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US 4,086,847 AGranted
Multi-position duct system
AssigneeHawley Manufacturing Corporation
InventorRobert C. Overmyer
Life of this patent
Estimating the term…
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AssigneeHawley Manufacturing Corporation
InventorRobert C. Overmyer
Estimating the term…
A multi-position duct system includes a generally horizontally extending first duct section having one wall defined by a flexible web. The first duct section has first and second ends and is pivotally mounted adjacent its first end for movement in a horizontal arc about a support member. A car is mounted on the first duct section for longitudinal movement. The car engages the flexible web to define within the car a chamber in open communication with the interior of the first duct section. A second telescoping duct section having vertically upper and lower ends is attached at its upper end to the car and moves therewith longitudinally of the first duct section. The second duct section also is in open communication with the chamber. A hood for collecting air containing pollutant fumes and particles is attached to the lower end of the second duct section. The first duct section is attached to a source of suction. The hood can be positioned at a selected vertical height a selected distance from the support member to withdraw pollutant-laden air from a work area.
An exhaust apparatus comprising a conduit including an elongated duct having proximal and distal ends and a longitudinal wall closed by a flexible web, the conduit further including a car mounted on the duct for movement longitudinally thereof, the car cooperating with the web to define within the car a chamber communicating with the interior of the duct, means for coupling the duct to a source of suction, and means for supporting the duct adjacent its proximal end for pivotal movement in a generally horizontal plane.
A multi-position support system for an exhaust hood comprising a generally horizontally extending first conduit, a generally vertically extending second conduit for coupling the hood to the first conduit, means for supporting the first and second conduits and the hood, means for coupling the first conduit to a suction source, the first conduit having first and second ends and being attached to the support means adjacent its first end for pivotal movement about the support means in a generally horizontal plane, the second conduit having a first vertically upper end and a second vertically lower end, means for coupling the first end of the second conduit to the first conduit for movement longitudinally thereof, and means for coupling the second end of the second conduit to the hood, the first conduit comprising an elongated duct having at least one wall closed by a flexible web, said means for coupling the first end of the second conduit to the first conduit including a car mounted for movement longitudinally of the duct, the car cooperating with the web to define within the car a chamber communicating with the interior of the first conduit.
Dependencies are inferred from the claim text.