Pointing device

Details Pointing device Pointing device

2005-03-22

2005-03-22

Chang, Kent (Department: 2673)

Computer graphics processing and selective visual display system

Display peripheral interface input device

Cursor mark position control device

C345S167000

Reexamination Certificate

active

06870527

ABSTRACT:
A pointing device includes a casing in which a track ball is rotatably received and physically engaging two substantially perpendicular rotatable axles and a biasing structure forcibly biasing the track ball toward the axles. The biasing structure includes a frame rotatably supported inside the casing by pivots and a retainer mounted to the frame. The retainer includes a plurality of pawls spaced along a circumference to form a space for rotatably receiving and retaining a sphere. A biasing element is arranged between the casing and the frame to bias the sphere to forcibly engage the track ball thereby forcing the track ball against the rotatable axles.

REFERENCES:
patent: 4952919 (1990-08-01), Nippoldt
patent: 5162780 (1992-11-01), Solhjell
patent: 5171978 (1992-12-01), Mimlitch et al.
patent: 5621436 (1997-04-01), Solhjell
patent: 5790098 (1998-08-01), Lin
patent: 5926167 (1999-07-01), Niitsuma et al.
patent: 6256013 (2001-07-01), Siddiqui

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