Patent Publication Number: US-RE35282-E

Title: Push rod apparatus

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The field of invention relates to push rod construction, and more particularly pertains to a new and improved push rod apparatus wherein the same is arranged to provide for adjustable push rod for use in an internal combustion engine. 
     2. Description of the Prior Art 
     Push rods of various types are utilized within internal combustion engines to accommodate varying internal combustion engine configurations. Push rod apparatus is exemplified in the prior art in the U.S. Pat. No. 4,864,983 to Breitbarth; U.S. Pat. No. 4,645,639 to Potter; U.S. Pat. No. 3,661,127 to Cornell; and U.S. Pat. No. 4,442,770 to Dozier. 
     Accordingly, it may be appreciated that there continues to be a need for a new and improved push rod apparatus as set forth by the instant invention which addresses both the problems of ease of use as well as effectiveness in construction and in this respect, the present invention substantially fulfills this need. 
     SUMMARY OF THE INVENTION 
     In view of the foregoing disadvantages inherent in the known types of push rod apparatus now present in the prior art, the present invention provides a push rod apparatus wherein the same is arranged with a central tubular body permitting extension of a threaded rod directed from an upper distal end of the tubular body. As such, the general purpose of the present invention, which will be described subsequently in greater detail, is to provide a new and improved push rod apparatus which has all the advantages of the prior art push rod apparatus and none of the disadvantages. 
     To attain this, the present invention provides a push rod arranged with a central coaxially aligned tubular body, including a bore directed coextensively throughout the tubular body. An integrally threaded insert is mounted with an upper distal end of the tubular body threadedly to an elongate threaded rod member formed with a hex boss mounted and formed to an upper distal end of the threaded rod member portion, with an extension rod coaxially aligned with the threaded rod member extending beyond the threaded rod member terminating in a first hemi-spherical tip. A first bore is directed coextensively throughout the rod member, extension rod, and hex boss. A lock nut is threadedly received about the threaded rod member for engagement with the insert hex head for locking of the threaded rod member relative to the tubular body. A lower insert rod is received within a lower distal end of the tubular body formed with an abutment ring and terminating in a second hemi-spherical tip. The push rod is accordingly longitudinally adjustable to accommodate varying internal combustion engine spacings from an associated valve tappet to a rocker arm. .[.A lubrication container is arranged for mounting a set of such push rods prior to use..]. 
     My invention resides not in any one of these features per se, but rather in the particular combination of all of them herein disclosed and claimed and it is distinguished from the prior art in this particular combination of all of its structures for the functions specified. 
     There has thus been outlined, rather broadly, the more important features of the invention in order that the detailed description thereof that follows may be better understood, and in order that the present contribution to the art may be better appreciated. There are, of course, additional features of the invention that will be described hereinafter and which will form the subject matter of the claims appended hereto. Those skilled in the art will appreciate that the conception, upon which this disclosure is based, may readily be utilized as a basis for the designing of other structures, methods and systems for carrying out the several purposes of the present invention. It is important, therefore, that the claims be regarded as including such equivalent constructions insofar as they do not depart from the spirit and scope of the present invention. 
     Further, the purpose of the foregoing abstract is to enable the U.S. Patent and Trademark Office and the public generally, and especially the scientists, engineers and practitioners in the art who are not familiar with patent or legal terms or phraseology, to determine quickly from a cursory inspection the nature and essence of the technical disclosure of the application. The abstract is neither intended to define the invention of the application, which is measured by the claims, nor is it intended to be limiting as to the scope of the invention in any way. 
     It is therefore an object of the present invention to provide a new and improved push rod apparatus which has all the advantages of the prior art push rod apparatus and none of the disadvantages. 
     It is another object of the present invention to provide a new and improved push rod apparatus which may be easily and efficiently manufactured and marketed. 
     It is a further object of the present invention to provide a new and improved push rod apparatus which is of a durable and reliable construction. 
     An even further object of the present invention is to provide a new and improved push rod apparatus which is susceptible of a low cost of manufacture with regard to both materials and labor, and which accordingly is then susceptible of low prices of sale to the consuming public, thereby making such push rod apparatus economically available to the buying public. 
     Still yet another object of the present invention is to provide a new and improved push rod apparatus which provides in the apparatuses and methods of the prior art some of the advantages thereof, while simultaneously overcoming some of the disadvantages normally associated therewith. 
     These together with other objects of the invention, along with the various features of novelty which characterize the invention, are pointed out with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the invention, its operating advantages and the specific objects attained by its uses, reference should be had to the accompanying drawings and descriptive matter in which there is illustrated preferred embodiments of the invention. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The invention will be better understood and objects other than those set forth above will become apparent when consideration is given to the following detailed description thereof. Such description makes reference to the annexed drawings wherein: 
     FIG. 1 is an isometric illustration of the instant invention in an exploded illustration. 
     FIG. 2 is an orthographic side view of the threaded rod assembly. 
     FIG. 3 is an orthographic bottom view of the assembly as set forth in FIG. 2. 
     FIG. 4 is an orthographic side view of the lock nut structure. 
     FIG. 5 is an orthographic bottom view of the lock nut structure. 
     FIG. 6 is an orthographic side view of the threaded insert. 
     FIG. 7 is an orthographic bottom view of the threaded insert. 
     FIG. 8 is an orthographic side view of the tubular body. 
     FIG. 9 is an orthographic bottom view of the tubular body. 
     FIG. 10 is an orthographic side view of the lower insert portion. 
     FIG. 11 is an orthographic bottom view of the lower insert portion. 
     .[.FIG. 12 is an isometric illustration of a reservoir housing for use by the invention..]. 
     .[.FIG. 13 is an orthographic view, taken along the lines 13--13 of FIG. 12 in the direction indicated by the arrows..]. 
     .[.FIG. 14 is an orthographic view of section 14 as set forth in FIG. 13..]. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
     With reference now to the drawings, and in particular to FIGS. 1 to .[.14.]. .Iadd.11 .Iaddend.thereof, a new and improved push rod apparatus embodying the principles and concepts of the present invention and generally designated by the reference numeral 10 will be described. 
     More specifically, the push rod apparatus 10 of the instant invention essentially comprises a central tubular body 11 including a tubular body bore 12 extending throughout the tubular body. The tubular body includes an internally threaded insert 13 threadedly or fixedly secured within an upper distal end of the bore 12. The insert 13 includes an insert hex head 14 mounted to an upper distal end of the insert extending radially and exteriorly thereof for abutment with an upper distal end of the tubular body. A threaded rod member 15 is threadedly received with the internally threaded insert 13, wherein the threaded rod member 15 includes an internally threaded lock nut threaded received thereabout for engagement with the insert hex head 14 for locking in longitudinal orientation of the threaded rod member 15 relative to the threaded insert 13. An extension rod 17 extends coaxially and forwardly of the threaded rod member 15, with a hex boss 18 extending radially exteriorly of the extension rod 17 and the threaded rod member 15. The hex boss provides for ease of rotation of the threaded rod member 15 relative to the insert 13 in use and adjustment of the push rod relative to an internal combustion engine (not shown). A first hemi-spherical tip 19 terminates the upper distal end of the extension rod 17 typically for engagement with a rocker arm of an internal combustion engine. A first bore 20 is directed coextensively through the threaded rod member 15, the extension rod 17, and the hex boss 18 to include the hemi-spherical tip 19. 
     A lower inset rod 11 is received within the lower distal end portion of the tubular body 11 within the tubular body bore 12. The lower insert rod 21 includes an abutment ring 21 extending radially and exteriorly thereof for abutment with the lower distal end of the tubular body 11, and with the insert 21 terminating in a second hemi-spherical tip 23 at a free distal end of the lower insert. A second bore 24 extends coextensively and coaxially of the second insert to include the lower insert rod 21, the abutment ring 22, and the second hemi-spherical tip 23. 
     Typically, the push rod is of a minimum length for utilization in a motorcycle engine, such as a &#34;Harley Davison&#34; (R) to be defined by 7.5 inches n length. The three eighths inch internally threaded lock nut 16 includes a beveled lower portion for engagement with the insert hex head 14 to insure ease of locking. The beveled surface 16a is illustrated in the FIGS. 1 and 4. 
     .[.The FIGS. 12-14 illustrate the use of a reservoir housing 25 by the organization, wherein the reservoir housing is formed to include a housing top wall 26, with a top wall opening 27 directed therethrough to receive a lubricant 29. A cap 28 is arranged for securement about the opening 27 to maintain lubricant therewithin. The push rods are directed through a housing first end wall 30 to be directed into the lubricant within the housing and upon projection may be directed through the second end wall 31 upon use of the push rods. In this manner, the push rods are maintained in a lubricated bath prior to use to maintain their surfaces free of corrosion, debris, and the like..]. 
     .[.The first end wall 30 includes a plurality of entrance openings 32, each entrance opening 32 is coaxially aligned with an exit opening 36 within, the second end wall 31. Each entrance opening 32 includes radially oriented flap members 33 within each entrance opening, with a first door plate 34 (see FIG. 13) positioned by a first spring hinge 35 to an interior surface of the first end wall 30. In this manner, the push rods may be directed into the housing. The exit openings 36 include exit opening flaps 37 radially directed into the exit openings to maintain fluid within the housing in a like manner as the entrance opening flap members 33. A second door plate 38, including a second door plate spring hinge 39, is mounted to an exterior surface of the second end wall 31 to insure fluid sealing of the lubricant contained within the housing and permit projection of the push rods through the exit opening and the second door plate 38 upon use of each push rod..]. 
     .[.As to the manner of usage and operation of the instant invention, the same should be apparent from the above disclosure, and accordingly no further discussion relative to the manner of usage and operation of the instant invention shall be provided..]. 
     With respect to the above description then, it is to be realized that the optimum dimensional relationships for the parts of the invention, to include variations in size, materials, shape, form, function and manner of operation, assembly and use, are deemed readily apparent and obvious to one skilled in the art, and all equivalent relationships to those illustrated in the drawings and described in the specification are intended to be encompassed by the present invention. 
     Therefore, the foregoing is considered as illustrative only of the principles of the invention. Further, 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, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope of the invention.