Movable or removable closures – Safety means responsive to obstruction to closure – Closure drive stopping or reversal
Patent
1990-03-22
1991-12-03
Kannan, Philip C.
Movable or removable closures
Safety means responsive to obstruction to closure
Closure drive stopping or reversal
49214, 49360, E05F 1502
Patent
active
050690000
ABSTRACT:
An obstruction detecting reversing apparatus is disclosed for a motor driven device, such as a powered vehicle door or window system, wherein the device undergoes varying loads, and consequently varying current draws, during normal operation. In order to accurately detect the presence of an obstruction, in light of such normally varying currents, the apparatus circuit logic monitors instantaneous motor current and compares it with the time average of motor current over a very short preceding time interval, which "tracks" normal current draw in order to sense an obstruction-caused rise in motor current at virtually any stage of the door closing operation, and thus also accommodates normal changes in current draw caused by different gravity effects when the device is oriented in different grade-caused orientations.
REFERENCES:
patent: 2628091 (1953-02-01), Rappl
patent: 3069151 (1962-12-01), Cook et al.
patent: 3124344 (1964-03-01), Mano
patent: 3141662 (1964-07-01), Wise
patent: 3202414 (1965-08-01), Simmons et al.
patent: 3344554 (1967-10-01), Misaka et al.
patent: 3398484 (1968-08-01), Katsumura et al.
patent: 3479767 (1969-11-01), Gardner et al.
patent: 3653154 (1972-04-01), Hayday
patent: 3844062 (1974-10-01), Daugirdal
patent: 3893260 (1975-07-01), Cadiou
patent: 4121382 (1978-10-01), Dietrich et al.
patent: 4183177 (1980-01-01), Kurdziel
patent: 4314692 (1982-02-01), Brauer et al.
patent: 4422521 (1983-12-01), Mochida
patent: 4462185 (1984-07-01), Shibuki et al.
patent: 4489640 (1984-12-01), Olson
patent: 4530185 (1985-07-01), Moriya et al.
patent: 4546845 (1985-10-01), Meyer et al.
patent: 4549369 (1985-10-01), Foley, Jr.
patent: 4612729 (1986-09-01), Sato
patent: 4617757 (1986-10-01), Kagiyama et al.
patent: 4621223 (1986-11-01), Murakami et al.
patent: 4640050 (1987-02-01), Yamagishi et al.
patent: 4644692 (1987-02-01), Schindehutte
patent: 4644693 (1987-02-01), Wang
patent: 4686598 (1987-08-01), Herr
patent: 4775178 (1988-10-01), Boyko
patent: 4831509 (1989-05-01), Jones et al.
patent: 4842313 (1989-06-01), Boyko et al.
patent: 4862640 (1989-09-01), Boyko et al.
patent: 4887390 (1989-12-01), Boyko et al.
Kannan Philip C.
Masco Industries, Inc.
LandOfFree
Reversing apparatus for powered vehicle door systems does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Reversing apparatus for powered vehicle door systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reversing apparatus for powered vehicle door systems will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1690353