US4019218A — Carpet soil extractor

Claim 1

Independent Claim 194 words

A self contained carpet soil extractor for cleaning carpets, said soil extractor including a carrier, a wand and a hose assembly for interconnecting said carrier with said wand, said carrier having: (i) a first tank for storing a cleaning solution; (ii) a hinged cover extending across an upper opening of the first tank; (iii) a second tank for receiving waste water; (iv) a hinged sealable cover extending across an upper opening of the second tank; (v) a pump assembly for pumping the cleaning solution from the first tank under pressure; (vi) a vacuum pump assembly for creating a vacuum within the second tank; (vii) a power cord for transmitting electrical power to the pump assembly and the vacuum pump assembly from a source of electrical power; and (viii) wheels for transporting said carrier across a surface, said soil extractor comprising in combination: a. said wand including a one piece head for supporting: 1. means for dispensing the cleaning solution into the carpet; 2. vertically reciprocable brush means for agitating the pile of the carpet; 3. mouth means for drawing a mixture of the cleaning solution and dirt from the pile of the carpet; and

Claim 2

Dependent Claim 194 words

A self contained carpet soil extractor for cleaning carpets, said soil extractor including a carrier, a wand and a hose assembly for interconnecting said carrier with said wand, said carrier having: (i) a first tank for storing a cleaning solution; (ii) a hinged cover extending across an upper opening of the first tank; (iii) a second tank for receiving waste water; (iv) a hinged sealable cover extending across an upper opening of the second tank; (v) a pump assembly for pumping the cleaning solution from the first tank under pressure; (vi) a vacuum pump assembly for creating a vacuum within the second tank; (vii) a power cord for transmitting electrical power to the pump assembly and the vacuum pump assembly from a source of electrical power; and (viii) wheels for transporting said carrier across a surface, said soil extractor comprising in combination: a. said wand including a one piece head for supporting: 1. means for dispensing the cleaning solution into the carpet; 2. vertically reciprocable brush means for agitating the pile of the carpet; 3. mouth means for drawing a mixture of the cleaning solution and dirt from the pile of the carpet; and

Claim 3

Dependent Claim 195 words

support means for aiding in the transport of said wand across the pile of the carpet; b. said hose assembly including: 1. a first hose for conveying the cleaning solution from the pump assembly to said dispensing means within said wand; and 2. a second hose for interconnecting the second tank with said mouth means within said wand; c. said carrier including: 1. switch means for energizing the pump assembly to convey the cleaning solution under pressure from the first tank through said hose assembly to said dispensing means and for energizing the vacuum pump assembly to establish a vacuum within the second tank and draw the mixture of cleaning solution and dirt into said mouth means within said wand, through said second hose and into the waste tank; and 2. hinge means for pivotally securing the waste tank to said carrier and accommodating tipping of the second tank to empty it; and d. normally closed valve means disposed within said wand for regulating the flow of cleaning solution from said first hose assembly through said dispensing means without affecting the continuing recovery of the mixture of cleaning solution and dirt to dry the carpet.

Claim 4

Dependent Claim 195 words

support means for aiding in the transport of said wand across the pile of the carpet; b. said hose assembly including: 1. a first hose for conveying the cleaning solution from the pump assembly to said dispensing means within said wand; and 2. a second hose for interconnecting the second tank with said mouth means within said wand; c. said carrier including: 1. switch means for energizing the pump assembly to convey the cleaning solution under pressure from the first tank through said hose assembly to said dispensing means and for energizing the vacuum pump assembly to establish a vacuum within the second tank and draw the mixture of cleaning solution and dirt into said mouth means within said wand, through said second hose and into the waste tank; and 2. hinge means for pivotally securing the waste tank to said carrier and accommodating tipping of the second tank to empty it; and d. normally closed valve means disposed within said wand for regulating the flow of cleaning solution from said first hose assembly through said dispensing means without affecting the continuing recovery of the mixture of cleaning solution and dirt to dry the carpet.

Claim 5

Dependent Claim 59 words

The soil extractor as set forth in claim 1 wherein said dispensing means comprises a plenum chamber disposed within said head, an inlet orifice assembly for introducing the cleaning solution to said plenum chamber from said first hose and a plurality of outlet nozzles for discharging the cleaning solution from said plenum chamber into the pile of the carpet.

Claim 6

Dependent Claim 30 words

The soil extractor as set forth in claim 2 wherein said outlet nozzles are oriented toward said brush means for discharging the cleaning solution in proximity to said brush means.

Claim 7

Dependent Claim 43 words

The soil extractor as set forth in claim 2 wherein said mouth means includes a fan-shaped passageway having a slot shaped inlet defining said mouth means and an outlet disposed at the apex of said passageway in fluid communication with said second hose.

Claim 8

Dependent Claim 42 words

The soil extractor as set forth in claim 4 wherein said brush means includes: a. a plurality of downwardly oriented bristles; and b. resilient plate means for maintaining general vertical orientation of said bristles while accommodating reciprocal vertical movement of said bristles.

Claim 9

Dependent Claim 32 words

The soil extractor as set forth in claim 5 wherein said support means comprises a pivot point for bringing said head into and out of engagement with the pile of the carpet.

Claim 10

Dependent Claim 69 words

The soil extractor as set forth in claim 6 wherein said head extends in one direction transverse to the pivotal axis of said support means and wherein said wand includes a handle extending from said head for manually directing said wand across the carpet, said handle being extended in another direction transverse to the axis of said support means and opposite to the direction of extension of said head.

Claim 11

Dependent Claim 35 words

The soil extractor as set forth in claim 7 wherein said head is of a greater weight than said handle for pivotally biasing said head about said support means toward the pile of the carpet.

Claim 12

Dependent Claim 29 words

The soil extractor as set forth in claim 8 including weight means disposed within said head for increasing the bias of said head against the pile of the carpet.

Claim 13

Dependent Claim 29 words

The soil extractor as set forth in claim 9 including a sight window in said wand for viewing the mixture of cleaning solution and dirt flowing through said wand.

Claim 14

Dependent Claim 34 words

The soil extractor as set forth in claim 8 wherein said mouth means, the lower extremity of said bristles and the lower extremity of said support means are generally disposed in a common plane.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1980-04-25	1980-10-25	1981-04-26	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1984-04-25	1984-10-25	1985-04-26	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1988-04-25	1988-10-25	1989-04-26	$7700.00	Window Closed / Lapsed

Carpet soil extractor

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