Air circulatory system for an enclosure
First Claim
1. An air circulatory system (32) adapted for use with a cab (10) of a vehicle, comprising:
- a housing (30) having first and second compartments (34,36) and an inlet (70) defined by the housing (30) for communication with air circulating within the cab (10) into the first compartment (34) said housing providing support for a seat assembly;
a pair of fresh air passageways (48,50) each having a first end portion (59) that defines an opening (56) in a respective one of an opposing side (14,16) of the cab (10) and a second end portion (62) that is engaged with a respective one of opposing sides (52,54) of the first compartment (34), said fresh air passages (48,50) being sufficient for communicating ambient air outside the cab (10) with the first compartment (34);
an air duct means (78,80) having a first end portion (82) positioned for communication with the second compartment (36) of the housing (30) and a second end portion (90) that extends forwardly from the housing (30) to a position that is adjacent a front wall (18) of the cab (10) and defines a plurality of air discharge ports (102,104,110,114) that are spaced laterally from one another a distance that is substantially equal to the width of the seat assembly; and
a blower assembly (40) positioned in the second compartment (36) and being sufficient for drawing ambient air and air circulating within the cab (10) through the first compartment (34) and into the second compartment (36) and directing it back into the cab (10) through the discharge ports (102,104,110,114) at a preselected pressure that is within a range of 0.398 to 0.439 KpA greater upon discharge from the second compartment (36) than the air that is drawn into the second compartment (36).
1 Assignment
0 Petitions
Accused Products
Abstract
The air circulatory system (32) utilizes a first and second air passageways (46) for communicating ambient air into the cab and an inlet (73) to introduce air that is circulating within the cab into the system through passageways (48,50,70,34) that create very little restriction for the air flowing therethrough. A pair of ducts (76) is utilized to discharge to air back into the cab (10) that also creates very little restriction for the air flow. This results in a very small drop in air pressure between the air being introduced into the blower assembly (40) and the air exiting the blower assembly (40). Subsequently, the requirements of the blower assembly (40) and the noise created by its operation kept at a minimum.
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Citations
18 Claims
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1. An air circulatory system (32) adapted for use with a cab (10) of a vehicle, comprising:
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a housing (30) having first and second compartments (34,36) and an inlet (70) defined by the housing (30) for communication with air circulating within the cab (10) into the first compartment (34) said housing providing support for a seat assembly; a pair of fresh air passageways (48,50) each having a first end portion (59) that defines an opening (56) in a respective one of an opposing side (14,16) of the cab (10) and a second end portion (62) that is engaged with a respective one of opposing sides (52,54) of the first compartment (34), said fresh air passages (48,50) being sufficient for communicating ambient air outside the cab (10) with the first compartment (34); an air duct means (78,80) having a first end portion (82) positioned for communication with the second compartment (36) of the housing (30) and a second end portion (90) that extends forwardly from the housing (30) to a position that is adjacent a front wall (18) of the cab (10) and defines a plurality of air discharge ports (102,104,110,114) that are spaced laterally from one another a distance that is substantially equal to the width of the seat assembly; and a blower assembly (40) positioned in the second compartment (36) and being sufficient for drawing ambient air and air circulating within the cab (10) through the first compartment (34) and into the second compartment (36) and directing it back into the cab (10) through the discharge ports (102,104,110,114) at a preselected pressure that is within a range of 0.398 to 0.439 KpA greater upon discharge from the second compartment (36) than the air that is drawn into the second compartment (36). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. In a cab (10) of a vehicle having a base portion (28), and a seat (26) supported by the base portion (28) to provide a location for an operator from which the vehicle may be controlled, an air circulatory system (32), comprising:
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a housing (30) having an air intake portion (34) and an air discharge portion (36) and being mounted to the base portion (28) in a manner to form a mounting platform for the seat (26); an inlet (70) defined by the housing (30) and being sufficient for communicating air circulating within the cab (10) into the air intake portion (34) of the housing (30) and being positioned rearwardly of the seat (26); a pair of fresh air passageways (48,50) having a first end portion (59) defining an opening (56) in each of a respective pair of opposing sidewalls (14,16) of the cab (10) and a second end portion (62) engaged with each of a respective opposing side (52,54) of the air intake portion (32) of the housing (30) to communicate ambient air from outside the cab (10) to mix with the air circulating within the cab (10), said fresh air passageways being positioned substantially in horizontal alignment with the housing (30); a filter assembly (74) mounted to the housing (30) in overlying relation to the inlet (70); means (76) for discharging air from the discharge portion (36) of the housing (30), said means (76) being positioned to communicate a flow of air from a pair of laterally spaced openings (86,88) defined in the discharge portion (36) of the housing (30) to a plurality of discharge ports (102,104,110,114) that are positioned forwardly of the seat (26) at a location that is adjacent a front wall of the cab and are spaced laterally from one another a distance at least substantially equal to the width of the seat (26); and a blower assembly (40) having a single motor (118) and a pair of fan members (122) positioned on opposite sides of the motor (118), said blower assembly (40) being mounted in the discharge portion (36) of the housing (30) with the fan members (122) aligned with the respective openings (86,88) defined in the discharge portion (36) of the housing (30), said blower assembly (40) being sufficient for drawing air through the filter assembly (74) and inlet (70) and into the discharge portion (36) of the housing (30) and directing air under pressure through the discharge means (76) to the discharge ports (102,104,110,112) in a manner wherein the air is circulated between the discharge ports (102,104,110,114) and the filter (74) in a generally circular pattern around the operator as he is positioned in the seat (26). - View Dependent Claims (14, 15, 16, 17, 18)
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Specification