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A releasible tool is provided for removing a cylindrical member such as a valve seat, a pump liner, or a bushing from machines, pumps, oil well tubing, or other devices in which it is used. The releasable tool includes a mandrel, a platform slidably mounted to the mandrel, at least two jaws pivotall

A releasible tool is provided for removing a cylindrical member such as a valve seat, a pump liner, or a bushing from machines, pumps, oil well tubing, or other devices in which it is used. The releasable tool includes a mandrel, a platform slidably mounted to the mandrel, at least two jaws pivotally mounted to the platform, and an adaptor connected to the mandrel. The mandrel has a generally bell-shaped lower end and a shank portion. The platform is slidably mounted on the shank portion of the mandrel by placing the shank portion through a central bore of the platform. The jaw members are pivotally mounted to the platform, whereby they can be pivotally deflected outward to an expanded position by the bell-shaped lower end of the mandrel when the platform slides down the shank portion. The adaptor is releasably connected to the upper end of the shank portion of the mandrel. The adaptor and platform have corresponding tapered surfaces that can be engaged to form a releasable interference fit to grab and slide the platform upward relative to the shank portion of the mandrel, which moves the jaw members away from the bell-shaped lower end of the mandrel so that they can be pivotally deflected inward to a retracted position. Thus, the tool can be selectively inserted into or removed from a cylindrical member.

대표청구항 ▼

A releasible tool for removing a cylindrical member with a bore therethrough such as a valve seat, a pump liners, or a bushing from machines, pumps, or other devices in which it is used, the releasable tool comprising: (a) a mandrel having a generally bell-shaped lower end and a shank portion; (b) a

A releasible tool for removing a cylindrical member with a bore therethrough such as a valve seat, a pump liners, or a bushing from machines, pumps, or other devices in which it is used, the releasable tool comprising: (a) a mandrel having a generally bell-shaped lower end and a shank portion; (b) a platform having a central bore therethrough and an upwardly extending tapered surface, said platform being slidably mounted on said shank portion of said mandrel by placing said shank portion through said central bore of said platform; (c) at least two jaw members pivotally mounted to said platform, whereby they can be pivotally deflected outward to an expanded position by said bell-shaped lower end of said mandrel when said platform slides down said shank portion of said mandrel; and (d) an adaptor releasably connected to an upper end of said shank portion of said mandrel, said adaptor having a downwardly extending tapered surface corresponding to said upwardly extending tapered surface of said platform, whereby said upwardly and downwardly extending tapered surfaces can be engaged to form a releasable interference fit to grab and slide said platform upward on said shank portion, which moves said jaw members away from said bell-shaped lower end of said mandrel so that said jaw members can be deflected inward to a retracted position.