Patent US4492002A successfully refreshed from Google Patents.
US4492002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floor cleaning machine
Assignee: Tennant Co
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Filing: 1983-04-22
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Granted: 1985-01-08
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Expires: 2003-04-22
Abstract
Abstract An automatic floor cleaning machine includes a unitary, self-contained and propelled, power driven body mounting from front to rear in a normal cleaning direction of travel: a propulsion mechanism including drive wheels and guide wheels for dry tracking on the floor surface to be cleaned, a scrubber mechanism including a pair of rearwardly disposed, vertically articulated counter-rotating magnetically and floatably mounted brushes for wetting and cleaning such floor surface, a vacuum mechanism including a vertically and horizontally articulated quick-detachable squeegee for drying of and proper tracking on the cleaned surface, and a combined mechanical and electrical control system operatively associated with each of such propulsion, scrubber and vacuum mechanisms, for convenient actuation by a walk-behind operator to control actuation of such machine. Preferably, a sweeper mechanism is mounted on the body forwardly of the propulsion mechanism and operatively associated with such control system for advance sweeping of a debris-laden floor surface.
Inventors
- 👤 Steven J. Waldhauser
- 👤 Dennis J. Corneil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:57
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/4052; A47L11/4058; A47L11/29; A47L11/30; A47L11/4002; A47L11/4005; A47L11/4011; A47L11/4036; A47L11/4044; A47L11/4063; A47L11/4066; A47L11/4069
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
154 words
A floor cleaning machine including a body; propulsion means capable of propelling said body in a generally forward direction over the surface of the floor to be cleaned; scrubber means carried by said body for wetting and cleaning a width of the surface of the floor, said scrubber means including brush means; and vacuum means carried by said body for drying the cleaned surface, said vacuum means including a curved squeegee of a width slightly greater than the width of the surface of the floor cleaned by said brush means, and means mounting said squeegee immediately behind said brush means for swinging movement in response to turning movement of the floor cleaning machine about a generally vertically extended axis which passes through the mid portion of said brush means, whereby said squeegee properly tracks said brush means to insure that virtually all water deposited on the floor by the scrubber means is picked up.
Claim 2
Dependent Claim
154 words
A floor cleaning machine including a body; propulsion means capable of propelling said body in a generally forward direction over the surface of the floor to be cleaned; scrubber means carried by said body for wetting and cleaning a width of the surface of the floor, said scrubber means including brush means; and vacuum means carried by said body for drying the cleaned surface, said vacuum means including a curved squeegee of a width slightly greater than the width of the surface of the floor cleaned by said brush means, and means mounting said squeegee immediately behind said brush means for swinging movement in response to turning movement of the floor cleaning machine about a generally vertically extended axis which passes through the mid portion of said brush means, whereby said squeegee properly tracks said brush means to insure that virtually all water deposited on the floor by the scrubber means is picked up.
Claim 3
Dependent Claim
199 words
An automatic, self-contained and self-propelled walk behind floor cleaning machine including a body; propulsion means capable of propelling said body in a generally forward direction over the surface of the floor to be cleaned, said propulsion means including ground engaging wheels; scrubber means carried by said body for wetting and cleaning a width of the surface of the floor, said scrubber means including brush means, and said scrubber means being mounted behind said ground engaging wheels; vacuum means carried by said body for drying the cleaned surface, said vacuum means including a curved squeegee of a width slightly greater than the width of the surface of the floor cleaned by said brush means, and means mounting said squeegee immediately behind said brush means and for swinging movement about a generally vertically extending axis in response to turning movement of the floor cleaning machine whereby said squeegee properly tracks said brush means to insure that virtually all water deposited on the floor by the scrubber means is picked up; and control means operably associated with said propulsion means, scrubber means and vacuum means and including controls located to the rear of the body and engageable by a walk behind operator.
Claim 4
Dependent Claim
199 words
An automatic, self-contained and self-propelled walk behind floor cleaning machine including a body; propulsion means capable of propelling said body in a generally forward direction over the surface of the floor to be cleaned, said propulsion means including ground engaging wheels; scrubber means carried by said body for wetting and cleaning a width of the surface of the floor, said scrubber means including brush means, and said scrubber means being mounted behind said ground engaging wheels; vacuum means carried by said body for drying the cleaned surface, said vacuum means including a curved squeegee of a width slightly greater than the width of the surface of the floor cleaned by said brush means, and means mounting said squeegee immediately behind said brush means and for swinging movement about a generally vertically extending axis in response to turning movement of the floor cleaning machine whereby said squeegee properly tracks said brush means to insure that virtually all water deposited on the floor by the scrubber means is picked up; and control means operably associated with said propulsion means, scrubber means and vacuum means and including controls located to the rear of the body and engageable by a walk behind operator.
Claim 5
Dependent Claim
32 words
The floor cleaning machine as set forth in claim 1 or 2 wherein the means mounting said squeegee includes a ball joint construction disposed immediately above a midportion of said brush means.
Claim 6
Dependent Claim
57 words
The floor cleaning machine as set forth in claim 1 or 2 wherein said brush means includes a pair of rotary brushes rotatable about vertical axes, each rotary brush being driven by an electric motor mounted above said brush, and wherein the means of mounting the squeegee includes a pivot assembly disposed midway between said electric motors.
Claim 7
Dependent Claim
32 words
The floor cleaning machine as set forth in claim 4 further characterized by provision of first and second means capable of raising and lowering said scrubber means and said curved squeegee, respectively.
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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) | 1988-01-08 | 1988-07-09 | 1989-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-08 | 1992-07-09 | 1993-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-08 | 1996-07-09 | 1997-01-08 | $7700.00 | Window Closed / Lapsed |