Expandable screw apparatus and method thereof

Claim 2

An expandable screw apparatus, comprising: an outer screw having a longitudinal hollow core and a plurality of longitudinal expandable slits proximate a distal end; an inner screw, disposed inside the longitudinal hollow core of the outer screw, having a distal end extended outside the longitudinal hollow core of the outer screw; said inner screw is threaded with one of a right handed orientation or a left handed orientation on an outer surface, and having opposite orientation to an outer surface of said outer screw; and an end nut, engaged with the distal end of the inner screw, wherein by rotating the outer screw relative to the inner screw while simultaneously holding the inner screw, the end nut is drawn into the hollow core of the outer screw, thereby causing simultaneous expansion of the expandable slits in a transversal direction.

Claim 3

The expandable screw apparatus of claim 1 , further comprising a driver mechanism, wherein the driver mechanism includes a first driver which drives the outer screw and a second driver which drives the inner screw.

Claim 4

An expandable screw apparatus according to claim 1 , wherein said longitudinal hollow core of said outer screw comprises a smooth surface.

Claim 5

An expandable screw apparatus according to claim 2 , wherein a proximal end of said outer screw comprises a structural head for attachment to said first driver and having a longitudinal hole region in a longitudinal direction towards a stop region.

Claim 6

An expandable screw apparatus according to claim 4 , wherein said structural head comprises through holes for support of a structural frame, said through holes are in a direction transverse to said longitudinal hole region of said structural head.

Claim 7

An expandable screw apparatus according to claim 1 , wherein said longitudinal expandable slits comprise silts spaced 90° apart.

Claim 8

An expandable screw apparatus according to claim 1 , wherein said outer screw is threaded wit one of a right handed orientation or a left handed orientation on an outer surface.

Claim 9

An expandable screw apparatus according to claim 1 , wherein said inner screw includes a proximal end, said proximal end including a proximal end cap wit a diameter greater than a diameter of a remaining portion of said inner screw and a diameter of said longitudinal hollow core, said inner screw is insertable through a proximal end of said outer screw and said longitudinal hollow core of said outer screw towards said distal end of said outer screw to a point where said proximal end cap contacts a stop region of said outer screw.

Claim 10

An expandable screw apparatus according to claim 8 , wherein said proximal end cap of said inner screw has a diameter less than a diameter of said longitudinal hole region of said outer screw.

Claim 11

An expandable screw apparatus according to claim 8 , wherein said proximal end cap comprises an insertion space allowing connection to a stabilizing member.

Claim 12

An expandable screw apparatus according to claim 1 , wherein said end nut comprises a lip protrusion on a side surface of said end nut.

Claim 13

An expandable screw apparatus according to claim 1 , wherein said end nut comprises a first end and a second end where said first end includes a first diameter less than a second diameter of said second end.

Claim 14

An expandable screw apparatus according to claim 12 , wherein said end nut is a truncated conical shape.

Claim 15

A driving and expanding assembly comprising: an expandable screw apparatus including an outer screw having a longitudinal hallow core and a plurality of longitudinal expandable slits proximate a distal end; an inner screw, disposed inside the longitudinal hollow core of the outer screw, having a distal end extended outside the longitudinal hollow core of the outer strew; said inner screw is threaded with one of a right handed orientation or a left handed orientation and on an outer surface and having opposite orientation of an outer surface of said outer screw; and an end nut, engaged with the distal end of the inner strew, wherein by rotating the outer screw relative to the inner screw while simultaneously holding the inner screw, the end nut is drawn into the hollow core of the outer screw, thereby causing simultaneous expansion of the expandable slits in a transversal direction; a driver mechanism with a structural end connectable to a structural head of said outer screw, said driver having a hollow shaft; and an elongated stabilizing member including an end insertable first through said hollow shaft of said driver mechanism towards a proximal end of said outer screw and through a hole region of said outer screw, said elongated stabilizing member being connectable to an insertion space of a proximal end cap of said inner screw.

Claim 16

A driving and expanding assembly comprising: an expandable screw apparatus including an outer screw having a longitudinal hallow core and a plurality of longitudinal expandable slits proximate a distal end; an inner screw, disposed inside the longitudinal hollow core of the outer screw, having a distal end extended outside the longitudinal hollow core of the outer strew; said inner screw is threaded with one of a right handed orientation or a left handed orientation and on an outer surface and having opposite orientation of an outer surface of said outer screw; and an end nut, engaged with the distal end of the inner strew, wherein by rotating the outer screw relative to the inner screw while simultaneously holding the inner screw, the end nut is drawn into the hollow core of the outer screw, thereby causing simultaneous expansion of the expandable slits in a transversal direction; a driver mechanism with a structural end connectable to a structural head of said outer screw, said driver having a hollow shaft; and an elongated stabilizing member including an end insertable first through said hollow shaft of said driver mechanism towards a proximal end of said outer screw and through a hole region of said outer screw, said elongated stabilizing member being connectable to an insertion space of a proximal end cap of said inner screw.

Claim 17

A driving and expanding assembly according to claim 14 , wherein a surface of said longitudinal hollow core of said outer screw comprises a smooth surface.

Claim 18

A driving and expanding assembly according to claim 14 , wherein said structural head comprises through holes for support of a structural frame, said through holes are in a direction transverse to said longitudinal hole region of said structural head.

Claim 19

A driving and expanding assembly according to claim 14 wherein said longitudinal slits comprises slits spaced 90° span.

Claim 20

A driving and expanding assembly according to claim 14 wherein said outer screw is threaded wit one of a right handed orientation or a left handed orientation.

Claim 21

A driving and expanding assembly according to claim 14 wherein said end nut comprises a first end and a second end where said first end includes a first diameter less than a second diameter of said second end.

Claim 22

A driving and expanding assembly according to claim 19 wherein said end nut is a truncated conical shape.

Claim 23

A driving and expanding assembly according to claim 14 , wherein said elongated stabilizing member is a T-handle allen wrench.

Claim 24

A driving and expanding assembly according to claim 14 , comprising an elongated centering member insertable into said hollow shaft of said driving mechanism to a second inner stop before said distal head of said driving mechanism, said elongated centering member having a longitudinal through hole allowing centering of said elongated stabilizing member to be connected to said insertion space of said inner screw.

Claim 25

A driving and expanding assembly according to claim 22 , wherein said elongated centering member is a cylindrical shape.