US3817649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe scarfing tool
Assignee: SMITH FIBERGLASS PRODUCTS Inc A DE CORP
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Filing: 1972-12-13
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Granted: 1974-06-18
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Expires: 1992-12-13
Abstract
Abstract In a pipe scarfing tool, a rotatable housing is provided in which a plurality of cutting blades are included. The cutting blades are generally radially oriented and extend longitudinally at an angle with respect to the rotational axis of the housing. The cutting blades are readily removable and replaceable and are provided with four longitudinal edges each of which is a cutting edge. The aforementioned Abstract is neither intended to define the invention of the application which, of course, is measured by the claims, nor is it intended to be limiting as to the scope of the invention in any way.
Inventors
- 👤 J Medney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:56
CPC Classifications
B; B23; B23B; B23B5/00; B23B5/16; B23B5/167; B23B5/168; Y; Y10; Y10T; Y10T408/00; Y10T408/89; Y10T408/899; Y10T82/00; Y10T82/22
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
167 words
A pipe scarfing tool adapted to be driven by a power tool, said pipe scarfing tool comprising: a. a shaft adapted to be secured to the power tool for rotation thereby; b. a pilot piece mounted on and rotatable with respect to said shaft, the outer surface of said pilot piece being concentric with the rotational axis of said shaft and adapted to frictionally engage the inside diameter of the pipe to be scarfed; c. a hollow, cup shaped housing at least partially surrounding said pilot piece and rigidly secured to said shaft for rotation together therewith, said housing including at least two longitudinally extending interior seats positioned at an angle with respect to rotational axis of said shaft; and d. a generally radially oriented, elongated cutting blade secured to each said seats whereby the cutting edge of each said blade extends at a predetermined negative rake angle with respect to the rotational axis of said shaft and is off the diametric center line of said housing.
Claim 2
Dependent Claim
167 words
A pipe scarfing tool adapted to be driven by a power tool, said pipe scarfing tool comprising: a. a shaft adapted to be secured to the power tool for rotation thereby; b. a pilot piece mounted on and rotatable with respect to said shaft, the outer surface of said pilot piece being concentric with the rotational axis of said shaft and adapted to frictionally engage the inside diameter of the pipe to be scarfed; c. a hollow, cup shaped housing at least partially surrounding said pilot piece and rigidly secured to said shaft for rotation together therewith, said housing including at least two longitudinally extending interior seats positioned at an angle with respect to rotational axis of said shaft; and d. a generally radially oriented, elongated cutting blade secured to each said seats whereby the cutting edge of each said blade extends at a predetermined negative rake angle with respect to the rotational axis of said shaft and is off the diametric center line of said housing.
Claim 3
Dependent Claim
19 words
The tool in accordance with claim 1 wherein there are two of said blades diametrically opposed to each other.
Claim 4
Dependent Claim
17 words
The tool in accordance with claim 2 wherein each said blades has a plurality of cutting edges.
Claim 5
Dependent Claim
15 words
The tool in accordance with claim 2 wherein each said blades has four cutting edges.
Claim 6
Dependent Claim
23 words
The tool in accordance with claim 1 wherein there are at least three of said blades equally spaced apart in an angular direction.
Claim 7
Dependent Claim
17 words
The tool in accordance with claim 5 wherein each said blades has a plurality of cutting edges.
Claim 8
Dependent Claim
15 words
The tool in accordance with claim 5 wherein each said blades has four cutting edges.
Claim 9
Dependent Claim
21 words
The tool in accordance with claim 1 further including clamp means for removably securing each said blades to its respective seat.
Claim 10
Dependent Claim
29 words
The tool in accordance with claim 8 wherein said housing includes openings through the wall thereof for providing access to said blades whereby said blades may be readily interchanged.
Claim 11
Dependent Claim
17 words
The tool in accordance with claim 1 wherein said shaft is rotatably journaled in said pilot piece.
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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |