male threaded portion is configured as a helical spiral about said body, and wherein the thickness of said male threaded portion at its root and the thickness of said male threaded portion at its crest vary along the helical spiral.
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22. A noncontiguous receiver member and complementary closure member included in a medical implant device, comprising:
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said noncontiguous receiver member having a plurality of noncontiguous wall sections separated by a slot, said wall sections at least partially defining a longitudinal bore, wherein said plurality of noncontiguous wall sections include a female threaded portion that forms substantially a helical spiral about a center longitudinal axis of the bore; and said complementary closure member having a substantially cylindrical body portion and male threaded portion that forms substantially a helical spiral about a center longitudinal axis of the body portion, wherein the male threaded portion includes a screw form for a given cross-section of thread through the longitudinal axis, the screw form comprising;
a rearward-facing thread surface having a substantially straight sloped portion and at least two non-contiguous curve portions, such that a point on the rearward-facing thread surface at a root of the thread is farther from a forward end of the closure member than a point on the rearward-facing thread surface at a crest of the thread to form a rearward peak of said male threaded portion on its trailing-edge surface at some point crestward of its root, and wherein a forward peak of said male threaded portion is provided on its leading-edge surface at some point crestward of its root;
wherein the distance between the rearward peak and the forward peak provides a maximum thickness of the thread;
wherein the maximum thickness of the thread occurs at a point closer to the crest of the thread than the root of the thread. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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29. A medical implant device comprising:
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a means for receiving a closure means, the receiving means including a plurality of noncontiguous wall sections at least partially defining a longitudinal bore, wherein said wall sections have an inner threaded portion; and said closure means for engaging said plurality of noncontiguous wall sections, the closure means including a substantially cylindrical body having an outer threaded portion for threaded engagement with said inner threaded portion of said receiving means, wherein said outer threaded portion includes a screw form for a given cross-section of thread through a longitudinal axis of the closure means, the screw form comprising;
a rearward-facing thread surface having a substantially straight sloped portion and at least two non-contiguous curve portions, such that a point on the rearward-facing thread surface at a root of the thread is farther from a forward end of the closure means than a point on the rearward-facing thread surface at a crest of the thread when measured along a line parallel to the longitudinal axis;
wherein a maximum thickness of the thread occurs at a point closer to the crest of the thread than the root of the thread. - View Dependent Claims (30)
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31. A medical implant device comprising:
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a receiver member including a plurality of noncontiguous wall sections at least partially defining a longitudinal bore, wherein said plurality of noncontiguous wall sections include a female threaded portion arranged as a helical spiral about a center longitudinal axis of the bore; and a closure member including a substantially cylindrical body having a male threaded portion for interlocking engagement with said female threaded portion of said receiver member, wherein said male threaded portion includes a trailing edge having a root adjacent said body and having a crest at a point on said trailing edge that is furthest from a longitudinal axis centered in said cylindrical body when measured along a line perpendicular to said longitudinal axis, wherein said outer threaded portion includes a screw form for a given cross-section of thread through a plane which includes the longitudinal axis, the screw form comprising; a rearward-facing thread surface having a substantially straight sloped portion and at least two non-contiguous curve portions, such that a point on the rearward-facing thread surface at a root of the thread is farther from a forward end of the closure member than a point on the rearward-facing thread surface at a crest of the thread, and a forward-facing thread surface having a substantially straight sloped portion and at least two non-contiguous curve portions, such that a point on the forward-facing thread surface at a root of the forward facing thread surface is closer to the forward end than a point on the forward-facing thread surface at a crest of the forward facing thread surface when measured along a line parallel to the longitudinal axis;
wherein a maximum thickness of the thread occurs at a point closer to the crest of the thread than the root of the thread.
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Specification