A steerable roller skate includes: a sole member of a skate boot or strap of roller skate having a pair of rear wheels transversely rotatably secured to a rear bottom portion of the sole member, a steering base steerably secured on a front bottom portion of the sole member, a pair of front wheels transversely rotatably secured on the steering base, a first magnet secured on a central bottom portion of the sole member, and a second magnet secured on the steering base adjacent to the first magnet having opposite magnetic polarities of the first and second magnets for normally attracting the second magnet to the first magnet for magnetically restoring the steering base and the front wheels for automatically resetting a straightforward orientation of the roller skate.

BACKGROUND OF THE INVENTION 
U.S. Pat. No. 5,441,287 issued to the same inventor of this application 
disclosed a stabilizing disk mounted on an intermediate bottom portion of 
the sole member for frictionally contacting a rear base portion of the 
steering base steerably secured on a front bottom portion of the sole 
member for stabilizing the steering base when biasing the steering base in 
different directions for enhancing skate safety. 
Due to the frictional contacting between the stabilizing disk and the 
steering base, the front wheels (3) and the steeering base (25), once 
being biased rightwardly or leftwardly, will not be automatically restored 
to allow the front axle (31) to be projectively perpendicular to the 
longitudinal axis (10) longitudinally defined at a central portion of the 
sole member (1) when the skater lifts his or her foot during the skating, 
possibly confusing the skating orientations and influencing the 
maneuverability of the skater. 
The present inventor has found the drawbacks of the U.S. Pat. No. 5,441,287 
and invented the steerable roller skate which is magnetically restorable. 
SUMMARY OF THE INVENTION 
The object of the present invention is to provide a steerable roller skate 
including: a sole member of a skate boot or strap of roller skate having a 
pair of rear wheels transversely rotatably secured to a rear bottom 
portion of the sole member, a steering base steerably secured on a front 
bottom portion of the sole member, a pair of front wheels transversely 
rotatably secured on the steering base, a first magnet secured on a 
central bottom portion of the sole member, and a second magnet secured on 
the steering base adjacent to the first magnet having opposite magnetic 
polarities of the first and second magnets for normally attracting the 
second magnet to the first magnet for magnetically restoring the steering 
base and the front wheels for automatically resetting a straightforward 
orientation of the roller skate.

DETAILED DESCRIPTION 
As shown in the drawing figures, a preferred embodiment of the roller skate 
of the present invention comprises: a sole member 1 of a skate boot or 
fastening strap 11 of a roller skate defining a longitudinal axis 10 at a 
longitudinal center of the sole member 1, a steering means 2 steerably 
secured to a front bottom portion of the sole member 1, a pair of front 
wheels 3 rotatably transversely secured on the steering means 2 by a front 
axle 31, a pair of rear wheels 5 rotatably transversely secured to a rear 
bottom portion of the sole member 1, a first magnet 4a secured on a 
central bottom portion 12 of the sole member 1, and a second magnet 4b 
secured on the steering means 2. The pair of rear wheels 5 are rotatably 
secured on a rear axle 51, generally perpendicular to the longitudinal 
axis 10 of the sole member 1. 
The steering means 2 includes: a steering base 25 having a front base 
portion 25a drilled with a vertical bolt hole for rotatably engaging a 
front bolt 21 vertically secured in a front bottom portion of the sole 
member 1 about a front vertical axis 20, an axle hole horizontally 
transversely formed through a middle portion of the steering base 25 for 
rotatably engaging a front axle 31 for rotatably securing the pair of 
front wheels 3 on the steering base 25, and a rear extension portion 25f 
formed on a rear portion of the steering base 25. The vertical axis 20 of 
the bolt 21 is projectively perpendicular to the longitudinal axis 10 of 
the sole member 1. 
The first magnet 4a secured on the central bottom portion 12 of the sole 
member 1 has a magnetic polarity opposite to a magnetic polarity of the 
second magnet 4b secured on the rear extension portion 25f of the steering 
base 25 for a mutual magnetic attraction between the first and second 
magnets 4a, 4b. 
Naturally, the first magnet 4a may be attracted to a ferrous plate (not 
numbered) secured to the bottom 12 of the sole member 1 to substitute the 
second magnet 4b for a mutual magnetic attraction between the first magnet 
4a and the ferrous plate. 
The bottom portion 12 of the sole member 1 and the steering base 25 may be 
made of non-ferrous materials for preventing loss of magnetic property of 
the magnets 4a, 4b. 
The steering base 25 further includes a limiting projection 25d protruding 
upwardly from a central portion of the steering base 25 to be retarded by 
a pair of stoppers 29 respectively disposed on two opposite side portions 
on a front bottom portion of the sole member 1 to prevent falling off of a 
skate player when rightwardly or leftwardly steering a roller skate of the 
present invention. 
The first magnet 4a has a center aligned with the longitudinal axis 10 of 
the sole member 1. The second magnet 4b secured on the steering base 25 is 
positioned corresponding to and adjacent to the first magnet 4a to define 
an aperture A between the first and second magnets 4a, 4b. 
The shapes of the two magnets 4a, 4b are not limited in the present 
invention and are preferably rectangular shaped. 
The fixing or joining methods for securing the two magnets on the skate are 
not limited in this invention. 
Upon a skating by a player, the front wheels 3 may be biased sidewardly as 
shown in FIG. 3 to forcibly move the second magnet 4b from the first 
magnet 4a for diviating the skating direction from a straightforward 
direction aligned with the longitudinal axis 10 to a sideward orientation 
as shown in the arrow direction in FIG. 3. 
Then, the player lifts his foot for a next skating step, the magnetic 
attraction between the two magnets 4a, 4b will automatically restore the 
steering base 25 to allow the front axis 31 to be perpendicular to the 
longitudinal axis 10 of the sole member for resetting a straightforward 
direction, ready for next biasing movement either rightwardly or 
leftwardly. 
Therefore, the present invention is superior to the U.S. Pat. No. 5,441,287 
for automatically restoring or resetting the front wheels for an initial 
straightforward skating orientation for enhancing safety and 
maneuverability. 
The present invention may be modified without departing from the spirit and 
scope of the invention.