Patent ID: 6457759
Filing Date: 2002-10-01
Classification: B25B,H01L

Abstract:
An adsorption tool for adsorbing and releasing an article comprising:a contact head defining an internal space between said contact head and said article; a body coupled to the contact head, said body comprising an enclosure member including an inner wall having plural projecting keys; and a pressure-adjuster in said adsorption tool for reducing an internal pressure of said internal space from an atmospheric pressure so that said contact head adsorbs said article due to a reduced internal pressure, and for returning said internal pressure of said internal space to the atmospheric pressure so that said contact head releases said article, said pressure-adjuster including a valve mechanism having a valve for switching said internal space between a closed-state when said internal space is at said reduced pressure, and an open-state when said internal space is at said atmospheric pressure, a knock mechanism connected to said valve mechanism for placing said valve mechanism into said closed and open states, a valve seat adjacent to said valve, and a valve rod terminating at said valve and held by said knock mechanism, said knock mechanism moving said valve to a first position apart from said valve seat and said knock mechanism moving said valve to a second position in contact with said valve seat, said knock mechanism comprising a rotational lock member having plural first key grooves for receiving said plural projecting keys and a first ratchet, said rotational lock member having a bottom portion engaging a stepped portion of said valve rod for receiving a force toward said first ratchet; a lock operational member having plural second key grooves for receiving said plural projecting keys and a second ratchet for engaging said first ratchet; a first coil-spring member between said contact head and said enclosure member for applying a first spring force to said enclosure member in an anti-parallel direction toward said contact head; and a second coil-spring member between a spring seat of said valve rod and a bottom of said enclosure member for applying a second spring force to said spring seat so that said stepped portion of said valve rod is forced toward said first ratchet.