Combination manual and electric door opener

Details Combination manual and electric door opener Combination manual and electric door opener

1993-12-06

1994-12-27

Kannan, Philip C.

Movable or removable closures

With operator for movably mounted closure

Operating lever or link and closure swing about parallel axes

49 25, 49139, 49280, E05F 1510

Patent

active

053753747

ABSTRACT:
A combination manual and electric door opener having a bracket mounted to a door frame at a hinged side of the door. An electric motor is connected to the bracket and in turn connects to a threaded rod. A threaded nut is positioned around the threaded rod. Connected to the threaded rod is a cam arm. Upon engagement by the motor, the threaded nut rotates in a translational direction along the threaded rod. The cam arm is pivoted about a pivot point fastened to the top of the doorway and engages a closed door. The door is thus pivotally acted upon until it is in an open position.

REFERENCES:
patent: 1064648 (1913-06-01), Hohne et al.
patent: 2540538 (1951-02-01), Matchett
patent: 3398484 (1968-08-01), Katsumura et al.
patent: 4771218 (1988-09-01), McGee
patent: 4934203 (1990-06-01), Bailey et al.
patent: 4979261 (1990-12-01), Lasier et al.
patent: 5251400 (1993-10-01), Schultze

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