Manual operating mechanism for upward acting door

Details Manual operating mechanism for upward acting door Manual operating mechanism for upward acting door

2007-08-28

2007-08-28

Thompson, II, Hugh B. (Department: 3634)

Flexible or portable closure, partition, or panel

Roll type

With rotating means

Reexamination Certificate

active

10926551

ABSTRACT:
An upward acting door, such as a flexible curtain rollup door, is moveable between open and closed positions by an electric motor drive unit wherein the motor has a drive shaft with an external drive tang for engagement with a hand crank member. The crank member is adapted for mounting on a wall bracket and in engagement with a switch connected to a motor control unit. When the crank member is removed from its bracket, the switch causes the motor control unit to prevent transmission of electrical power to the motor. A manually disengageable brake is associated with the motor drive unit and is connected via an actuating member to a foot pedal which may be operated by a person using the crank member to disengage the brake and to allow free rotation of the motor drive shaft.

REFERENCES:
patent: 3089540 (1963-05-01), Schwartz
patent: 3181855 (1965-05-01), Willenbring
patent: 3853167 (1974-12-01), Wardlaw
patent: 3921264 (1975-11-01), Madonian et al.
patent: 3970134 (1976-07-01), Sinnock et al.
patent: 4721146 (1988-01-01), Wardlaw
patent: 5203392 (1993-04-01), Shea
patent: 5447477 (1995-09-01), Bresson et al.
patent: 5485764 (1996-01-01), Sugimoto et al.
patent: 5711360 (1998-01-01), Viotte
patent: 5921305 (1999-07-01), Grudl
patent: 5924949 (1999-07-01), Fan
patent: 6234453 (2001-05-01), Block
patent: 6360488 (2002-03-01), Darling
patent: 6394172 (2002-05-01), Kessous
patent: 7034682 (2006-04-01), Beggs et al.
patent: 2002/0079068 (2002-06-01), Kessous

Affiliated with

Also associated with

Rating

Manual operating mechanism for upward acting door does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Manual operating mechanism for upward acting door, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Manual operating mechanism for upward acting door will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3857179