US6258090B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closure for open ended medical implant and removal tool
Assignee: Individual
•
Filing: 2000-04-28
•
Granted: 2001-07-10
•
Expires: 2020-04-28
Abstract
Abstract A closure for use with an open headed medical implant with a pair of inwardly threaded arms. The closure is bow-tie-shaped having a pair of opposed cylindrical sections that have outwardly threaded surfaces that are discontinuous therebetween. The cylindrical surfaces are joined by walls having outer curved surfaces each having a radius that is less than a radius associated with the cylindrical surfaces. The closure also has a central bore receiving a set screw in use. Tools for installing the closure include a tool with a head having a channel receiving the closure and wings on opposite sides of the channel that have outer surfaces that are threaded so as to compliment and complete the threads on the outside of the closure, when the tool is thereon, so as to provide a substantially continuous circumferential thread for installation. A group of removal tools includes a first tool having a head that fits over the closure and includes a pair of wings with outer cam surfaces thereon for operably wedging apart the implant arms and a second non-threaded tool for turning the closure once the arms are wedged apart.
Inventors
- 👤 Roger P. Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:38
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/70; A61B17/7074; A61B17/7091; A61B17/7001; A61B17/7032; A61B90/00; A61B90/03; A61B2090/031; A61B2090/037
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
114 words
A closure for an open ended medical implant having a pair of spaced and internally threaded arms; said closure comprising: a) a closure body having a thread on a radially outward facing surface; said body thread sized and located to be adapted to mate with internal threads on the implant arms; b) said body having opposed equal cylindrical segments such that the body thread is discontinuous; said segments being connected by a radiused joining surface having a radius that is less than a radius associated with said segments; c) said body having a central threaded bore; and d) a threaded set screw sized and shaped to be received in said threaded bore in use.
Claim 2
Dependent Claim
114 words
A closure for an open ended medical implant having a pair of spaced and internally threaded arms; said closure comprising: a) a closure body having a thread on a radially outward facing surface; said body thread sized and located to be adapted to mate with internal threads on the implant arms; b) said body having opposed equal cylindrical segments such that the body thread is discontinuous; said segments being connected by a radiused joining surface having a radius that is less than a radius associated with said segments; c) said body having a central threaded bore; and d) a threaded set screw sized and shaped to be received in said threaded bore in use.
Claim 3
Dependent Claim
27 words
The closure according to claim 1 wherein: a) said body thread is in two opposed equal portions extending in total substantially less than 360° about said body.
Claim 4
Dependent Claim
17 words
The closure according to claim 1 wherein: a) a said body is bow-tie-shaped when viewed from above.
Claim 5
Dependent Claim
83 words
The closure according to claim 1 in combination with a complimenting installation tool; said tool including: a) a handle for turning by a user; b) a head having a channel sized and shaped to receive said closure body; said head also having a pair of externally threaded wings located on either side of said channel and having threads sized and positioned to compliment threads on said closure to form a continuous thread when joined, such that said closure is screwable into an implant.
Claim 6
Dependent Claim
55 words
A closure for an open ended medical implant having a pair of spaced and internally threaded arms; said closure comprising: a) a closure body having a partial cylindrical shape with at least one outer portion of uniform radius removed; and b) said body having a radially outer surface that is threaded with a discontinuous thread.
Claim 7
Dependent Claim
55 words
A closure for an open ended medical implant having a pair of spaced and internally threaded arms; said closure comprising: a) a closure body having a partial cylindrical shape with at least one outer portion of uniform radius removed; and b) said body having a radially outer surface that is threaded with a discontinuous thread.
Claim 8
Dependent Claim
20 words
The closure according to claim 5 wherein: a) said body has a pair of equal and opposite outer portions removed.
Claim 9
Dependent Claim
12 words
The closure according to claim 6 wherein: a) said body is bow-tie-shaped.
Claim 10
Dependent Claim
37 words
The closure according to claim 7 wherein: b) said body includes an axially extending pass through and threaded bore; and including c) a set screw sized and shaped to be operably received in said bore during use.
Claim 11
Dependent Claim
70 words
The closure according to claim 8 wherein: a) said body has a first wall between said bore and each of a pair of outer partial cylindrical shaped and threaded surfaces that is of a uniform first thickness and a second wall between said bore and each of a pair of curved walls between said threaded surfaces that are of a uniform second thickness that is less than said first thickness.
Claim 12
Dependent Claim
79 words
A closure for an open ended medical implant; said closure comprising; b) a closure body having a pair of opposed cylindrical sectors with each of said sectors having radially outward curved surfaces with a first radius and with threads thereon sized and shaped to threadably mate with threads of the medical implant; said sector threads being discontinuous with each other; said sectors being joined by curved walls having an outer second radius that is less than said first radius.
Claim 13
Dependent Claim
79 words
A closure for an open ended medical implant; said closure comprising; b) a closure body having a pair of opposed cylindrical sectors with each of said sectors having radially outward curved surfaces with a first radius and with threads thereon sized and shaped to threadably mate with threads of the medical implant; said sector threads being discontinuous with each other; said sectors being joined by curved walls having an outer second radius that is less than said first radius.
Claim 14
Dependent Claim
22 words
The closure according to claim 10 wherein: p 1 a) said closure body includes a central pass through and coaxial threaded bore.
Claim 15
Dependent Claim
108 words
A medical implant system comprising: a) a medical implant having an open channel positioned between a pair of arms and being sized and shaped to receive a rod member; said arms being spaced and having threaded internal facing surfaces; b) a closure body having a radially outward discontinuous threaded surface having a first radius joined by a curved wall having a second radius less than said first radius; said closure body having an axially aligned pass through threaded bore; and c) a threaded set screw operably received in said bore during installation and being sized and shaped to have a tip extending from said bore when fully installed.
Claim 16
Dependent Claim
108 words
A medical implant system comprising: a) a medical implant having an open channel positioned between a pair of arms and being sized and shaped to receive a rod member; said arms being spaced and having threaded internal facing surfaces; b) a closure body having a radially outward discontinuous threaded surface having a first radius joined by a curved wall having a second radius less than said first radius; said closure body having an axially aligned pass through threaded bore; and c) a threaded set screw operably received in said bore during installation and being sized and shaped to have a tip extending from said bore when fully installed.
Claim 17
Dependent Claim
16 words
The implant system according to claim 12 wherein: a) said medical implant is a bone screw.
Claim 18
Dependent Claim
42 words
The implant system according to claim 12 wherein: A) said closure body includes two opposed cylindrical sectors with a radially outward surface of each of said sectors being threaded so as to be mateable with the threads of said arm facing surfaces.
Claim 19
Dependent Claim
98 words
The implant system according to claim 12 in combination with a closure removal tool; said closure installation tool comprising: a) a handle for turning by a user; b) a head coaxially attached to said handle; said head including a channel for receiving said closure and a pair of wings on opposite sides of said channel; each of said wings having a radially outward surface that includes a non-uniform radius cam; each of said wings operably being biasable against the arms of the implant holding said closure so as to spread the arms and loosen said closure for removal.
Claim 20
Dependent Claim
106 words
A tool for removing a closure threadedly received between a pair of arms of an implant under torque; said tool comprising: a) a shaft having an operator turning handle at one end and a head at an opposite end thereof; b) said head having a channel sized and shaped to receive such a closure and a pair of wings on either side of said channel; and c) each of said wings having an outer cam surface that has a nonuniform radius, so that said tool is positionable over such a closure and rotatable such that said cam surfaces engage and wedge apart arms of the implant.
Claim 21
Dependent Claim
106 words
A tool for removing a closure threadedly received between a pair of arms of an implant under torque; said tool comprising: a) a shaft having an operator turning handle at one end and a head at an opposite end thereof; b) said head having a channel sized and shaped to receive such a closure and a pair of wings on either side of said channel; and c) each of said wings having an outer cam surface that has a nonuniform radius, so that said tool is positionable over such a closure and rotatable such that said cam surfaces engage and wedge apart arms of the implant.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-07-09 | 2005-01-08 | 2005-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-07-09 | 2009-01-08 | 2009-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-07-09 | 2013-01-08 | 2013-07-10 | $7700.00 | Window Closed / Lapsed |