US3812755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Product, preferably a rotatable working tool, e.g., a saw blade
Assignee: NORA GOMEX AB
•
Filing: 1971-12-14
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Granted: 1974-05-28
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Expires: 1991-12-14
Abstract
Abstract A rotatable working tool assembled of at least two parts which are intimately interconnected by a flue and adapted to eliminate oscillations; the glue may contain an electrically conductive material to enable spot welding of the parts together.
Inventors
- 👤 B Danielsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:38
CPC Classifications
B; B23; B23D; B23D65/00; B23D61/00; B23D61/02; B23D61/023; B23D61/025; B23D61/026; Y; Y10; Y10T; Y10T407/00; Y10T407/19; Y10T407/1904; Y10T407/28; Y10T83/00; Y10T83/929; Y10T83/9319
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
61 words
A rotatable working tool made up of at least two parts or portions, which are intimately interconnected and adapted to eliminate or damp the oscillations of each other, the parts forming in unison a disc like unit, wherein said parts are interconnected by a glue into which an electrically conductive material is dispersed, the parts being welded together by spot welds.
Claim 2
Dependent Claim
61 words
A rotatable working tool made up of at least two parts or portions, which are intimately interconnected and adapted to eliminate or damp the oscillations of each other, the parts forming in unison a disc like unit, wherein said parts are interconnected by a glue into which an electrically conductive material is dispersed, the parts being welded together by spot welds.
Claim 3
Dependent Claim
14 words
A tool in accordance with claim 1, wherein the glue is an epoxy glue.
Claim 4
Dependent Claim
18 words
A tool in accordance with claim 1, wherein the spot welds are disposed unsymmetrically about said disc area.
Claim 5
Dependent Claim
20 words
A tool in accordance with claim 1, wherein said parts are further soldered together along a circular peripheral area thereof.
Claim 6
Dependent Claim
15 words
A tool in accordance with claim 4 wherein the solder used is a silver solder.
Claim 7
Dependent Claim
46 words
A tool in accordance with claim 5 wherein said silver solder comprises 35 - 55 percent Ag and various contents of Cu, Zn, Cd and fluxing material, the silver solder having a melting temperature range of about 600*-625C., and a suitable soldering temperature of about 630*-640C.
Claim 8
Independent Claim
74 words
A method for manufacturing a rotatable cutting tool comprising two sheet portions fastened together, comprising the steps of a. mixing into a glue an electrically conductive material which is dispersed into the glue, b. glueing together the sheets with the product of said mixing step, and c. spot welding the sheet portions together by spot welds disposed at random or unsymmetrically in respect of the diameter and a hub portion of the rotatable tool.
Claim 9
Independent Claim
74 words
A method for manufacturing a rotatable cutting tool comprising two sheet portions fastened together, comprising the steps of a. mixing into a glue an electrically conductive material which is dispersed into the glue, b. glueing together the sheets with the product of said mixing step, and c. spot welding the sheet portions together by spot welds disposed at random or unsymmetrically in respect of the diameter and a hub portion of the rotatable tool.
Claim 10
Dependent Claim
144 words
A method as claimed in claim 7 wherein said glueing and welding steps comprise: a. spreading the electrically conductive material containing glue over the whole area of the surfaces of the two sheets except along a peripheral annular area, b. providing the said annular area with a layer of a silver solder, with a melting temperature of about 600C., c. pressing the two sheets together until the glue has bound, d. securing the sheets together by spot welding at spaced points, e. fastening the cutters or bits one at a time by soldering them to the combined sheets, using a silver solder melting at a temperature higher than the melting temperature of the solder used for soldering together the sheets, f. heating the circumferential or peripheral annular area so as to make the silver solder bind the sheets together at the said annular area.
Claim 11
Dependent Claim
37 words
A method in accordance with claim 8, wherein the heating of the annular area together with the silver solder is performed by a high-frequency current apparatus, turning the saw blade on an axle fixed in the apparatus.
Claim 12
Dependent Claim
35 words
A method in accordance with claim 7, further including, after finishing the steps of interconnecting the sheets, the following additionAl steps: a. surface grinding the sheets to different thicknesses, and b. straightening the ground tool.
Claim 13
Dependent Claim
33 words
A method in accordance with claim 8 wherein the sheets have teeth around the periphery thereof and wherein the width of said annular area comprises at least the whole height of the teeth.
Claim 14
Dependent Claim
23 words
A method in accordance with claim 11 wherein said annular area is 1 - 10 mm. wider than the height of the teeth.
Claim 15
Dependent Claim
38 words
A method in accordance with claim 7 further including, prior to said mixing step, the steps of: hot pressing the two sheet portions together at about 400440C., surface grinding the sheets, straightening the sheets, and degreasing the sheets.
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) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |