Movable or removable closures – Plural wings radiate from common pivot; i.e. – revolving – With speed regulator
Patent
1989-11-20
1990-12-11
Smith, Gary L.
Movable or removable closures
Plural wings radiate from common pivot; i.e., revolving
With speed regulator
192105CD, E05D 1502
Patent
active
049760653
ABSTRACT:
A speed control apparatus for controlling the rate of motion of a door is disclosed which includes a shaft connected with the door by a gear train for causing rotation of the shaft at a preselected relative rate of rotation related to the rate of motion of the door by a preselected ratio, a braking assembly including a brake drum spaced from the shaft and first and second brake shoes pivotably connected at one end thereof with a carrying member attached to the shaft and having a single biasing spring adjustably connected between the other ends thereof, the brake shoes having a contact surface made of a non-asbestos friction material for contacting the brake drum when a selected rate of rotation of the shaft is exceeded, and an improved housing which is more efficiently sealable against invasion of moisture into the housing and the escape of lubricants from the housing.
REFERENCES:
patent: 20368 (1858-05-01), Pusey
patent: 482677 (1892-09-01), Dorton
patent: 2051008 (1936-08-01), Peremi et al.
patent: 3308912 (1967-03-01), Sheckells
patent: 3349876 (1967-10-01), Sheckells
patent: 3364620 (1968-01-01), Hess et al.
patent: 3693771 (1972-09-01), DeLancey
patent: 3717954 (1973-02-01), Sheckells
patent: 3968595 (1976-07-01), Sheckells
patent: 4119591 (1978-10-01), Aldreck
Beran Mark A.
Evans Allan J.
BC Research and Development, Inc.
Burdick Harold A.
Redman Jerry
Smith Gary L.
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