Shield for vehicle shock absorber

Abstract

A shield is slidably mounted to a cylinder of a shock absorber and fastened to a piston shaft of the shock absorber. The shield may include a circumferential slot that fits over a disk formed on the piston shaft to secure the shield to the piston shaft. The shield may include a partial cylinder that extends over a point of entry of the piston shaft into the cylinder. For example, the shield may have a cross section that is a 200 to 270 degree arc. The shield may include a guide along an interior surface that engages a slider secured to the cylinder. The guide may be a slot and the slider is a post seated in the slot.

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows: 
     
         1 . An apparatus comprising:
 a shell having an inner surface having a shape defining a cylinder having a diameter (D) and an axis, the shell having a length that is at least three times larger than the diameter (D);   a cap secured at one end of the shell and defining an aperture for receiving a piston shaft of a shock absorber;   a guide secured to the shell and extending away from the inner surface; and   a slider configured to engage the guide and slide relative to the guide parallel to the axis,   wherein the shell and cap are formed of an impact resistant material including at least one of resin and plastic.   
     
     
         2 . The apparatus of  claim 1 , wherein the guide is a slot extending outwardly from the inner surface. 
     
     
         3 . The apparatus of  claim 1 , further comprising a fastening structure secured to the cap and configured to secure the cap to the piston shaft. 
     
     
         4 . The apparatus of  claim 3 , wherein the fastening structure comprises a circumferential slot surrounding an opening and sized to receive a disk secured to the piston shaft. 
     
     
         5 . The apparatus of  claim 4 , wherein the shell, cap, opening, and circumferential slot occupy only an angular region defined with respect to the axis, the angular region being between 200 and 270 degrees. 
     
     
         6 . The apparatus of  claim 1 , wherein the shell, cap, and guide are co-molded from a rigid yet impact resistant material including at least one of polyurethane, high density polyethylene resin, and nylon. 
     
     
         7 . An apparatus comprising:
 a first cylinder;   a piston shaft slidably secured to the first cylinder and extending outwardly from the first cylinder;   a slider secured to the first cylinder;   a shield comprising:
 a shell having an inner surface having a shape defining a second cylinder having a diameter (D) and an axis, the shell having a length that is at least three times larger than the diameter (D), the diameter (D) sized such that the shell fits around the second cylinder; 
   a cap secured at one end of the shell and defining an aperture for receiving a piston shaft of a shock absorber; and   a guide extending along the inner surface parallel to the axis, the slider being slidably engaged with the guide, the guide being a slot defined by the shell and extending outwardly from the inner surface, the slider being sized to insert within the slot,   wherein the shell and cap are formed of an impact resistant material including at least one of resin and plastic.   
     
     
         8 . The apparatus of  claim 7 , wherein the slider comprises a base, the slider including a post secured to the base, the base defining a structure for securing to the first cylinder. 
     
     
         9 . The apparatus of  claim 8 , wherein the structure comprises a opening in the base, the apparatus further comprising a band encircling the first cylinder and passing through the opening. 
     
     
         10 . The apparatus of  claim 9 , wherein the band is a zip tie. 
     
     
         11 . The apparatus of  claim 9 , further comprising a fastening structure secured to the cap and configured to secure the cap to the piston shaft. 
     
     
         12 . The apparatus of  claim 11 , wherein the fastening structure comprises a circumferential slot surrounding the opening and sized to receive a disk secured to the piston shaft. 
     
     
         13 . The apparatus of  claim 12 , wherein the shell, cap, opening, and circumferential slot occupy only an angular region defined with respect to the axis, the angular region being between 200 and 270 degrees. 
     
     
         14 . The apparatus of  claim 11 , wherein the shell, cap, and guide are co-molded from a rigid yet impact resistant material including at least one of polyurethane, high density polyethylene resin, and nylon.