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Self-locking spike

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Publication number
US2299308A
US2299308A US40697041A US2299308A US 2299308 A US2299308 A US 2299308A US 40697041 A US40697041 A US 40697041A US 2299308 A US2299308 A US 2299308A
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Prior art keywords
spike
slot
locking
arm
wedge
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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Russell A Creighton
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Russell A Creighton
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS, WEDGES, JOINTS OR JOINTING
    • F16B15/00Nails; Staples
    • F16B15/06Nails; Staples with barbs, e.g. for metal parts; Drive screws

Description

Filed Aug. 15, 1941 'INVENTOR #05554 4. CREE/I70 Patented Oct. 20, 1942 UNITED STATES PATENT OFFICE 4 Claims.

This invention pertains to an improved type of spike, particularly adapted for use as a railroad spike in fastening tracks to ties or other supporting means, the spike of this invention being characterized by the provision of means whereby the spike may be readily driven and automatically anchored or locked into position so that it can not be removed and will resist dislodgment or loosening due to vibration, the stresses of normal use, etc.

Heretofore it has been recognized that railroad spikes have a tendency to work their way loose out of the ties into which they are driven, the holding power of the spike being dependent entirely upon the compressive action of the surrounding timber upon the shank of the spike. Inasmuch as normal spikes become loose, the railroads are forced to employ large numbers of men and constantly patrol the thousands of miles of trackway, inspecting the spikes, driving them home in the event they have worked loose, and replacing many spikes by either removing older spikes or by driving new spikes in new positions so as to permit a new or theretofore unused portion' of the tie to grasp a spike. Only a limited number of spikes may be driven into a tie before the area of the tie adjacent the track is so perforated as to be useless as a holding means for the spike. When this happens, it is necessary to remove the entire tie and start afresh.

Heretofore complex methods and means have been devised in an attempt to solve this difficulty. The present invention is directed toward an improved type of spike which is self-locking and which is actuated by the material into which the spike is driven. If, therefore, the spike is driven into a wooden tie, the wood itself causes the spike to lock itself within the tie so as to effectively resist withdrawal or loosening. By the use of these spikes, a safer road bed is obtained and the necessity for constant inspection does not exist. The life of the tie is prolonged indefinitely since two spikes may be used effectively for a much longer period of time than that normally experienced by the use of even four of the normal spikes heretofore employed.

Generally stated, therefore, the invention pertains to a self-locking spike provided with an extensible locking arm and with means actuated by the material into which the spike is driven for moving the locking arm into extended position beyond the sides of the shank of the spike and for holding the arm in such extended position so as to prevent withdrawal of the spike.

An object of the present invention, therefore, 55

is to disclose and provide a self-locking spike adapted to resist dislodgment.

A further object is to disclose and provide .a railroad spike provided with means adapted to extend in a direction transverse to the axis of the spike into the material into which the spike is driven.

A further object is to provide a self-locking spike including a locking arm adapted to swing outwardly from the spike into the material into which the spike is driven and means for holding the arm in such extended position.

Moreover, an object of the invention is to disclose a self-locking spike which is actuated by the material into which the spike is driven.

Other objects, advantages and uses of the invention will become apparent to those skilled in the art from the following description. In order to facilitate understanding, reference will be had to the appended drawing, in which:

Fig. 1 is a perspective View of one form of spike embraced by this invention, this view showing the locking arm in extended position.

Fig. 2 is a side elevation of the spike.

Fig. 3 is a side elevation of the spike after it has been driven into a tie.

Fig. 4 is an end elevation.

As shown in the drawing, the spike may include a shank It] provided with a head II at one end and a wedge end portion [2 terminating in a sharp edge l3. In the form illustrated, the

shank is provided with four sides 14, I57, 16 and I1. The sides I4 and I5 converge at the lower end to form the sides of the wedge l2. The sides It and H are substantially parallel throughout their length. The length of the edge I3 is therefore equivalent to the base of the wedge.

The shank It is provided with a slot 20 extending from one side to the other. Preferably the slot '20 extends from one of the parallel sides Hi to the other side I1 and is therefore parallel to the edge 13 of the wedge. A bore 2! extends longitudinally of the spike from the edge lit to the bottom of the slot 20.

Pivotally mounted within the upper portion of the slot 20 is a locking arm 22 which may be pivoted as at 23. The locking arm 22 is preferably adapted to rest on the bottom of the slot 20 within such slot, the height of the slot and the length of the arm 22 being such as to permit the locking arm 22 to extend outwardly to an appreciable distance beyond the side l6 of the spike. In the lower portion of the slot a latch dog 24 is provided, pivoted as at 25, such latch dog being adapted to cover the bore 2| in the bottom of the slot and to swing upwardly so as to engage the detents or teeth 26 and 21 formed in the lower surface of the locking arm 22.

When the spike is driven into a wooden tie or other material th inclined faces of the wedge shown in Fig. 3, this column of wood, produced by driving the spike into the tie, raises the latch dog 24 which in turn raises the locking arm 22. As the locking arm 22 is raised, it protrudes beyond the side of the spike and engages the tie. Toward the conclusion of the driving operation the column of wood which is emitted by th bore 2| forces the latch dog 24 into locking engagement with the detents 26 and 21 into th position shown in Fig. 3.

The distance from the edge l3 of the wedge to the bottom of the slot and the height of the slot as Well as the length of the locking arm 22 bear a predetermined and desired ratio to the length of the spik from immediately beneath its head H to the top of the slot 20. These lengths are so proportioned that the locking arm 22 becomes fully extended and locked into extended position just as the spike is driven home, and this is usually attained by making the distance from the head to the top of the slot 20 slightly shorter than the distance from the top of the slot to the edge l3.

The sharpness of the point on arm 22 may in fluenoe th rapidity with which it is extended after it first engages the wood of the tie. If this point on arm 22 is not sharp, the wood column may more fully fill slot 20 before the arm is extended.

Fig. 3 shows the position of the elements when the spike has been fully driven and it is to be observed that the locking arm 22 is fully extended into the wood of the tie and presents a bearing surface which is transverse to the vertical axis of the spike. The spike therefore can not be readily withdrawn since the locking arm 22 is locked in this extended position by the dog 24.

In order to prevent the locking arm and dog 24 from unduly vibrating or accidentally jumping out of the slot 20 during initial driving of a spike, a thin wire or spring may be placed around the arm and dog so as to hold the two together as indicated at 3|. This frangible member 31 is readily broken as soon as the column of wood 30 begins to raise the dog 24.

It will be readily appreciated that these and other changes may be made from the specific construction described in detail hereinabove without departing from the spirit of the invention. All changes and modifications coming within the scope of the appended claims are embraced thereby.

I claim:

1. A self-locking spike comprising: a shank provided with four sides, a head at one end and a wedge-shaped end opposite said head, two of the sides of the shank converging at the wedge to form its edge, the other two sides being substantially parallel throughout their length; a slot extending through the shank from one of said parallel sides to the other in a direction parallel to the edge of the wedge; a longitudinally directed bore from the edge of the wedge to the bottom of said slot; a locking arm pivotally mounted in the slot and adapted to swing outwardly from within the slot to beyond the sides of the shank; and a latch dog pivotally mounted in the lower portion of the slot and extending over said bore, said dog being adapted to swing upwardly to engage said locking arm and hold the same in extended position.

2. A self-locking spike comprising: a shank provided with four sides, a head at one end and a wedge-shaped end opposite said head, two of the sides of the shank converging at the wedge to form its edge, the other two sides being substantially parallel throughout their length; a slot extending through the shank from one of said parallel sides to th other in a direction parallel to the edge of the wedge; a longitudinally directed bore from the edge of the wedge to the bottom of said slot; a locking arm pivotally mounted in the slot and adapted to swing outwardly from within the slot to beyond the sides of the shank; and means actuated by material into which the spike is driven, said material extending through said bore, for moving the locking arm into extended position and for holding the same in such extended position.

3. A self-locking spike comprising: a shank provided with four sides, a head at one end and a wedge-shaped end opposite said head; a slot extending through the shank in a direction parallel to the edge of the wedge; a longitudinally directed bore from the edge of the wedge to the bottom of said slot; a locking arm pivotally mounted in the slot and adapted to swing outwardly from within the slot to beyond the side of the shank; and means movably positioned within the slot and actuated by material into which the spike is driven, said material extending through said bore, for moving the locking arm into extended position and for holding the same in such extended position.

4. A self-locking spike comprising: a shank provided with four sides, a head at one end and a wedge-shaped end opposite said head; a slot extending through the shank in a direction parallel to the edge of the wedge; a longitudinally directed bore from the edge of the wedge to the bottom of said slot; a locking arm pivotally mounted in the slot and adapted to swing outwardly from Within the slot to beyond the side of the shank; detent means formed in the lower surface of the locking arm; and a latch dog pivotally mounted in the lower portion of the slot and extending over said bore, said dog being

US2299308A 1941-08-15 1941-08-15 Self-locking spike Expired - Lifetime US2299308A (en)

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Cited By (52)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4348790A (en) * 1978-12-28 1982-09-14 Nisso Industries Co. Ltd. Locking device
US4508479A (en) * 1981-07-07 1985-04-02 Georg Mez Device for pulling together
US20060204349A1 (en) * 2003-06-30 2006-09-14 Master Lock Company Integrated pin and clip
US20070043362A1 (en) * 2005-02-17 2007-02-22 Malandain Hugues F Percutaneous spinal implants and methods
US20080081896A1 (en) * 2006-09-28 2008-04-03 Helmut-Werner Heuer (Co)polycarbonates having improved adhesion to metals
US7846186B2 (en) 2005-06-28 2010-12-07 Kyphon SÀRL Equipment for surgical treatment of two vertebrae
US7879104B2 (en) 2006-11-15 2011-02-01 Warsaw Orthopedic, Inc. Spinal implant system
US7901432B2 (en) 1997-01-02 2011-03-08 Kyphon Sarl Method for lateral implantation of spinous process spacer
US7931674B2 (en) 2005-03-21 2011-04-26 Kyphon Sarl Interspinous process implant having deployable wing and method of implantation
US7955392B2 (en) 2006-12-14 2011-06-07 Warsaw Orthopedic, Inc. Interspinous process devices and methods
US7959652B2 (en) 2005-04-18 2011-06-14 Kyphon Sarl Interspinous process implant having deployable wings and method of implantation
US7988709B2 (en) 2005-02-17 2011-08-02 Kyphon Sarl Percutaneous spinal implants and methods
US7993374B2 (en) 1997-01-02 2011-08-09 Kyphon Sarl Supplemental spine fixation device and method
US8007521B2 (en) 2005-02-17 2011-08-30 Kyphon Sarl Percutaneous spinal implants and methods
US8007537B2 (en) 2002-10-29 2011-08-30 Kyphon Sarl Interspinous process implants and methods of use
US8029567B2 (en) 2005-02-17 2011-10-04 Kyphon Sarl Percutaneous spinal implants and methods
US8034079B2 (en) 2005-04-12 2011-10-11 Warsaw Orthopedic, Inc. Implants and methods for posterior dynamic stabilization of a spinal motion segment
US8034080B2 (en) 2005-02-17 2011-10-11 Kyphon Sarl Percutaneous spinal implants and methods
US8038698B2 (en) 2005-02-17 2011-10-18 Kphon Sarl Percutaneous spinal implants and methods
US8043378B2 (en) 2006-09-07 2011-10-25 Warsaw Orthopedic, Inc. Intercostal spacer device and method for use in correcting a spinal deformity
US8048118B2 (en) 2006-04-28 2011-11-01 Warsaw Orthopedic, Inc. Adjustable interspinous process brace
US8048117B2 (en) 2003-05-22 2011-11-01 Kyphon Sarl Interspinous process implant and method of implantation
US8048119B2 (en) 2006-07-20 2011-11-01 Warsaw Orthopedic, Inc. Apparatus for insertion between anatomical structures and a procedure utilizing same
US8057513B2 (en) 2005-02-17 2011-11-15 Kyphon Sarl Percutaneous spinal implants and methods
US8070778B2 (en) 2003-05-22 2011-12-06 Kyphon Sarl Interspinous process implant with slide-in distraction piece and method of implantation
US8083795B2 (en) 2006-01-18 2011-12-27 Warsaw Orthopedic, Inc. Intervertebral prosthetic device for spinal stabilization and method of manufacturing same
US8097018B2 (en) 2005-02-17 2012-01-17 Kyphon Sarl Percutaneous spinal implants and methods
US8096994B2 (en) 2005-02-17 2012-01-17 Kyphon Sarl Percutaneous spinal implants and methods
US8100943B2 (en) 2005-02-17 2012-01-24 Kyphon Sarl Percutaneous spinal implants and methods
US8105358B2 (en) 2008-02-04 2012-01-31 Kyphon Sarl Medical implants and methods
US8114136B2 (en) 2008-03-18 2012-02-14 Warsaw Orthopedic, Inc. Implants and methods for inter-spinous process dynamic stabilization of a spinal motion segment
US8114132B2 (en) 2010-01-13 2012-02-14 Kyphon Sarl Dynamic interspinous process device
US8114131B2 (en) 2008-11-05 2012-02-14 Kyphon Sarl Extension limiting devices and methods of use for the spine
US8118839B2 (en) 2006-11-08 2012-02-21 Kyphon Sarl Interspinous implant
US8118844B2 (en) 2006-04-24 2012-02-21 Warsaw Orthopedic, Inc. Expandable device for insertion between anatomical structures and a procedure utilizing same
US8128663B2 (en) 1997-01-02 2012-03-06 Kyphon Sarl Spine distraction implant
US8147526B2 (en) 2010-02-26 2012-04-03 Kyphon Sarl Interspinous process spacer diagnostic parallel balloon catheter and methods of use
US8147548B2 (en) 2005-03-21 2012-04-03 Kyphon Sarl Interspinous process implant having a thread-shaped wing and method of implantation
US8157841B2 (en) 2005-02-17 2012-04-17 Kyphon Sarl Percutaneous spinal implants and methods
US8157842B2 (en) 2009-06-12 2012-04-17 Kyphon Sarl Interspinous implant and methods of use
US8226653B2 (en) 2005-04-29 2012-07-24 Warsaw Orthopedic, Inc. Spinous process stabilization devices and methods
US8262698B2 (en) 2006-03-16 2012-09-11 Warsaw Orthopedic, Inc. Expandable device for insertion between anatomical structures and a procedure utilizing same
US8317831B2 (en) 2010-01-13 2012-11-27 Kyphon Sarl Interspinous process spacer diagnostic balloon catheter and methods of use
US8349013B2 (en) 1997-01-02 2013-01-08 Kyphon Sarl Spine distraction implant
US8372117B2 (en) 2009-06-05 2013-02-12 Kyphon Sarl Multi-level interspinous implants and methods of use
US8591548B2 (en) 2011-03-31 2013-11-26 Warsaw Orthopedic, Inc. Spinous process fusion plate assembly
US8591549B2 (en) 2011-04-08 2013-11-26 Warsaw Orthopedic, Inc. Variable durometer lumbar-sacral implant
US8641762B2 (en) 2006-10-24 2014-02-04 Warsaw Orthopedic, Inc. Systems and methods for in situ assembly of an interspinous process distraction implant
US8679161B2 (en) 2005-02-17 2014-03-25 Warsaw Orthopedic, Inc. Percutaneous spinal implants and methods
US8771317B2 (en) 2009-10-28 2014-07-08 Warsaw Orthopedic, Inc. Interspinous process implant and method of implantation
US8814908B2 (en) 2010-07-26 2014-08-26 Warsaw Orthopedic, Inc. Injectable flexible interspinous process device system
US8888816B2 (en) 2003-05-22 2014-11-18 Warsaw Orthopedic, Inc. Distractible interspinous process implant and method of implantation

Cited By (70)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4348790A (en) * 1978-12-28 1982-09-14 Nisso Industries Co. Ltd. Locking device
US4508479A (en) * 1981-07-07 1985-04-02 Georg Mez Device for pulling together
US7993374B2 (en) 1997-01-02 2011-08-09 Kyphon Sarl Supplemental spine fixation device and method
US8349013B2 (en) 1997-01-02 2013-01-08 Kyphon Sarl Spine distraction implant
US8821548B2 (en) 1997-01-02 2014-09-02 Warsaw Orthopedic, Inc. Spine distraction implant and method
US8740943B2 (en) 1997-01-02 2014-06-03 Warsaw Orthopedic, Inc. Spine distraction implant and method
US8568454B2 (en) 1997-01-02 2013-10-29 Warsaw Orthopedic, Inc. Spine distraction implant and method
US7901432B2 (en) 1997-01-02 2011-03-08 Kyphon Sarl Method for lateral implantation of spinous process spacer
US7918877B2 (en) 1997-01-02 2011-04-05 Kyphon Sarl Lateral insertion method for spinous process spacer with deployable member
US8568455B2 (en) 1997-01-02 2013-10-29 Warsaw Orthopedic, Inc. Spine distraction implant and method
US7955356B2 (en) 1997-01-02 2011-06-07 Kyphon Sarl Laterally insertable interspinous process implant
US8672975B2 (en) * 1997-01-02 2014-03-18 Warsaw Orthopedic, Inc Spine distraction implant and method
US8617211B2 (en) 1997-01-02 2013-12-31 Warsaw Orthopedic, Inc. Spine distraction implant and method
US8128663B2 (en) 1997-01-02 2012-03-06 Kyphon Sarl Spine distraction implant
US8007537B2 (en) 2002-10-29 2011-08-30 Kyphon Sarl Interspinous process implants and methods of use
US8888816B2 (en) 2003-05-22 2014-11-18 Warsaw Orthopedic, Inc. Distractible interspinous process implant and method of implantation
US8070778B2 (en) 2003-05-22 2011-12-06 Kyphon Sarl Interspinous process implant with slide-in distraction piece and method of implantation
US8048117B2 (en) 2003-05-22 2011-11-01 Kyphon Sarl Interspinous process implant and method of implantation
US20060204349A1 (en) * 2003-06-30 2006-09-14 Master Lock Company Integrated pin and clip
US7988709B2 (en) 2005-02-17 2011-08-02 Kyphon Sarl Percutaneous spinal implants and methods
US8034080B2 (en) 2005-02-17 2011-10-11 Kyphon Sarl Percutaneous spinal implants and methods
US8038698B2 (en) 2005-02-17 2011-10-18 Kphon Sarl Percutaneous spinal implants and methods
US8157841B2 (en) 2005-02-17 2012-04-17 Kyphon Sarl Percutaneous spinal implants and methods
US8029567B2 (en) 2005-02-17 2011-10-04 Kyphon Sarl Percutaneous spinal implants and methods
US8007521B2 (en) 2005-02-17 2011-08-30 Kyphon Sarl Percutaneous spinal implants and methods
US8679161B2 (en) 2005-02-17 2014-03-25 Warsaw Orthopedic, Inc. Percutaneous spinal implants and methods
US8057513B2 (en) 2005-02-17 2011-11-15 Kyphon Sarl Percutaneous spinal implants and methods
US7998174B2 (en) 2005-02-17 2011-08-16 Kyphon Sarl Percutaneous spinal implants and methods
US8454693B2 (en) 2005-02-17 2013-06-04 Kyphon Sarl Percutaneous spinal implants and methods
US8097018B2 (en) 2005-02-17 2012-01-17 Kyphon Sarl Percutaneous spinal implants and methods
US8096994B2 (en) 2005-02-17 2012-01-17 Kyphon Sarl Percutaneous spinal implants and methods
US8100943B2 (en) 2005-02-17 2012-01-24 Kyphon Sarl Percutaneous spinal implants and methods
US20070043362A1 (en) * 2005-02-17 2007-02-22 Malandain Hugues F Percutaneous spinal implants and methods
US8221458B2 (en) 2005-02-17 2012-07-17 Kyphon Sarl Percutaneous spinal implants and methods
US8167890B2 (en) 2005-02-17 2012-05-01 Kyphon Sarl Percutaneous spinal implants and methods
US8147516B2 (en) 2005-02-17 2012-04-03 Kyphon Sarl Percutaneous spinal implants and methods
US7931674B2 (en) 2005-03-21 2011-04-26 Kyphon Sarl Interspinous process implant having deployable wing and method of implantation
US8591546B2 (en) 2005-03-21 2013-11-26 Warsaw Orthopedic, Inc. Interspinous process implant having a thread-shaped wing and method of implantation
US8147548B2 (en) 2005-03-21 2012-04-03 Kyphon Sarl Interspinous process implant having a thread-shaped wing and method of implantation
US8034079B2 (en) 2005-04-12 2011-10-11 Warsaw Orthopedic, Inc. Implants and methods for posterior dynamic stabilization of a spinal motion segment
US8109972B2 (en) 2005-04-18 2012-02-07 Kyphon Sarl Interspinous process implant having deployable wings and method of implantation
US8128702B2 (en) 2005-04-18 2012-03-06 Kyphon Sarl Interspinous process implant having deployable wings and method of implantation
US7959652B2 (en) 2005-04-18 2011-06-14 Kyphon Sarl Interspinous process implant having deployable wings and method of implantation
US8226653B2 (en) 2005-04-29 2012-07-24 Warsaw Orthopedic, Inc. Spinous process stabilization devices and methods
US7846186B2 (en) 2005-06-28 2010-12-07 Kyphon SÀRL Equipment for surgical treatment of two vertebrae
US8083795B2 (en) 2006-01-18 2011-12-27 Warsaw Orthopedic, Inc. Intervertebral prosthetic device for spinal stabilization and method of manufacturing same
US8262698B2 (en) 2006-03-16 2012-09-11 Warsaw Orthopedic, Inc. Expandable device for insertion between anatomical structures and a procedure utilizing same
US8118844B2 (en) 2006-04-24 2012-02-21 Warsaw Orthopedic, Inc. Expandable device for insertion between anatomical structures and a procedure utilizing same
US8048118B2 (en) 2006-04-28 2011-11-01 Warsaw Orthopedic, Inc. Adjustable interspinous process brace
US8048119B2 (en) 2006-07-20 2011-11-01 Warsaw Orthopedic, Inc. Apparatus for insertion between anatomical structures and a procedure utilizing same
US8043378B2 (en) 2006-09-07 2011-10-25 Warsaw Orthopedic, Inc. Intercostal spacer device and method for use in correcting a spinal deformity
US20080081896A1 (en) * 2006-09-28 2008-04-03 Helmut-Werner Heuer (Co)polycarbonates having improved adhesion to metals
US8641762B2 (en) 2006-10-24 2014-02-04 Warsaw Orthopedic, Inc. Systems and methods for in situ assembly of an interspinous process distraction implant
US8118839B2 (en) 2006-11-08 2012-02-21 Kyphon Sarl Interspinous implant
US7879104B2 (en) 2006-11-15 2011-02-01 Warsaw Orthopedic, Inc. Spinal implant system
US7955392B2 (en) 2006-12-14 2011-06-07 Warsaw Orthopedic, Inc. Interspinous process devices and methods
US8105358B2 (en) 2008-02-04 2012-01-31 Kyphon Sarl Medical implants and methods
US8317832B2 (en) 2008-03-18 2012-11-27 Warsaw Orthopedic, Inc. Implants and methods for inter-spinous process dynamic stabilization of spinal motion segment
US8114136B2 (en) 2008-03-18 2012-02-14 Warsaw Orthopedic, Inc. Implants and methods for inter-spinous process dynamic stabilization of a spinal motion segment
US8114131B2 (en) 2008-11-05 2012-02-14 Kyphon Sarl Extension limiting devices and methods of use for the spine
US8372117B2 (en) 2009-06-05 2013-02-12 Kyphon Sarl Multi-level interspinous implants and methods of use
US8157842B2 (en) 2009-06-12 2012-04-17 Kyphon Sarl Interspinous implant and methods of use
US8771317B2 (en) 2009-10-28 2014-07-08 Warsaw Orthopedic, Inc. Interspinous process implant and method of implantation
US8114132B2 (en) 2010-01-13 2012-02-14 Kyphon Sarl Dynamic interspinous process device
US8317831B2 (en) 2010-01-13 2012-11-27 Kyphon Sarl Interspinous process spacer diagnostic balloon catheter and methods of use
US8147526B2 (en) 2010-02-26 2012-04-03 Kyphon Sarl Interspinous process spacer diagnostic parallel balloon catheter and methods of use
US8840617B2 (en) 2010-02-26 2014-09-23 Warsaw Orthopedic, Inc. Interspinous process spacer diagnostic parallel balloon catheter and methods of use
US8814908B2 (en) 2010-07-26 2014-08-26 Warsaw Orthopedic, Inc. Injectable flexible interspinous process device system
US8591548B2 (en) 2011-03-31 2013-11-26 Warsaw Orthopedic, Inc. Spinous process fusion plate assembly
US8591549B2 (en) 2011-04-08 2013-11-26 Warsaw Orthopedic, Inc. Variable durometer lumbar-sacral implant

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