although the disclosure hereof is detailed and exact to enable those skilled in the art to practice the invention , the physical embodiments herein disclosed merely exemplify the invention which may be embodied in other specific structure . while the preferred embodiment has been described , the details may be changed without departing from the invention , which is defined by the claims . medical examination tables having openings for step structures with supporting tracks are generally known in the art . the present invention departs from the convention and introduces a novel step structure that is self supporting . one embodiment of this invention is an extendable and retractable step structure that includes and elevated supporting surface . the elevated supporting surface , in one embodiment , is supported by at least one riser . in a preferred embodiment , the elevated supporting surface is supported by four risers . the four risers form a frame for the elevated surface , and adjacent risers are connected to each other . in the preferred embodiment , there is , for example , a leading front riser with an integrated handle structure . the leading front riser , when the step structure is in the retracted position , sits flush with the surrounding structures of the medical examination table . also in the preferred embodiment , the step structure has glides that rest on a surface . the surface is the same platform the medical examination table rests upon , for example . again discussing one embodiment of the invention , one of the four risers includes a back riser . the back riser carries a rolling element . the rolling element , in turn , rides on a feature of the cabinet opening , adapted to receive the rolling element , such as a track . referring to generally to the drawing , and specifically to fig1 and fig2 the present invention is shown in a front and rear isometric view , respectively . it will be observed that the present invention , embodied as a step herein disclosed may be used with conventional 10 for a medical examination table t ( not shown ) with only minimal changes thereto . the step 10 has a elevated supporting surface 18 with a safety mat 12 resting thereon . the elevated supporting surface 18 is of generous proportion , providing ample space for a patient to stand and maneuver while trying to mount the examination table t ( not shown ). the safety mat 12 may be of any material that provides suitable traction for patients who might be wearing a variety of footwear , or no footwear . the mat 12 should be of a surface that is easy to clean and disinfect . in the preferred embodiment , the elevated supporting surface 18 is supported by two risers or side walls 22 23 . a leading front wall 24 and a back wall or riser 26 are spaced opposite each other the step structure 10 is preferably and generally rectangular in shape . in the preferred embodiment , two housings are integrated into the back riser 26 . the two housings support a single solid axle 44 in a generally parallel plane to the back riser 26 . rotatably mounted at opposite ends of the axle 44 are a first wheel 38 and a second wheel 40 . the wheels 38 & amp ; 40 are rotatably mounted to the axle 44 in a manner that allows the wheels 38 & amp ; 40 to self - align with an associated track 16 . the track 16 is attached to an interior structure of the medical examining table t the table t provides an opening for the step 10 of the present invention . in the preferred embodiment , the track 16 consists of two generally parallel channels 42 that cooperate with each of the respective rolling elements 38 and 40 to facilitate extraction and retraction of the step 10 from the opening o in the table t . in the preferred embodiment the first wheel 38 and the second wheel 40 and the respective channels 42 are placed at or near the extremity of the overall dimension of the step 10 . an alternative embodiment not shown , may comprise a single channel or runner , designed to support one or more wheels at the general center of the overall dimension of the step 10 . still referring to fig1 and fig2 the leading front riser 24 is spaced from the back riser 26 and adjoining the two side risers 22 23 . the leading front riser 24 is integrated to a handle 28 . in the preferred embodiment , the handle 28 is formed by a recess in the leading front riser 24 , however , many alternative handles 28 are envisioned ( not shown ), such as at least one handle 28 externally mounted to the leading front riser 24 ( not shown ), or a plurality of recessed handles 28 ( not shown ). again referring to fig1 and fig2 a foot 30 extends from the side risers 22 23 a glide 32 projects from each foot 30 . the glide 32 rests on the floor when the step 10 is extracted and used by patients to mount the examination table t . in one embodiment , the glide is a sliding member and maybe manually adjusted to compensate for irregular variations in the level of the surface or floor . in alternative embodiment not shown , the glide may be a rolling element . in yet another embodiment not shown , the glide may be self leveling . again , it is anticipated that those skilled in the art would understand that the leveling or height adjusting features of the glide are well known to exist in a myriad of forms , such as , the use of flexible tension members , springs , threaded members and the like . now referring to fig3 and fig4 a reference is made to a table t having an opening . the table t is represented by phantom lines . the step 10 of the present invention is shown in relation to the table t . fig3 demonstrates the step 10 in the retracted position . in this position , only the leading front riser 24 is exposed to view . the leading front riser 24 abuts flush with the surrounding structure of the table t . in the retracted position , the step 10 may be selectively extended by pulling on at least one handle 28 . fig4 shows the step 10 in the extended position . in this view , the step 10 presents the patient with a large elevated supporting surface 18 that can be used as an aid for mounting the examination table t . also depicted is the position of the step 10 in the extended position in relation to the table t . as shown , the step 10 extends from the table t , but is not completely removed . a portion of the step 10 remains in the cavity defined by the opening of the table t . still referring to fig4 the step 10 in the extended position sits on two glides 32 which project from each foot 30 . in the profile view of fig4 one glide 32 is not shown . however , it will be apparent that the step 10 is self - supporting by means of the pair of glides 32 protruding from each foot 30 . it will be apparent that the foot 30 acts simply as a means to support the step 10 , and alternative means would serve the purpose of providing a self - supporting step 10 equally well . for example , the glide 32 could be directly integrated into one of the risers 22 23 24 . or the foot 30 could rest directly on the floor or the surface of the examination room without the use of a glide 32 . in a preferred embodiment , a glide 32 is contemplated to aid the extraction and retraction of the step 10 from the table t . the glide 32 further serves , for example , as a stabilizing element when positioned over uneven surfaces . now referring to fig5 a profile view of the step 10 and a cut - a - way view of the related table t are depicted . from this figure , it can be seen that the step 10 is prevented from excessive retraction by means of a stop 34 located on an internal structure of the table t . also depicted is a brace 36 on a second structure of the table t . the brace prevents hyper - extension of the step 10 in the extended position . in an embodiment , the brace 36 and the stop 34 are depicted as separate elements . in alternative embodiment , the brace and the stop could be combined into a single structure . in one embodiment , the stop 34 is a pre - existing structure on the medical examination table t ( not shown ). still referring to fig5 one of the pair of parallel channels 42 is depicted . the rolling element 14 rolls on the respective channel 42 . the second runner is not shown , but its function and structure is understood by a person skilled in the art . as shown in fig9 an anticipated alternative embodiment of the present invention is the use of the first wheel 38 and the second wheel 40 , each carried by a respective housing by two separate bent axles 44 ′. in this manner , the wheels can orient themselves in each respective track 42 independent of each other . this is advantageous because it creates a robust design and permits smoother extraction of the step from the examination table if , for example , the tracks should be not be parallel . further , the two bent members are less likely to become damaged or mis - aligned from assembly or handling or operation . another embodiment of the present invention is the incorporation of the housing within the back or side riser of the step . further anticipated embodiments include a handle or a plurality of handles coupled to the leading front riser of the step . yet another embodiment of the current invention includes the use of rolling elements in lieu of sliding glides . it will be apparent that the step 10 maybe made from a variety of material . in one embodiment , the step is , for example molded a composite material , such as , a conventional abs - type plastic . in another embodiment , the step may be fabricated and assembled from metal , such as , 12 - gauge sheetsteel . the foregoing is considered as illustrative only of the principles of the invention . furthermore , since numerous modifications and changes will readily occur to those skilled in the art , it is not desired to limit the invention to the exact construction and operation shown and described . while the preferred embodiment has been described , the details may be changed without departing from the invention , which is defined by the claims .
a retractable and self - supporting step for a medical examination table and a method for use . the step having a large top with a safety mat for ease of use and patient maneuverability can be selectively extended from a cavity located on a medical examination and returned when not in use . the step is self - supporting , thus providing enhanced stability and safety during use .