Patent US4655199A successfully refreshed from Google Patents.
US4655199A
Expired / Lapsed
US
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Spinal column straightening apparatus
Assignee: DePuy Spine LLC
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Filing: 1985-03-29
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Granted: 1987-04-07
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Expires: 2005-03-29
Abstract
Abstract An apparatus for maintaining a desired spatial relationship between adjacent vertebrae and the sacrum includes a spinal plate which engages both the sacrum and vertebrae. The spinal plate is connected with the vetebrae and the sacrum by fastener assemblies. In order to enable a fastener assembly to engage the relatively thin sacrum, a fixture is connected with the spinal plate to enable the fastener which engages the sacrum to be skewed at an acute angle. The fixture has a mounting end portion which is slidably received in a slot in the spinal plate and a head end portion through which the fastener assembly extends.
Inventors
- 👤 Arthur D. Steffee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:49
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/70; A61B17/7055
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
169 words
An apparatus for maintaining a desired spatial relationship between adjacent vertebrae and the sacrum, said apparatus comprising: elongated plate means for engaging the vertebrae and the sacrum, said elongated plate means including surface means defining a plurality of openings; first force transmitting means extending through a first opening of the plurality of openings in said plate means for transmitting force along a first axis to connect said plate means with a vertebra; a fixture projecting from said plate means, said fixture having a mounting end portion which is disposed in a second opening of the plurality of openings and an outer end portion which is offset to one side of said mounting end portion; and second force transmitting means extending through an opening in said outer end portion of said fixture for transmitting force along a second axis which is skewed at an acute angle relative to a plane containing the first axis and the central axis of said plate means to connect said plate means with the sacrum.
Claim 2
Independent Claim
169 words
An apparatus for maintaining a desired spatial relationship between adjacent vertebrae and the sacrum, said apparatus comprising: elongated plate means for engaging the vertebrae and the sacrum, said elongated plate means including surface means defining a plurality of openings; first force transmitting means extending through a first opening of the plurality of openings in said plate means for transmitting force along a first axis to connect said plate means with a vertebra; a fixture projecting from said plate means, said fixture having a mounting end portion which is disposed in a second opening of the plurality of openings and an outer end portion which is offset to one side of said mounting end portion; and second force transmitting means extending through an opening in said outer end portion of said fixture for transmitting force along a second axis which is skewed at an acute angle relative to a plane containing the first axis and the central axis of said plate means to connect said plate means with the sacrum.
Claim 3
Dependent Claim
37 words
An apparatus as set forth in claim 1 wherein said second force transmitting means slopes outwardly away from said plate means and engages the sacrum only at a location offset to one side of said plate means.
Claim 4
Dependent Claim
50 words
An apparatus as set forth in claim 1 wherein said second force transmitting means slopes inwardly toward said plate means from a location disposed to one side of said plate means to enable said second force transmitting means to engage the sacrum at a location inwardly of said plate means.
Claim 5
Dependent Claim
80 words
An apparatus as set forth in claim 1 wherein said plate means includes an inner major side and an outer major side, said inner major side of said plate means being engageable with the vertebrae and sacrum, said outer major side of said plate means facing away from and extending generally parallel to said inner major side, said outer end portion of said fixture having a surface disposed in abutting engagement with said outer major side of said plate means.
Claim 6
Dependent Claim
27 words
An apparatus as set forth in claim 1 wherein said plurality of openings are elongated slots, and said fixture is adapted to move along said second opening.
Claim 7
Independent Claim
174 words
An apparatus for use with an elongated plate which engages a patient's vertebrae and which elongated plate has surface means defining a plurality of openings for a first force transmitting means to extend through to transmit force along a first axis to connect the elongated plate with a vertebra, said apparatus comprising: a one-piece fixture having a mounting end portion for receipt in an opening in the elongated plate and having an outer end portion for engaging the patient's sacrum spaced apart from said mounting end portion, said outer end portion having surface means for abuttingly engaging a portion of the elongated plate which faces away from a patient's vertebrae and an opening for second force transmitting means to extend therethrough for connecting said fixture to the sacrum, the opening in said outer end portion being disposed so the second force transmitting means is offset to one side of the elongated plate and extends at an acute angle relative to a plane containing the first axis and the longitudinal axis of the elongated plate.
Claim 8
Independent Claim
174 words
An apparatus for use with an elongated plate which engages a patient's vertebrae and which elongated plate has surface means defining a plurality of openings for a first force transmitting means to extend through to transmit force along a first axis to connect the elongated plate with a vertebra, said apparatus comprising: a one-piece fixture having a mounting end portion for receipt in an opening in the elongated plate and having an outer end portion for engaging the patient's sacrum spaced apart from said mounting end portion, said outer end portion having surface means for abuttingly engaging a portion of the elongated plate which faces away from a patient's vertebrae and an opening for second force transmitting means to extend therethrough for connecting said fixture to the sacrum, the opening in said outer end portion being disposed so the second force transmitting means is offset to one side of the elongated plate and extends at an acute angle relative to a plane containing the first axis and the longitudinal axis of the elongated plate.
Claim 9
Dependent Claim
143 words
An apparatus as set forth in claim 6 wherein said mounting end portion includes a pair of parallel side surfaces extending in a direction substantially perpendicular to said surface means of said outer end portion and being connected by a pair of opposite arcuate end portions, the lengths of said parallel side surfaces being greater than the diameters of said arcuate end portions, said parallel side surfaces being for engagement with respective inner parallel side surfaces of a longitudinally extending elongated opening defined by said surface means of the elongated plate to prevent relative rotation between said fixture and the elongated plate, the lengths of said parallel side surfaces of said mounting portion being less than the lengths of said inner parallel side surfaces of the longitudinally extending elongated opening to permit adjustment of the position of said fixture along the elongated opening.
Claim 10
Dependent Claim
64 words
An apparatus as set forth in claim 6 wherein said outer end portion includes a first flat surface, said mounting end portion includes a second flat surface extending at an acute angle to said first flat surface, the opening in said outer end portion intersecting said first flat surface and having a central axis which extends transversely to said first and second flat surfaces.
References Cited (Backward Citations)
US3242922A
Cited
GB1243353A
Cited
US3693616A
Cited
DE2806414A1
Cited
SU876125A1
Cited
US4493317A
Cited
US4448191A
Cited
US4456005A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-06 | 1990-10-06 | 1991-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-06 | 1994-10-06 | 1995-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-06 | 1998-10-06 | 1999-04-07 | $7700.00 | Window Closed / Lapsed |