Patent US3141650A successfully refreshed from Google Patents.
Patent US4333200A successfully refreshed from Google Patents.
US4333200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chimney cleaner
Assignee: Individual
•
Filing: 1980-09-25
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Granted: 1982-06-08
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Expires: 2000-09-25
Abstract
Abstract A chimney cleaner device cleans the inside surfaces of a chimney in both an upward and downward direction. The device includes a pair of diverging cleaning arms made of heavy metal, each arm having an integral shank portion and blade portion. The blade portion has an outermost scraping edge and a beveled surface slanting inwardly from the cleaning edge to an end of the blade portion opposite the shank portion. The cleaning arms are pivotally connected at an end of the shank portion opposite the blade portion, and are biased outwardly about the pivotal connection in a diverging manner by a lateral force such that the scraping edges engage the inside surfaces of the chimney. The combination of the weight of the cleaning arms and the beveled surface are sufficient to overcome the lateral force allowing downward scraping of the chimney. Upward cleaning of the chimney is accomplished by simply pulling the device up the chimney.
Inventors
- 👤 Russel E. Thurow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:02
CPC Classifications
F; F23; F23J; F23J3/00; F23J3/02; F23J3/026
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
175 words
A chimney cleaner device for use in cleaning inside surfaces of a chimney in both an upward and downward direction, the device comprising: a pair of diverging cleaning arms, each cleaning arm having an integral upper shank portion and lower blade portion, the blade portion having an outermost scraping edge and a beveled surface slanting inwardly from the scraping edge to a lower end of the blade portion and the blade portion having most of the cleaning arm weight; pivotal connecting means for pivotally connecting the cleaning arms at an upper end of the shank portion; and biasing means for providing a lateral outward force to bias the blade portions of the cleaning arms outwardly about the pivotal connecting means in a diverging manner sufficient to bring the scraping edge into engagement with the inside surfaces of the chimney as the device is raised and lowered in the chimney with the weight of the combined cleaning arms overcoming the lateral force of the biasing means sufficiently to permit gravitational downward movement of the cleaner device.
Claim 2
Dependent Claim
175 words
A chimney cleaner device for use in cleaning inside surfaces of a chimney in both an upward and downward direction, the device comprising: a pair of diverging cleaning arms, each cleaning arm having an integral upper shank portion and lower blade portion, the blade portion having an outermost scraping edge and a beveled surface slanting inwardly from the scraping edge to a lower end of the blade portion and the blade portion having most of the cleaning arm weight; pivotal connecting means for pivotally connecting the cleaning arms at an upper end of the shank portion; and biasing means for providing a lateral outward force to bias the blade portions of the cleaning arms outwardly about the pivotal connecting means in a diverging manner sufficient to bring the scraping edge into engagement with the inside surfaces of the chimney as the device is raised and lowered in the chimney with the weight of the combined cleaning arms overcoming the lateral force of the biasing means sufficiently to permit gravitational downward movement of the cleaner device.
Claim 3
Dependent Claim
19 words
The device of claim 1 wherein the cleaning arms are each fabricated of cast iron as a unitary piece.
Claim 4
Dependent Claim
43 words
The device of claim 1 wherein the pivotal connecting means comprises a bolt extending through an aperture at an upper end of the shank portion of one arm and fixedly connected to an upper end of the shank portion of the other arm.
Claim 5
Dependent Claim
23 words
The device of claim 3 and further comprising an eyehook pivotally engaging the bolt between the shank portions for securing a line thereto.
Claim 6
Dependent Claim
31 words
The device of claim 1 wherein the biasing means is a coil spring held between the blade portions by approximately coaxial rods attached to the inside surfaces of the blade portions.
Claim 7
Dependent Claim
22 words
The device of claim 1 wherein the lateral cross-section of the blade portion is rectangular for use in cleaning rectangular shaped chimneys.
Claim 8
Dependent Claim
23 words
The device of claim 1 wherein the lateral outer surface of the blade portion is arcuate for use in cleaning circular shaped chimneys.
Claim 9
Dependent Claim
19 words
The device of claim 1 wherein the cleaning arms pivot symmetrically about a perpendicular plane through the pivotal connection.
Claim 10
Dependent Claim
15 words
The device of claim 1 wherein the weight of the device is approximately 113/4 pounds.
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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) | 1985-06-07 | 1985-12-07 | 1986-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-07 | 1989-12-07 | 1990-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-07 | 1993-12-07 | 1994-06-08 | $7700.00 | Window Closed / Lapsed |