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US 8,570,607 B2Granted
Scanner with a multiple lead worm gear
AssigneeHewlett-Packard Development Company, L.P.
InventorEric L Andersen
Life of this patent
Estimating the term…
Abstract
A scanner drive system is disclosed. The scanner drive system has a drive motor. The drive motor has a worm gear attached to the motor spindle. The worm gear has multiple leads. The worm gear is meshed with a helical gear. The helical gear is coupled to a drive train that moves a scanning module.
Claims12
A scanner, comprising:
- a scanner base and a top cover, the top cover having a flatbed glass attached thereto, the top cover mounted to the scanner base, the scanner base forming a cavity;
- a drive motor attached to the scanner base inside the cavity, the drive motor having a spindle;
- a worm gear attached to the spindle, the worm gear having at least four leads;
- a helical gear meshed with the worm gear and coupled to a drive train;
- a scanning module located inside the cavity and coupled to the drive train, the scanner module movable along a scanning direction by the drive train.
2 more elements
A scanner drive system, comprising:
- a drive motor, the drive motor having a spindle;
- a worm gear attached to the spindle, the worm gear having multiple leads;
- a helical gear meshed to the worm gear and coupled to a drive train;
- a scanning module coupled to the drive train, the scanner module movable along a scanning direction by the drive train;
- and
- wherein the worm gear has four leads.
3 more elements
A method of driving a scanning module, comprising:
- rotating a worm gear attached to a motor spindle at a first rotational speed;
- reducing the first rotational speed to a second rotational speed using a helical gear meshed with the worm gear, wherein the worm gear has it least four leads and wherein the helical gear turns at the second rotational speed;
- moving a drive train with the helical gear;
- moving the scanning module along a scanning direction with the drive train.
1 more element
Dependencies are inferred from the claim text.