Young K Yi

56604017, Aug 26, 1997

Sep 28, 1994

8/315124

Young K. Yi - Brooklyn NY

A63C 1706

280 1122

A skateboard has a row of rollers, with a rear roller of relatively larger diameter for improved ground contact during turning maneuvers. Rollers are pivotally mounted for steer-ability, preferably being mounted on inclined axes for the effecting of turning torque about the axes in desired directions in response to exertion by a person of downward force on selected side portions of the skateboard, whereby improved turning of the rollers in desired directions is provided. A roller may be mounted on a pivotable yoke with the roller mounted on one end portion and a spring retainer on the other, so that upon a roller encountering an obstruction, bump or depression, the roller moves upwardly or downwardly to pivot the retainer against a spring, and impact energy is absorbed. Improved propulsion poles are provided, each pole having a generally transverse handle adapted for improved manual grasping and exertion of downward force against a supporting surface; a deformable pole tip member provides improved engagement with a ground surface in various pole orientations.

20150083983, Mar 26, 2015

Sep 19, 2014

14/491184

Young Kwan Yi - Silver Spring MD, US

H02G 1/06
B65H 57/14

2541343R

A roller guide for supporting and facilitating the manipulation of cable(s) and wire(s) is presented. The roller guide include a frame and a roller assembly disposed along a length of the frame. The roller assembly includes one or more adjacently disposed roller bearings positioned between at least two stop collars. Each of the roller bearings include a housing disposed in a surrounding relation to a corresponding portion of the frame, and a plurality of rollers rotationally disposed within the housing. The rollers include a convex outer engaging surface structured to substantially matingly align with an inner longitudinal concave surface of the corresponding portion of the frame.