Rotary kinetic fluid motors or pumps – Including working fluid force responsive vane or flow control
Reexamination Certificate
1999-08-04
2001-02-20
Verdier, Christopher (Department: 3745)
Rotary kinetic fluid motors or pumps
Including working fluid force responsive vane or flow control
C415S147000, C415S150000, C415S157000, C416S22300B, C416S228000, C416S237000, C454S353000
Reexamination Certificate
active
06190122
ABSTRACT:
FIELD OF INVENTION
This invention relates to a motorized fan and air damper preferably for use with intake and exhaust air flow into and out of a building, and more particularly to such a device in which the motor driving the fan is movable toward and away from the damper.
BACKGROUND ART
In the prior art, it is known to have louvered dampers
100
as shown in
FIG. 13
with rotatable movable blades
102
in FIG.
13
. These dampers are amounted in the wall
104
in
FIG. 13
of a building to exhaust the air from the interior of the building or to draw air into the interior of the building. Typically, these dampers have a manual motorized actuating device to open the laterally disposed slats or blades of the damper in order to permit the intake or outflow of air. Further, there could have been a motor
106
FIG. 13
mounted on the interior of the building driving a fan proximate to the rear of the damper to draw in air or to blow air out. In such a case, it was common to have a bell mouthed shroud
108
FIG. 13
juxtaposed between the blades of the fan and the rear
110
FIG. 13
of the damper. A portion of the bell mouth was positioned in very close proximity to the tips
114
FIG. 13
of the blades in order to provide a partial seal and thereby provide pressurization. The same was true of the configuration for air intake fans. In each case, the motors were fixedly mounted with respect to the bell mouthed damper box shroud
108
.
DISCLOSURE OF THE INVENTION
SUMMARY OF THE INVENTION
My invention comprises a number of features in this type of apparatus which enhance its functioning. In particular, I provide a motor for driving the fan blades; which motor is mounted on rails which are connected to the fan box. The motor slides along the rails toward and away from the fan box in accordance with the preferred embodiments. Also provided are fan blades with trailing lips (to be described more fully hereinafter) which enhance the efficiency of the air flow in the mechanism. The motor is so connected and arranged on rails which are angled with respect to the damper box frame, such that the force of the weight of motor applied through a linkage actuates the blades in the damper to open and close the damper. In particular, an intake fan assembly is described having a motor and fan means mounted for movement toward and away from a rotatable blade damper; said motor and fan means being mounted on an obtuse angle (i.e. upward slope) to said damper frame for intake air movement through said damper. Alternatively, an exhaust fan assembly is provided having a motor and fan means mounted for movement toward and away from a rotatable blade damper; said motor and fan means being mounted on an acute angle (i.e. downward slope forward) to said damper when viewed from the side.
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patent: 1508086 (1924-09-01), Crawford
patent: 1818607 (1931-08-01), Campbell
patent: 3589268 (1971-06-01), Steiner
patent: 3827482 (1974-08-01), Pope
patent: 4445426 (1984-05-01), Bohanon, Sr.
patent: 4594940 (1986-06-01), Wolbrink et al.
patent: 4655122 (1987-04-01), McCabe
patent: 4859140 (1989-08-01), Passadore
patent: 5599172 (1997-02-01), McCabe
patent: 5711653 (1998-01-01), McCabe
patent: 5827044 (1998-10-01), Yazici et al.
patent: 6010307 (2000-01-01), McCabe
patent: 6030179 (2000-02-01), McCabe
patent: 6039533 (2000-03-01), McCabe
patent: 58-150734 (1983-09-01), None
patent: 39960 (1937-01-01), None
patent: 9201866 (1992-02-01), None
Benasutti Frank J.
Verdier Christopher
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