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US4456041: Apparatus for filling and sealing a lubricant reservoir
11 Claims, No Drawings
The invention's application is suited in particular to the lubricated turning pairs of crawler tracks. It makes provision for the sealing of the lubricant reservoir by means of an elastomer plug, and for the introduction of a needle into and through the plug. The needle serves to effect evacuation of any existing air from within the reservoir, and the subsequent introduction of lubricating oil. The needle is then withdrawn from the plug which, by virtue of the elastic properties of the elastomer, automatically re-encloses the puncture produced by the needle.
- 1. Apparatus for filling and sealing a lubricant reservoir having interior wall means and located within the pivot element of lubricated turning pairs, in particular track link pivots and crawler track rollers, of the type includinga plug fashioned from elastomeric material and insertable into the mouth of the lubricant reservoir to seal said reservoir,needle means for injecting lubricant into the reservoir insertable through the plug in such a way that its extremity gains access to the reservoir interior, said needle means being withdrawn from the plug following introduction of the lubricant into the reservoir, the plug and the needle means being embodied such that the puncture produced by the latter re-encloses upon withdrawal of the needle means by virtue of the elastic quality of the material from which the plug is made, the improvement comprising:said plug being compressed upon insertion into said reservoir mouth, the outer surface of said plug defining means for preventing shifting of said plug in said reservoir mouth during insertion, or withdrawal of, said needle means into, or from, said inserted plug,said plug being retained in said reservoir mouth solely by the interaction of said reservoir wall means with said shifting preventing means of said plug outer surface and the radial forces resulting from said compression of said plug after insertion of the latter in said reservoir mouth.
U.S. Patent Documents
Foreign Patent Documents
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