Helical drive insertion and ejection

Details Helical drive insertion and ejection Helical drive insertion and ejection

2005-06-14

2005-06-14

Chang, Richard (Department: 3729)

Metal working

Means to assemble or disassemble

Work-supported apparatus

C029S758000, C029S764000, C029S278000, C029S281000

Reexamination Certificate

active

06904655

ABSTRACT:
A helical drive system for seating and unseating a removable component, such as a printed circuit board, into a slot is described. The helical drive system includes a receptacle fixed to a housing proximate the slot. A handle and drive shaft are attached to the printed circuit board. The drive shaft has a helical groove that mates with a pin included in the receptacle. Rotation of the drive shaft pulls the printed circuit board into the slot and fully seats the printed circuit board. Rotation in the other direction unseats the printed circuit board. The helical groove has an enlarged entry that terminates in one or more points. This configuration facilitates the automatic alignment of the pin with the helical groove.

REFERENCES:
patent: 243035 (1881-06-01), Geer
patent: 4615274 (1986-10-01), Hoehn
patent: 4939908 (1990-07-01), Ewing et al.
patent: 5557998 (1996-09-01), Schwartz et al.
patent: 6213487 (2001-04-01), Doroftei
patent: 6354119 (2002-03-01), Molzer

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