Automatic temperature and humidity regulation – Ventilator type – Mechanical linkage actuated
Patent
1989-11-27
1990-10-16
Tapolcai, William E.
Automatic temperature and humidity regulation
Ventilator type
Mechanical linkage actuated
98 4025, 137601, F24F 1315
Patent
active
049628828
ABSTRACT:
A ventilator opens and closes itself according to the temperature in its environment through the use of a bimetallic coil spring which acts through a drive element and linkage elements to open and close the louvers of the ventilator. The louvers are disposed in an air passageway that is defined by a housing, which defines a spring box to house the coil. The louvers are configured with an S-shaped cross section so as to provide positive engagement between the louvers when they are in the closed position. The drive element and a linkage element have rotation post with bifurcated flared heads that rotatably engage the louvers for simultaneous movement. A removable backframe has projecting tabs that fit into holes defined near the rear edge of the housing. The backframe has a closure surface for engaging a forward-extending free edge of the uppermost louver. The backframe also has a closure stop member that engages the lowermost edge of the bottom louver. The backframe has a louver rotation stop member that prevents the louvers from rotating beyond a certain point when opened. A front panel and a closure flap prevent the passage of air and light in the vicinity of the spring box. The backframe preferably is formed as a unitary structure of molded plastic. The housing, the spring box, and a collar surrounding the exterior of the housing preferably are formed as a unitary structure of molded plastic.
REFERENCES:
patent: 302215 (1884-07-01), Tucker
patent: 1335929 (1920-04-01), Allen
patent: 1358193 (1920-11-01), Fulton
patent: 2117529 (1938-05-01), Wile et al.
patent: 2187767 (1940-01-01), Akers
patent: 2216873 (1940-10-01), Browne
patent: 2241108 (1941-05-01), Akers
patent: 2551965 (1951-05-01), Petersen et al.
patent: 2814977 (1957-12-01), Noll
patent: 2975975 (1961-03-01), Weber
patent: 3027090 (1962-03-01), Zerhan, Jr.
patent: 3068776 (1962-12-01), Day
patent: 3195441 (1965-07-01), Hedrick
patent: 3368756 (1968-02-01), Edwards
patent: 3436016 (1969-04-01), Edwards
patent: 3528606 (1970-09-01), Witten
patent: 4151952 (1979-05-01), Edwards
patent: 4175480 (1979-11-01), Beam, Jr. et al.
patent: 4208010 (1980-06-01), Beam, Jr. et al.
patent: 4210279 (1980-07-01), McSwain
patent: 4231514 (1980-11-01), McSwain
patent: 4243175 (1981-01-01), McSwain
patent: 4274330 (1981-06-01), Witten et al.
patent: 4290554 (1981-09-01), Hensley
patent: 4328927 (1982-05-01), McSwain
patent: 4417687 (1983-11-01), Grant
patent: 4493456 (1985-01-01), Sarazen, Jr. et al.
patent: 4715532 (1987-12-01), Sarazen, Jr. et al.
patent: 4754696 (1988-07-01), Sarazen et al.
Beam, Jr. Dennis A.
Sarazen, Jr. Paul M.
LandOfFree
Ventilator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ventilator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ventilator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-845121