US3708846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for fastening the blades of a rotor for hydrodynamic units
Assignee: Daimler Benz AG
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Filing: 1970-05-07
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Granted: 1973-01-09
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Expires: 1990-05-07
Abstract
Abstract A method for fixing the blades of a rotor for a hydrodynamic unit in which the blades are assembled and preliminarily held in position within the shell of the rotor and wires made of soldering or brazing material and bent into the shape of rings are placed on the blades at their places of abutment at the shell housing; after the assembly of the parts as described, the rotor unit is heated above the melting point of the soldering or brazing material and thereafter cooled whereby the soldering or brazing material flows by gravity into the gaps between the blades and the shell.
Inventors
- 👤 O Worner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:01
CPC Classifications
B; B23; B23K; B23K1/00; B23K1/20; F; F16; F16H; F16H41/00; F16H41/24; F16H41/28; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/4933
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
153 words
A method for soldering or brazing blades of a rotor for a hydrodynamic unit, characterized by the steps of fixing the blades in a predetermined position within an annular blade housing to form a ring of radially extending blades in which the inner and outer radial extent of the blades are placed immediately adjacent corresponding inner and outer portions of the annular blade housing, placing two wires made from soldering or brazing material and which are bent into annular shapes having diameters corresponding to the inner and outer radial extent of the blades on the ends of the blades, thereafter heating the thus-assembled unit to a higher temperature than the melting temperature of the soldering or brazing material such that the material flows downwardly by gravity along the blade periphery into the gaps between the blade and the housing for joining the blades to the housing, and finally cooling the previously heated unit.
Claim 2
Independent Claim
153 words
A method for soldering or brazing blades of a rotor for a hydrodynamic unit, characterized by the steps of fixing the blades in a predetermined position within an annular blade housing to form a ring of radially extending blades in which the inner and outer radial extent of the blades are placed immediately adjacent corresponding inner and outer portions of the annular blade housing, placing two wires made from soldering or brazing material and which are bent into annular shapes having diameters corresponding to the inner and outer radial extent of the blades on the ends of the blades, thereafter heating the thus-assembled unit to a higher temperature than the melting temperature of the soldering or brazing material such that the material flows downwardly by gravity along the blade periphery into the gaps between the blade and the housing for joining the blades to the housing, and finally cooling the previously heated unit.
Claim 3
Dependent Claim
18 words
A method according to claim 1, characterized in that the heating takes place in a protective gas atmosphere.
Claim 4
Dependent Claim
94 words
A method according to claim 1, for hydrodynamic units such as torque converters, couplings and brakes having an annular dish inserted into corresponding indentations in the blades, characterized in that additionally two wires made from soldering or brazing material and bent into the shape of rings are placed on the blades at the joint places between the blades and the annular dish such that upon heating of the unit the material flows downwardly by gravity along the blade into the gaps between the blades and the dish for joining the blades to the dish.
Claim 5
Dependent Claim
18 words
A method according to claim 3, characterized in that the heating takes place in a protective gas atmosphere.
References Cited (Backward Citations)
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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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |