Patent Application
20080115310
1. Field of the Invention
This invention relates generally to central vacuum cleaners and, more particularly, to a central vacuum cleaner with a nested packaging configuration.
2. Description of Related Art
Central vacuum cleaner systems are well known and in wide use. A conventional system typically includes a power unit (including the vacuum motor and dust receptacle), tubes or pipes plumbed throughout the house (typically inside the house walls), outlets at various locations throughout the house, and a vacuum tool(s) that connects to the outlet, typically via a long, flexible hose. The vacuum tool may be, for example, a powered carpet brush with a beater bar and lamp, an extension wand, a crevice tool, an upholstery tool, and so on.
In use, one end of the hose is connected to a wall outlet and the other end is connected to a tool. The power unit is then activated and the area within reach of the flexible hose and tool may be cleaned. Dirt, dust and debris is sucked through the hose, through the tubes or pipes and to the power unit where it is filtered and collected.
In order to provide sufficient vacuum power, filtering capability, dirt and debris collection volume, and to minimize leakage, the central vacuum power unit tends to be quite large. Conventional power units are built and shipped as a single unitary piece with a typical diameter in a range of 12-16 inches and a height in a range of 30-48 inches. Much of this volume is empty and is used only for airflow. An item of this size is very bulky and cumbersome to handle, especially when packaged. In addition, the costs associated with shipping such a large, cumbersome, air-filled item can be excessive.
In view of these drawbacks of conventional central vacuum power units, there is a strong need for a central vacuum power unit that could be packaged and shipped in a more compact and efficient manner.
The present invention provides a nested packaging design and method for compact and efficient packaging of a power unit of a central vacuum cleaner. The power unit is divided into components or sections that can be disassembled and nested together for shipping and handling in a much smaller configuration. The disassembled, nested and packaged central vacuum power unit of the present invention is approximately half the size of the assembled unit. Shipping, handling and storage issues associated with conventional central vacuum cleaners are minimized or eliminated by the present invention.
Accordingly, one embodiment of the invention is a central vacuum power unit comprising at least two functional and separate components. The components are attached in a stacked assembly during operation, and are detachable for configuration in a nested assembly during non-operation.
Another embodiment of the invention is a nested packaging assembly for a central vacuum power unit. The assembly includes a cylindrical body module, a dust bucket nested within the body module, and a motor module nested within the dust bucket.
Another embodiment of the invention is a method for packaging a central vacuum cleaner for transit or storage. At least two functional components of the vacuum cleaner are detached and nested within each other.
Another embodiment of the invention is a method for operation of a central vacuum cleaner. The method comprises stacking a motor module above a body module, and the body module above a dust bucket, for vacuuming operations; and nesting the motor module within the dust bucket, and the dust bucket within the body module, for shipment or storage.
Other features and advantages of the invention will be apparent from the following detailed description, taken in conjunction with the accompanying drawings which illustrate, by way of example, various features of embodiments of the invention,
Since the components are essentially stacked one on top of the other, the assembled configuration of
Body module 20 is the largest section of the power unit and is essentially a large cylinder or canister. As will be described below, the large empty volume of body module 20 is necessary to hold and accommodate inflation and deflation of a vacuum filter bag or media 15 attached therein. It comprises an upper metal tube or wrapper 24 and a lower skirt 25. A vacuum inlet 10 and utility port 11 are formed in, or defined by, skirt 25. Slide latches 21 are attached to, or formed integrally with, skirt 25 for holding dust bucket 30 in place. In one embodiment, skirt 25 comprises two plastic, semi-circular components. Filter 15 (
Motor module 40 is attached above body module 20. For ease of repair and replacement, all factory serviceable electronics and active mechanical components are housed within module 40, including a vacuum motor 17 and associated electrical controls and mounting hardware. Motor 17 is a conventional motor mounted and configured for operation within module 40 in a manner familiar to those of ordinary skill in the art. User interface 41 is formed on the exterior of module 40, and may include items such as an on/off switch, a debris level indicator, a motor service indicator, a motor power indicator and a vacuum level indicator. Motor module also includes an air passage and an exhaust port to exhaust air flowing upward from body module 20. A detachable or integrally-formed muffler 18 is typically provided on the exterior of module 40 around the exhaust port. A secondary filter 16 may also be provided in motor module 40.
Dust bucket 30 is attached below body module 20 to capture and accumulate dirt, debris, etc. that is removed by filter 15 from the air flowing through power unit 50. Dust bucket 30 may be attached and configured in alternative ways that are known or will be apparent to those of skill in the art. Importantly, where a filter 15 is interposed between an air inlet 10 and outlet 18, the dust bucket 30 should be configured and oriented in a manner that captures dirt and debris that filter 15 removes from the airflow.
Central vacuum power unit 50 is typically assembled on site at the time of installation. When completely assembled, body module 20 may be attached or hung on a wall or other structure, with motor module 40 attached above body module 20 and dust bucket 30 attached below body module 20. This design assures that, when assembled on site, all modules are properly aligned to compress gaskets that are integral to the modules and prevent or minimize leakage during operation of unit 50.
During operation of motor 17, as shown in
When motor 17 is turned off, as shown in
Two slide latches 21 couple dust bucket 30 to body module 20. When dust bucket 30 becomes full of dust and debris, latch levers 21 formed on the upper portions of latches 21 are rotated down, thereby lowering latch hooks 23 formed on the lower portions of latches 21. With hooks 23 lowered, bucket 30 can be removed and emptied of the dust and debris collected therein. Once emptied, bucket 30 is reattached by placing it on hooks 23 and rotating latch levers 22 upward to raise hooks 23 and secure bucket 30 below body module 20.
The components of power unit 50 are easily disassembled and nested together for storage or packaging and shipping. As shown in
Motor module 40, which is the heaviest and most dense component, is placed at the bottom in an upright orientation. Next, dust bucket 30 is flipped upside down and placed over motor module 40, which nests within the hollow interior of bucket 30. Lastly, body module 20 is placed over and around bucket 30 in an upright orientation to yield the compactly nested configuration illustrated in
The nested packaging configuration illustrated in
Other components and accessories associated with power unit 50, such as the detached muffler 18, associated mounting hardware, wall mounting plates and pipe/hose attachment items, can be placed inside of body module 20 on top of dust bucket 30. In this manner, they do not cause an increase in the packaging size. Other packaging items such as plastic bags, cardboard and foam inserts, etc., can be added to the stack to prevent damage during shipping.
The particular embodiments of the invention described in this document should be considered illustrative, rather than restrictive. Modification to the described embodiments may be made without departing from the spirit of the invention as defined by the following claims.
