Spring pin assembly

摘要

The subject invention provides a work support apparatus ( 20 ) including a spring pin assembly ( 32 ) for biasing a work piece ( 22 ) against a work stop ( 24 ), which includes a table ( 26 ) having a recess ( 30 ) with the spring pin assembly ( 32 ) disposed therein. The spring pin assembly ( 32 ) includes a housing having a side wall ( 48 ) and a top wall ( 50 ) having a circular opening ( 52 ) therethrough and a domed inner surface ( 54 ) extending upwardly from the side wall ( 48 ). A retaining pin ( 40 ) having a flat bottom surface ( 56 ) and a semi-spherical bottom portion ( 58 ) is urged against the domed inner surface ( 54 ) by a compression spring ( 42 ). A spring cup ( 44 ) transmits forces between the compression spring ( 42 ) and the flat bottom surface ( 56 ) of the retaining pin ( 40 ). A tool receiving device receives a tool for operating a holding mechanism ( 34 ) for securing the spring pin assembly ( 32 ) in the recess ( 30 ) such that the spring pin assembly ( 32 ) is removable from the top surface ( 28 ) of the table ( 26 ).