초록 ▼

A linear actuator has four drive gears which engage two racks. The actuator movable member may comprise two racks which have gear teeth which face inwardly and towards each other, or a single rack which has gear teeth which faces outwardly. In either case, four gear drives to engage the rack, two ge

A linear actuator has four drive gears which engage two racks. The actuator movable member may comprise two racks which have gear teeth which face inwardly and towards each other, or a single rack which has gear teeth which faces outwardly. In either case, four gear drives to engage the rack, two gear drives on each side. A plurality of linear actuators may be used to provide for position control in two or more directions. Control is provided by a servo mechanism.

대표청구항 ▼

[ What is claimed:] [1.] A linear actuator comprising in combination:a first gear rack;a second gear rack fixed with respect to said first gear rack and parallel to said first gear rack;wherein said gear racks face each other in opposition to each other;a pair of first drive gears in meshing engagem

[ What is claimed:] [1.] A linear actuator comprising in combination:a first gear rack;a second gear rack fixed with respect to said first gear rack and parallel to said first gear rack;wherein said gear racks face each other in opposition to each other;a pair of first drive gears in meshing engagement with said first gear rack;a pinion gear in contact with each of said first drive gears;a pair of second drive gears, each in meshing engagement with said second gear rack; andeach of said second drive gears in meshing engagement with one of said first drive gears.