Carpet cleaning wand having uniform air flow distribution
First Claim
1. A suction head, comprising:
- a substantially rigid conduit comprising an exhaust channel;
a substantially rigid body comprising a crown portion coupled to the conduit, and an intake opening formed between a pair of spaced apart lips adjacent to a foot portion thereof; and
a generally fan shaped suction channel internal of the body and extended between the intake opening thereof and the exhaust channel of the conduit, the suction channel comprising a non-uniform transverse cross section that increases in cross-sectional area substantially symmetrically outwardly from a central portion thereof and fairs smoothly into fluid communication with both the intake opening of the body and the exhaust channel of the conduit, wherein the central portion further comprises a transverse connecting channel smoothly faired between elongated ovoids that increase in area substantially symmetrically outwardly therefrom.
7 Assignments
0 Petitions
Accused Products
Abstract
A novel suction head for a carpet cleaning wand wherein either or both of two designs are utilized. Each design utilizes a generally fan shaped internal suction channel that fairs smoothly between an exhaust channel of substantially round cross section and lips of an intake opening having a much wider and substantially rectangular cross section. The internal suction channel utilized by one design is formed with a cross section that is non-uniform when viewed along the direction of air flow through the wand, which is a dramatic contrast to the uniform cross sections of known current designs. Another design utilizes an internal airfoil interrupting the internal suction channel along its centerline for diverting the air flow more towards the outside edges of the internal suction channel.
29 Citations
12 Claims
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1. A suction head, comprising:
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a substantially rigid conduit comprising an exhaust channel; a substantially rigid body comprising a crown portion coupled to the conduit, and an intake opening formed between a pair of spaced apart lips adjacent to a foot portion thereof; and a generally fan shaped suction channel internal of the body and extended between the intake opening thereof and the exhaust channel of the conduit, the suction channel comprising a non-uniform transverse cross section that increases in cross-sectional area substantially symmetrically outwardly from a central portion thereof and fairs smoothly into fluid communication with both the intake opening of the body and the exhaust channel of the conduit, wherein the central portion further comprises a transverse connecting channel smoothly faired between elongated ovoids that increase in area substantially symmetrically outwardly therefrom. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A suction head, comprising:
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a substantially rigid suction body portion having extended therefrom a substantially rigid tubular conduit comprising a substantially cylindrical exhaust channel, the body portion comprising; a crown portion adjacent to the conduit, a wide foot portion opposite from the crown portion and forming a pair of spaced apart lips coextensive with an intake opening thereinto, and a generally fan shaped suction channel formed internal of the body portion and extended between the crown portion thereof and the intake opening, the internal suction channel comprising an upper suction channel portion adjacent to the exhaust channel of the conduit being smoothly faired in fluid communication with the substantially cylindrical exhaust channel thereof, at least a portion of the upper suction channel portion further comprising a non-uniform cross section transverse of a flow path between the intake opening and the exhaust channel and smoothly increasing in spacing between opposing front and back wall surfaces of the upper suction channel outwardly from a central portion thereof; wherein the internal suction channel further comprises a curved throat portion rotating a portion thereof in fluid communication with the intake opening away from the upper suction channel portion. - View Dependent Claims (9, 10)
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11. A suction head, comprising:
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a substantially rigid tubular conduit comprising a substantially cylindrical exhaust channel formed therethrough; a substantially rigid body extended from the conduit adjacent to one end thereof, the body being generally fan shaped and further comprising; a crown portion joined to the conduit adjacent to one end of the exhaust channel formed therethrough, a foot portion wider than the crown portion and positioned opposite therefrom, the foot portion comprising a pair of spaced apart front and back walls forming an intake opening thereinto between spaced apart lips formed coextensively therewith, an inversely arched upper body portion substantially smoothly joined to the crown portion opposite from the conduit, and a neck portion curved substantially oppositely of the inversely arched upper body portion and rotating the foot portion away therefrom; and a generally fan shaped suction channel formed internal of the body portion and extended between the crown portion and intake opening thereof, the internal suction channel comprising; an exhaust outlet within the crown portion of the body, the outlet being formed substantially coextensive with the exhaust channel formed through the conduit and being substantially smoothly faired in fluid communication therewith, an inversely arched upper suction channel portion within the inversely arched upper body portion adjacent to the exhaust channel of the conduit, the inversely arched upper suction channel portion being smoothly faired in fluid communication with the exhaust outlet, and at least a portion of the upper suction channel portion further comprising a non-uniform cross section transverse of a flow path between the intake opening and the outlet and comprising a pair of elongated ovoids interconnected by a connecting channel narrower than the ovoids and continuously conjoined therewith through a first pair of outwardly curving surfaces on a first wall surface of the internal suction channel and a second pair of oppositely outwardly curving surfaces on an opposite second wall surface thereof, a base suction channel portion within the foot portion of the body, the base suction channel portion being smoothly faired in fluid communication with the inversely arched upper suction channel portion opposite from the outlet, and being formed substantially coextensive with the intake opening and being substantially smoothly faired in fluid communication therewith, and a curved throat suction channel portion within the curved neck portion of the body, the curved throat suction channel portion being smoothly faired in fluid communication between the base suction channel portion and the inversely arched upper suction channel portion, and being curved substantially oppositely of the inversely arched upper suction channel portion and rotating the base suction channel portion away therefrom. - View Dependent Claims (12)
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Specification