PINION AND POWER TRANSMISSION DEVICE
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United States of America Patent
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Issued Date -
Dec 31, 2020
app pub date -
Nov 22, 2019
filing date -
Jun 28, 2019
priority date (Note) -
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Abstract
A pinion (1) including a pin gear allows easy engagement with or disengagement from a mating gear. The pinion (1) includes a plurality of pins (2) as teeth, and includes a first plate (4) and a second plate (5) described below. The first plate (4) interconnects first ends of the pins (2). The second plate (5) is spaced from the first plate (4) in the rotation axis direction of the pinion (1), and interconnects second ends of the pins (2). The second plate (5) has, on its outer peripheral edge, recesses (15, 16) each between two pins (2) adjacent circumferentially. The recesses (15, 16) recede inward from inner circumferential ends of the pins (2). The pinion (1) is moved axially for engagement with or disengagement from the rack (3). The pinion (1) increases flexibility at the time of engagement with or disengagement from a mating gear.
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