Patent ID: 6042456
Filing Date: 2000-03-28
Classification: B24B,B24D,F01L,F16K

Abstract:
A dynamic valve lapping tool for use in refacing valves and valve seats comprising:a hollow cylindrical handle having a forward end and a rearward end;an adapter having a stepped forward end and a rearward end, the adapter further including a threaded interior, an O-ring adapted to be positioned about the stepped forward end, the stepped forward end positioned within the forward end of the handle;an elastomeric suction cup having a rearward threaded stud and a forward suction element, the suction element having a series of radially extending ribs formed upon an inner surface, an passageway extending through an entire length of the suction cup, the stud being threadably secured within the threaded interior of the adapter;a reciprocating assembly adapted for linear travel within an interior of the handle for selectively drawing air into and expelling air out of the suction cup, the assembly comprising;a piston having a forward end and a rearward end, a groove formed within the forward end, an o-ring positioned within the groove of the piston, the piston positioned within the interior of the handle;an extension spring secured to the rearward end of the piston by way of a crimp ring;an end cap secured over the rearward end of the handle, the securement between the end cap and the handle being a press fit, the end cap having a forward end and a rearward end and a central passageway, the forward end being interconnected to the extension spring by way of a second crimp ring;a piston rod having a forward end secured to the end of the piston, a rearward end with a button formed thereon, and an intermediate extent positioned through the end cap and within the extension spring, the piston rod and button functioning to maneuver the reciprocating assembly within the handle;a valve to be resurfaced secured to the suction cup through a vacuum.