US3772732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rug duster
Assignee: Laundry Machine Specialties Corp
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Filing: 1971-06-16
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Granted: 1973-11-20
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Expires: 1991-06-16
Abstract
Abstract A rug duster removes dust and the like from rugs and mats by the action of brushes, beating bars, spreader bars and vacuum. Rugs are passed through feed rolls and over a beater roll with raised beater bars which flex the rugs'' backings and open the rugs'' naps. While the naps are open, a brush and vacuum remove dust and lint. The naps are further opened by flexure bars at the exit of a vacuum chamber which are spaced apart and have their axes in line with the path of the rug to flex the rug and develop a sinuous flex.
Inventors
- 👤 J Gilmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:20
CPC Classifications
D; D06; D06G; D06G1/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
327 words
A rug duster comprising: a. a housing; b. a pair of parallel pinch rolls in the housing for gripping a rug therebetween and to control the speed of passage of a rug through the machine; c. means for rotating the pinch rolls at a predetermined peripheral speed; d. a rug beater rotatably mounted in the housing adjacent the exit side of the pinch rolls comprising a cylinder extending parallel to the pinch rolls and a plurality of raised rigid portions on the surface of the cylinder for contacting the backing of a rug; e. means for rotating the cylinder of the rug beater at a predetermined peripheral speed higher than the peripheral speed of the pinch rolls; f. a cylindrical brush adjacent the rug beater and disposed relative to the rug beater for passage of a rug between them, the bristles of the brush being arranged to engage the nap of a rug in the same region of a rug contacted by the raised portions; g. means for rotating the cylindrical brush at a predetermined peripheral speed higher than the peripheral speed of the pinch rolls; h. the pinch rolls, rug beater, and brush at least partly defining a rug path through the rug dusting machine; i. a vacuuming chamber surrounding the brush and adjacent at least a portion of the rug path; j. means for creating a vacuum in the vacuuming chamber; and k. a plurality of side-by-side and spaced-apart bars in the rug path on the exit side of the vacuuming chamber with the axes of the bars oriented along the path of movement of a rug and the bars extending into the path of the bristles of the brush, the bars being positioned to develop a sinuous flexing in a rug passing over them with the sinuous flexure being transverse to the direction of rug travel, the bars also being in position such that the sinuously flexed rug experiences vacuum from the vacuuming chamber.
Claim 2
Dependent Claim
327 words
A rug duster comprising: a. a housing; b. a pair of parallel pinch rolls in the housing for gripping a rug therebetween and to control the speed of passage of a rug through the machine; c. means for rotating the pinch rolls at a predetermined peripheral speed; d. a rug beater rotatably mounted in the housing adjacent the exit side of the pinch rolls comprising a cylinder extending parallel to the pinch rolls and a plurality of raised rigid portions on the surface of the cylinder for contacting the backing of a rug; e. means for rotating the cylinder of the rug beater at a predetermined peripheral speed higher than the peripheral speed of the pinch rolls; f. a cylindrical brush adjacent the rug beater and disposed relative to the rug beater for passage of a rug between them, the bristles of the brush being arranged to engage the nap of a rug in the same region of a rug contacted by the raised portions; g. means for rotating the cylindrical brush at a predetermined peripheral speed higher than the peripheral speed of the pinch rolls; h. the pinch rolls, rug beater, and brush at least partly defining a rug path through the rug dusting machine; i. a vacuuming chamber surrounding the brush and adjacent at least a portion of the rug path; j. means for creating a vacuum in the vacuuming chamber; and k. a plurality of side-by-side and spaced-apart bars in the rug path on the exit side of the vacuuming chamber with the axes of the bars oriented along the path of movement of a rug and the bars extending into the path of the bristles of the brush, the bars being positioned to develop a sinuous flexing in a rug passing over them with the sinuous flexure being transverse to the direction of rug travel, the bars also being in position such that the sinuously flexed rug experiences vacuum from the vacuuming chamber.
Claim 3
Dependent Claim
90 words
The rug duster claimed in claim 1 wherein: the means for rotating the rug beater comprises a motor operatively connected to a first end of the cylinder for rotation thereof; the means for rotating the brush comprises drive means operatively interconnecting the second end of the cylinder with an end oF the brush for rotation thereof simultaneously with rotation of the rug beater; and the means for rotating the pinch rolls comprises speed reduction means operatively driven by the second end of the cylinder and drive-connected to the pinch rolls.
Claim 4
Dependent Claim
55 words
The rug duster claimed in claim 1 wherein: a plurality of rows of rollers, each row having a plurality of rollers in it, the rows of rollers being oriented in the horizontal on the exit side of the rug duster immediately adjacent the bars, with the bars being between the vacuuming chamber and the rollers.
Claim 5
Dependent Claim
242 words
An improved rug duster comprising: a. a housing; b. means defining a vacuum chamber in the housing; c. means for creating a vacuum in the vacuum chamber; d. means to feed a rug towards the vacuum chamber; e. a beater roller having a plurality of rigid protrusions for engaging and flexing the backing of a rug, the beater roller being rotatably mounted in the housing in position for the protrusions to engage the rug backing; f. a bristled brush rotatably mounted in the vacuum chamber in position for the rug to pass between the brush and the beater roller with the bristles of the brush engaging the nap of the rug while the beater roller engages the backing of the rug opposite the nap being engaged by the bristles so that the nap is opened by the beater bars for brushing by the bristles; g. means for driving the beater roller and the brush in rotation in a directional sense to advance the rug through the rug duster; and h. a plurality of parallel and spaced-apart bars at the exit from the vacuum chamber oriented with their axes along the direction of travel of the rug over them, the bars being in position to cause flexing of the rug passing over them in a generally sinuous pattern transverse to the direction of rug travel and for the nap of the rug over the bars to be in communication with the vacuum chamber.
Claim 6
Dependent Claim
242 words
An improved rug duster comprising: a. a housing; b. means defining a vacuum chamber in the housing; c. means for creating a vacuum in the vacuum chamber; d. means to feed a rug towards the vacuum chamber; e. a beater roller having a plurality of rigid protrusions for engaging and flexing the backing of a rug, the beater roller being rotatably mounted in the housing in position for the protrusions to engage the rug backing; f. a bristled brush rotatably mounted in the vacuum chamber in position for the rug to pass between the brush and the beater roller with the bristles of the brush engaging the nap of the rug while the beater roller engages the backing of the rug opposite the nap being engaged by the bristles so that the nap is opened by the beater bars for brushing by the bristles; g. means for driving the beater roller and the brush in rotation in a directional sense to advance the rug through the rug duster; and h. a plurality of parallel and spaced-apart bars at the exit from the vacuum chamber oriented with their axes along the direction of travel of the rug over them, the bars being in position to cause flexing of the rug passing over them in a generally sinuous pattern transverse to the direction of rug travel and for the nap of the rug over the bars to be in communication with the vacuum chamber.
Claim 7
Dependent Claim
32 words
The improved rug duster claimed in claim 4 including means for convexly curving the nap side of the rug for engagement of the convexly curved nap by the bristles of the brush.
Claim 8
Dependent Claim
21 words
The improved rug duster claimed in claim 4 wherein the bars extend into the path of the bristles of the brush.
Claim 9
Dependent Claim
21 words
The improved rug duster claimed in claim 5 wherein the bars extend into the path of the bristles of the brush.
Claim 10
Dependent Claim
19 words
The rug duster claimed in claim 7 wherein the beater roller and the brush rotate at different peripheral speeds.
Claim 11
Dependent Claim
63 words
The rug duster claimed in claim 8 wherein the rug feed means includes a pair of pinch rollers oriented for the rug to pass between them and to apply a force on the rug, the pinch rollers rotating at a slower peripheral speed than the beater roller and the brush to control the rate at which the rug advances through the rug duster.
Claim 12
Dependent Claim
25 words
The rug duster claimed in claim 9 wherein the means for creating a vacuum in the vacuum chamber includes at least two serially connected blowers.
Claim 13
Dependent Claim
33 words
The rug duster claimed in claim 9 wherein a plurality of rollers for supporting an exiting rug are disposed adjacent the bars with the bars being between the vacuum chamber and the rollers.
Claim 14
Dependent Claim
171 words
An improved rug duster comprising: a. a housing; b. means defining a vacuum chamber in the housing; c. means for creating a vacuum in the vacuum chamber; d. means to feed a rug towards the vacuum chamber; e. a beater roller having a plurality of rigid protrusions for engaging and flexing the backing of a rug, the beater roller being rotatably mounted in the housing in position for the protrusions to engage the rug backing; f. a bristle brush rotatably mounted in the vacuum chamber in position for the rug to pass between the brush and the beater roller with the bristles of the brush engaging the nap of the rug on the opposite side of and simultaneously with the engagement of the backing of the rug by the beater roller; g. means for driving the beater roller and the brush in rotation in a directional sense to advance the rug to tHe rug duster; and h. means for drawing air into the vacuum chamber through the nap of the rug.
Claim 15
Dependent Claim
171 words
An improved rug duster comprising: a. a housing; b. means defining a vacuum chamber in the housing; c. means for creating a vacuum in the vacuum chamber; d. means to feed a rug towards the vacuum chamber; e. a beater roller having a plurality of rigid protrusions for engaging and flexing the backing of a rug, the beater roller being rotatably mounted in the housing in position for the protrusions to engage the rug backing; f. a bristle brush rotatably mounted in the vacuum chamber in position for the rug to pass between the brush and the beater roller with the bristles of the brush engaging the nap of the rug on the opposite side of and simultaneously with the engagement of the backing of the rug by the beater roller; g. means for driving the beater roller and the brush in rotation in a directional sense to advance the rug to tHe rug duster; and h. means for drawing air into the vacuum chamber through the nap of the rug.
Claim 16
Dependent Claim
32 words
The improved rug duster claimed in claim 12 including means for convexly curving the nap side of the rug for engagement of the convexly curved nap by the bristles of the brush.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |