Movable or removable closures – With means mounting closure for reciprocation
Patent
1995-02-27
1996-05-07
Kannan, Philip C.
Movable or removable closures
With means mounting closure for reciprocation
E05D 1506
Patent
active
055134696
ABSTRACT:
A retractable sliding door apparatus includes a door housing, a sliding door slidably mounted in the door housing, and a retractable spring mechanism mounted to the door housing and to the sliding door for retracting an open door to a closed position. The retractable spring mechanism includes a spring drum having a constant force retractable spring attached to it and in which the constant force retractable spring has one end attached to a bracket mounted on the door. The constant force retractable spring is made of a spiral strip of steel which has been heat treated while coiled to a predetermined curvature so that when the steel is extended, the stress in the steel resists the loading force at an approximate constant rate so that the sliding door is opened against a generally constant force and returns from an open to a closed position at a generally constant rate of movement under the force of a constant force spring to thereby avoid the door slamming shut.
REFERENCES:
patent: 2992450 (1959-01-01), Pittenger
patent: 3246363 (1966-04-01), Rogas
patent: 3267513 (1966-08-01), Wartian
patent: 3475865 (1969-11-01), Arnes
patent: 3480227 (1969-11-01), Matthews
patent: 3618262 (1970-03-01), Tuhro
patent: 3992751 (1976-11-01), Foster et al.
patent: 4004372 (1977-01-01), Beard et al.
patent: 4301623 (1981-11-01), Demukai
patent: 4675938 (1987-06-01), Bundschuh
patent: 4757642 (1988-07-01), Hahn
patent: 4935987 (1990-06-01), Sterner, Jr.
patent: 5105867 (1992-04-01), Coslett
patent: 5353548 (1994-10-01), Westfall
Tajudeen Eddie R.
Tajudeen Lisa A.
Hobby III William M.
Kannan Philip C.
LandOfFree
Retractable sliding 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 Retractable sliding door, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Retractable sliding door will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1219449