Patent Publication Number: US-11376487-B1

Title: Roller skate trucks

Description:
FIELD OF THE INVENTION 
     The present invention relates roller skates and to roller skate trucks. 
     BACKGROUND TO THE INVENTION 
     Roller skating is a popular past time by both children and adults. Besides simply skating around it is also popular to do tricks with roller skates so much so that there are numerous roller skate parks around the world. 
     The truck of a roller skate is the piece, typically made of metal, that the wheel axle passes through. The trucks attach to the plate and hold the wheels. You can tighten or loosen the trucks tension nut to vary the amount of control you want in your pair of skates. The average skater will have their trucks tightly fitted to the boot. 
     A bolt that holds the wheels in place, allowing slight turns as you lean left or right while skating. It acts like a suspension with firm suspension best for racing, while soft suspension is best for luxury and comfort. 
     The truck is the element that offers the widest range of options as concerns shocks, twists, and overall absorption. Experienced skaters discuss the differences in performance with an expert before purchasing, as subtle changes can make a big difference both in terms of feel and performance. 
     A wider trucks means one can perform certain tricks such as grinds (along the length of the skate rather than sideways slides on the block), The wider surface also helps with stability and being able to land on the coping sideways. 
     It is an object of this invention is to provide for an interchangeable axle housing that can be easily removed from the truck body. 
     SUMMARY OF THE INVENTION 
     In one form of the invention there is proposed a boss for use with a roller skate and attached to a king pin of the roller skate and adapted to removably support an axle housing. 
     In preference the boss includes a pivot pin adaptor having an adjustable pin fixed into place by a lock nut. 
     Preferably the pivot pin adaptor includes a shoulder internally abutting the boss. 
     Preferably the boss includes two threaded apertures, the axle housing including two co-axial holes aligned with the threaded apertures to enable screws to attach the axle housing to the boss. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Preferred features, embodiments and variations of the invention may be discerned from the following Detailed Description which provides sufficient information for those skilled in the art to perform the invention. The Detailed Description is not to be regarded as limiting the scope of the preceding Summary of the Invention in any way. The Detailed Description will refer to several drawings as follows. 
         FIG. 1  illustrates a boss with engaging the pivot pin adaptor; 
         FIG. 2  is the same as  FIG. 1  but in a different orientation; 
         FIG. 3  illustrates the boss and pivot pin adaptor disassembled; 
         FIG. 4  is another view of the boss and pivot pin adaptor; 
         FIG. 5  is a close-up view of the pin adaptor; and 
         FIG. 6  is a view of the axle housing. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     The following detailed description of the invention refers to the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings and the following description to refer to the same and like parts. Dimensions of certain parts shown in the drawings may have been modified and/or exaggerated for the purposes of clarity or illustration. 
     As illustrated in the Figures, a roller skate  10  includes a shoe  12 , wheels  14  that are supported by an axle  16  and locked into place using nuts  18 . The axle forms part of an axle housing that includes hanger  20  including two apertures  22  that are not threaded. 
     A boss  24  includes threaded holes  26  and screws  28  pass through the hanger apertures  22  and engage the holes  26  to lock the axle hanger and hangar to the boss. The boss engages a king pin through aperture  30  extending from the roller skate (not shown) as is well known in the art and it is not intended to describe those features that are well known. 
     Pin adaptor  32  engages the boss with a hole  34  coaxially aligned with two threaded apertures  36  in the boss  24  using a screw  44 . The adaptor includes a shoulder  38  that internally abuts the boss  24 . The pin adaptor includes an adjustable pin  40  secured to the adaptor  32  by engaging another threaded hole  42  and locked in a position using lock nut  44 . The pivot pin in its pivot pin adaptor has a lock nut  44  which allows it to adjust in the pivot pin adaptor  32 . This pivot pin adaptor part can be designed in two different shapes, one with a steep angle and one with a shallow angle. Commonly it will be supplied with a shallow angle adaptor, it is uncommon for it to be steep. 
     The reader should now start to appreciate the present invention. Part of the benefit of this design is that the axle housing is detachable from the boss when installed on the roller skates and you can introduce a wider axle housing without requiring significant dismantling of the roller skate. 
     The present invention facilitates bringing a wider truck onto an existing roller skate plate. A standard width truck to roller skate is typically 50 mm—the standard width that one buys off the shelf is a 50 mm truck. The truck is the entire element of boss and axle together. 
     On the pivot pin adapter, the purpose of having a shallow and steep angles is that the king pin of trucks can be anywhere between 7 and 15 degrees and 20 and 31 degrees even. Common graduations are 7, 10, 15, 20 and 31. 
     For each truck, its relationship between its king pin and its approach to its pivot pin cup, this angle can be of these graduations. 
     The graduations are determined by the plate that is provided with a roller skate. The benefit of this invention, of it being adapted to be shallow or steep, is to facilitate between these angles. 
     The present invention provides for an interchangeable axle housing. In current roller skates designs the axle housing cannot be removed from the truck body or boss being a one cast part. 
     LIST OF COMPONENTS 
     The drawings include the following integers.
       10  roller skate     12  shoe     14  wheels     16  axle     18  nuts     20  hanger     22  apertures     24  boss     26  threaded holes     28  screws     30  aperture     32  pin adaptor     34  hole     36  threaded apertures     38  shoulder     40  adjustable pin     42  threaded hole     44  lock nut     44  screw   

     Further advantages and improvements may very well be made to the present invention without deviating from its scope. Although the invention has been shown and described in what is conceived to be the most practical and preferred embodiment, it is recognized that departures may be made therefrom within the scope of the invention, which is not to be limited to the details disclosed herein but is to be accorded the full scope of the claims to embrace all equivalent devices and apparatus. Any discussion of the prior art throughout the specification should in no way be considered as an admission that such prior art is widely known or forms part of the common general knowledge in this field. 
     In the present specification and claims (if any), the word “comprising” and its derivatives including “comprises” and “comprise” include each of the stated integers but does not exclude the inclusion of one or more further integers.