Machine element or mechanism – Gearing – Directly cooperating gears
Patent
1990-11-08
1992-02-04
Herrmann, Allan D.
Machine element or mechanism
Gearing
Directly cooperating gears
29466, 49199, 49362, 74 8915, 160188, 403341, F16H 2520, E05F 1100, B23Q 300
Patent
active
050850946
ABSTRACT:
A screw and guide rail coupling assembly is for a garage door operator. The garage door operator has a motor-driven rotatable screw at least partially within a nonrotatable guide rail and a slide guided by the guide rail and movable longitudinally therealong by engagement with the screw and connectable to open and close the garage door. The screw is in at least first and second screw parts, and a screw coupling is adapted to interconnect adjacent ends of the first and second screw parts. The guide rail is in at least first and second guide parts, and a guide coupling adapted to interconnect adjacent ends of the first and second guide parts. The screw coupling is longitudinally spaced or offset from the guide coupling wherein the screw coupling is completely contained and supported within one of said first and second guide parts. The offset provides a significant increase in the maximum torque of the screw and guide rail coupling assembly.
REFERENCES:
patent: 2056174 (1936-10-01), Earhuff et al.
patent: 3290849 (1966-12-01), Wright
patent: 3439727 (1969-04-01), Perl
patent: 3444650 (1969-05-01), Flinchbaugh
patent: 4241540 (1980-12-01), Depperman
patent: 4352585 (1982-10-01), Spalding
patent: 4649016 (1987-03-01), Hardin, Jr.
Clawson Charles W.
Stottsberry James W.
GMI Holdings Inc.
Herrmann Allan D.
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