Gear made of resin, and mold structure

Details Gear made of resin, and mold structure Gear made of resin, and mold structure

2005-04-26

2005-04-26

Bucci, David A. (Department: 3682)

Machine element or mechanism

Gearing

Teeth

C074SDIG001, C074S460000

Reexamination Certificate

active

06883397

ABSTRACT:
A gear made of a resin includes a substantially cylindrical rim having a plurality of teeth formed around an outer periphery thereof, a boss formed about a rotational center of the rim, and a web connecting the boss and the rim to each other. At least one groove is defined along outer surface of each tooth to divide the tooth in a widthwise direction of the tooth. As a result, a portion of the gear, in which the grooves are defined, is deformed in a reduced amount, leading to a reduced amount of deformation such as a warpage or sink in the entire gear, thereby providing an enhancement in tooth flank accuracy. Since the grooves are defined along the outer surfaces of the teeth, a lubricant such as grease can be supplied effectively to tooth flanks by previously applying the lubricant in the grooves.

REFERENCES:
patent: 2862400 (1958-12-01), D'Angelo
patent: 3602058 (1971-08-01), Beddoe
patent: 4473364 (1984-09-01), Roling
patent: 5400672 (1995-03-01), Bunch, Jr.
patent: 5852951 (1998-12-01), Santi
patent: 6000295 (1999-12-01), Kimizuka
patent: 6070484 (2000-06-01), Sakamaki
patent: 6181899 (2001-01-01), Fukuchi
patent: 58214053 (1982-06-01), None
patent: 58203257 (1983-08-01), None

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