Method of molding an integral spur gear and toothed sprocket ass

Details Method of molding an integral spur gear and toothed sprocket ass Method of molding an integral spur gear and toothed sprocket ass

1986-04-03

1987-09-08

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

291592, 264273, 264275, B29C 4514

Patent

active

046922946

ABSTRACT:
An improved seat belt retractor of the emergency locking variety is described. The primary improvement resides in providing a spur gear component which is insert molded directly onto one of the toothed sprockets of the retractor spool. By eliminating the two-piece prior art assembly, and molding the spur gear directly onto the toothed sprocket, the spur gear strength characteristics are vastly improved. Moreover, the relative positioning between the teeth of the spur gear and those of the toothed sprocket may be controlled with a very high degree of accuracy. This design further eliminates the required step of assembling the spur gear and sprocket together, and avoids problems of these components becoming separated during assembly or use.

REFERENCES:
patent: 2720119 (1955-10-01), Sherman
patent: 2955481 (1960-10-01), Jackel
patent: 2976741 (1961-03-01), Martin
patent: 3013440 (1961-12-01), White
patent: 3868068 (1975-02-01), Heath
patent: 3990136 (1976-11-01), Hishida
patent: 4078445 (1978-03-01), Kiser, Jr.
patent: 4083511 (1978-04-01), Ikesue
patent: 4437623 (1984-03-01), Wyder
patent: 4453681 (1984-06-01), Gueguen et al.
patent: 4483495 (1984-11-01), Honl

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