Patent ID: 8544366
Filing Date: 2013-10-01
Classification: B25B,Y10T

Abstract:
1. A spark plug removal tool apparatus for a spark plug having an extended smooth spark producing terminal portion, an adjacent helical threaded portion, an adjacent hex drive, an adjacent insulator portion, and a terminal electrical interface extension, said spark plug removal tool apparatus comprising: (a) a collet extension having a longitudinal axis, said collet extension including a removably engaging first end portion having a plurality of cantilevered fingers that flex substantially perpendicular to said longitudinal axis, said fingers have an outer portion that is frustroconical, and at an inner portion that is adapted to removably engage the electrical interface extension, said collet extension also having a threaded mid portion and a second end portion having a first means for imparting a first bidirectional rotational movement about said longitudinal axis; (b) an inner surrounding sidewall having a lengthwise axis, said the inner surrounding sidewall having a primary end portion with an inside surface that receives said plurality of cantilevered fingers frustroconical outer portion, said inner surrounding sidewall also having an intermediate portion with a threaded inner surface that threadably engages said threaded mid portion, said inner surrounding sidewall also including an intermediate portion outer surface, wherein said longitudinal axis and said lengthwise axis are co-axial, said inner surrounding sidewall also having a secondary end portion with an annular shoulder forming a flange that is positioned about said lengthwise axis; and (c) an outer surrounding sidewall having a long axis, said outer surrounding sidewall including a base end portion with an inner hex structure that is adapted to receive the hex drive and axially rest upon the helical threaded portion adjacent to the hex drive, said outer surrounding sidewall also including a center portion whose inner surface forms a slip fit clearance with said an intermediate portion outer surface, said outer surrounding sidewall further including a drive end portion that includes a stepped shoulder that is peripheral about said long axis, said stepped shoulder rotationally engages said annular shoulder flange such that said lengthwise axis and long axis are co-axial and said outer surrounding sidewall and said inner surrounding sidewall rotate relative to one another about said lengthwise and long axes, wherein said inner surrounding sidewall is fixed axially in relation to said outer surrounding sidewall for movement toward said base, with said movement being parallel to said lengthwise axis and long axes, said drive end portion also including a second means for imparting a second rotational movement about said long axis, wherein operationally when said second rotational movement is applied to said second means said second rotational movement is transferred to the adjacent hex drive that starts to unscrew the spark plug from an engine head wherein the helical threaded portion exerts an axial force against said base away from the engine head, wherein said axial force translates to said inner surrounding sidewall via said stepped shoulder and said flange to said collet extension via said threaded inner surface and threaded mid portion to said cantilevered fingers that engage the electrical interface extension, resulting in said axial force acting upon the electrical interface extension in lockstep with said axial force present at the helical threaded portion, wherein there is no rotational engagement as between the electrical interface extension and the helical threaded portion to help prevent separating damage between all of a portion of the spark plug components of the extended smooth spark producing terminal portion, the adjacent helical threaded portion, the adjacent hex drive, the adjacent insulator portion, and the terminal electrical interface extension.