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2. 发明授权

US4512424A Tubular spring slip-joint and jar 失效
标题翻译：管状弹簧滑动关节和罐
公开(公告)号：US4512424A
公开(公告)日：1985-04-23
申请号：US564820
申请日：1983-12-22
申请人： Timothy R. Heemstra
发明人： Timothy R. Heemstra
IPC分类号： E21B17/07 , E21B23/00 , E21B31/107
CPC分类号： E21B23/006 , E21B17/07 , E21B31/107
摘要： The present invention comprises a pressure balanced tubular spring slip-joint and jar including a generally tubular outer housing having longitudinal slot means in the wall thereof, and a hammer area of increased wall thickness at one end thereof, within which housing slidably extends a jar mandrel means having first and second longitudinally spaced enlarged diameter anvil areas, at least one fastener tapped into one of those anvil areas, the heads of said fastener protruding into said slot means. Both said housing and said mandrel means possesses axial bores therethrough, which are placed in communication via the bore of a tubular spring within the housing, whereby during extension and contraction of the slip-joint and jar means of the present invention the area within said axial bores and said spring bore is of a constant volume. The invention may be employed to provide force impulses in either longitudinal direction, said tubular spring aiding the application of those impulses when said housing and said mandrel means move relatively toward each other. By proper selection of spring length and use of a coiled spring having spaced coils, the present invention may also be employed as a bi-directional shock absorber.
摘要翻译：本发明包括压力平衡管状弹簧滑动关节和罐，其包括大致管状的外壳，其外壁上具有纵向槽装置，在其一端具有增加的壁厚的锤区域，其中壳体可滑动地延伸罐心轴具有第一和第二纵向间隔开的扩大直径的砧座区域的装置，至少一个紧固件被敲入到这些砧座区域中的一个中，所述紧固件的头部突出到所述狭槽装置中。所述壳体和所述心轴装置都具有穿过其中的轴向孔，其经由壳体内的管状弹簧的孔放置成连通，由此在本发明的滑动接头和罐装置的伸展和收缩期间，所述轴向孔和弹簧孔的体积是恒定的。本发明可以用于在纵向方向上提供力冲击，当所述壳体和所述心轴装置相对于彼此移动时，所述管状弹簧帮助应用这些脉冲。通过适当选择弹簧长度和使用具有间隔线圈的螺旋弹簧，本发明也可以用作双向减震器。

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