US3604042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe-cleaning tool
Assignee: Individual
•
Filing: 1969-10-23
•
Granted: 1971-09-14
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Expires: 1989-10-23
Abstract
Abstract A cleaning device for removing fibrous material from the internal surface of a pipe comprises a rotary head adapted to be driven by a motor and to be towed through the pipe by a cable. The rotary head comprises a frame around which are distributed four scraper assemblies and four flexible combs. Each scraper assembly consists of a series of coaxial, freely rotatable cutting wheels each having a scraping edge and mounted on a shaft extending parallel to and spaced from the axis of the frame; the scraper assemblies are spring-biased away from said axis into engagement with the pipe surface.
Inventors
- 👤 Raymond Muir Bremner
- 👤 James M Frew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:18
CPC Classifications
E; E03; E03F; E03F9/00; E03F9/002; B; B08; B08B; B08B9/00; B08B9/02; B08B9/027; B08B9/04; B08B9/043; B08B9/045
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
162 words
A rotary device for cleaning the internal surface of a pipe, comprising: a. a frame having a longitudinal axis, said frame providing a plurality of radially extending guide members, b. swivel means at one end of the frame for connecting a tow cable to the device; c. coupling means at the other end of the frame for coupling the device to a drive motor for rotating the device about said axis; d. a plurality of scraper assemblies distributed around said axis, each scraper assembly consisting of i. a rigid subframe, ii. a shaft mounted on said subframe and extending parallel to and spaced radially from said longitudinal axis, iii. a plurality of coaxial, freely rotatable cutter wheels each having a scraping edge, mounted on said shaft, e. means connecting each of said subframes to a respective guide member for permitting limited radial movement thereof; and f. spring means bearing on the subframes for biassing the scraper assemblies radially away from said axis.
Claim 2
Dependent Claim
162 words
A rotary device for cleaning the internal surface of a pipe, comprising: a. a frame having a longitudinal axis, said frame providing a plurality of radially extending guide members, b. swivel means at one end of the frame for connecting a tow cable to the device; c. coupling means at the other end of the frame for coupling the device to a drive motor for rotating the device about said axis; d. a plurality of scraper assemblies distributed around said axis, each scraper assembly consisting of i. a rigid subframe, ii. a shaft mounted on said subframe and extending parallel to and spaced radially from said longitudinal axis, iii. a plurality of coaxial, freely rotatable cutter wheels each having a scraping edge, mounted on said shaft, e. means connecting each of said subframes to a respective guide member for permitting limited radial movement thereof; and f. spring means bearing on the subframes for biassing the scraper assemblies radially away from said axis.
Claim 3
Dependent Claim
57 words
A rotary device as claimed in claim 1, wherein each guide member comprises a pair of parallel, longitudinally extending plates defining a channel, said plates being formed with parallel, radially extending elongated guide slots, and wherein each subframe is retained in the respective channel by pins connected to the subframe and extending laterally through the guide slots.
Claim 4
Dependent Claim
71 words
A rotary device as claimed in claim 1, further characterized by a plurality of longitudinally extending combs distributed around said axis, each comb consisting of a row of flexible blades extending radially from the frame and means for securing the blades at one end to the frame, the blades being of such a length as to bear at their free ends against the inner surface of the pipe to be cleaned.
Claim 5
Dependent Claim
35 words
A rotary device as claimed in claim 3, having four said scraper assemblies and four said combs, the scraper assemblies and combs being distributed around said longitudinal axis so as to alternate with one another.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |