Automatic opening and closing device for a window

Details Automatic opening and closing device for a window Automatic opening and closing device for a window

1987-10-02

1989-09-26

Ro, Bentsu

Electricity: motive power systems

Motor-reversing

Automatic and/or with time-delay means

318266, 318466, H02P 122

Patent

active

048703338

ABSTRACT:
An automatic opening and closing device for a window which has a forwardly and reversely rotatable motor for opening and closing the widow, switching means which instructs said motor to rotate, pulse-detecting means which detects a pulse generated along with a rotation of said motor, counting means which counts a pulse number detected by said pulse-detecting means and rotation-controlling means which performs rotation-control to said motor on basis of a count number counted by said counting means and a predetermined count number is dislosed, by which it is possible to stop the opening or closing action of the window at a halfway, or possible to convert the action of the window in the reverse direction.

REFERENCES:
patent: 4035702 (1977-07-01), Pettersen et al.
patent: 4234833 (1980-11-01), Barrett
patent: 4514670 (1985-04-01), Fassel et al.
patent: 4529920 (1985-07-01), Yoshida et al.
patent: 4563625 (1986-01-01), Kornbrekke et al.
patent: 4608637 (1986-08-01), Okuyama et al.

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