Metal working – Means to assemble or disassemble – Means to disassemble electrical device
Reexamination Certificate
2007-03-13
2007-03-13
Chang, Richard (Department: 3726)
Metal working
Means to assemble or disassemble
Means to disassemble electrical device
C029S426500, C029S762000
Reexamination Certificate
active
10863473
ABSTRACT:
A pin removal structure used in printed circuit board drilling machine comprised of a main body, a first driving member, a first driving rod, a collet member, a lower mounting cover, a socket, a second driving member, a plurality of second driving rods, and an air pressure control valve member. The collet member is sleeved vertically onto the locating pin, and through articulation of the air pressure control valve member, the first driving member and the first driving rod having the collet member positioned at its anterior extremity are impelled by air pressure into upward and forward movement, the collet member then guided by the socket fastened to a lower mounting cover to firmly clamp onto the locating pin. Attached to the second driving member, the plurality of second driving rods are at the same time impelled by air pressure into forward and downward movement such that when the second driving rods contact the printed circuit board in which the locating pin is implanted, the force of the forward thrust is applied against the printed circuit board carrying plate, enabling the rapid and safe and, furthermore, accurate and easy extraction of the locating pin.
REFERENCES:
patent: 5375319 (1994-12-01), Jacobs
patent: 6279225 (2001-08-01), Martin et al.
patent: 6444082 (2002-09-01), Campbell et al.
patent: 6957484 (2005-10-01), Pupin et al.
Chang Richard
Rosenberg , Klein & Lee
LandOfFree
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