Patent US3762032A successfully refreshed from Google Patents.
US3762032A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bonding
Assignee: Motors Liquidation Co
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Filing: 1971-08-19
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Granted: 1973-10-02
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Expires: 1991-08-19
Abstract
Abstract Controlled pressure is put onto workpieces which are being bonded by diffusion bonding, or other processes involving heating the workpiece, by a fixture which develops the pressure by differential thermal expansion between inner and outer members of the fixture.
Inventors
- 👤 C Bowling
- 👤 G Meginnis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:19
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49925; Y10T29/49927; Y10T29/49938; Y10T29/4994
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
81 words
A fixture for holding and exerting force on a workpiece to be bonded in response to heating of the fixture, the fixture comprising, in combination, a ring and a plug fitted within the ring, the ring having a lower coefficient of thermal expansion than the plug so that the ring contracts relatively to the plug upon heating, the fixture being configured to receive a workpiece so as to exert a clamping force on the workpiece in response to such relative contraction.
Claim 2
Dependent Claim
81 words
A fixture for holding and exerting force on a workpiece to be bonded in response to heating of the fixture, the fixture comprising, in combination, a ring and a plug fitted within the ring, the ring having a lower coefficient of thermal expansion than the plug so that the ring contracts relatively to the plug upon heating, the fixture being configured to receive a workpiece so as to exert a clamping force on the workpiece in response to such relative contraction.
Claim 3
Dependent Claim
76 words
A fixture for exerting radial compressive force on an annular workpiece to be bonded in response to heating of the fixture comprising, in combination, a plug configured to fit the interior of the workpiece and a ring configured to fit the exterior of the workpiece, the plug having a higher coefficient of thermal expansion than the ring so that the workpiece is radially compressed by differential expansion of the plug and ring upon heating the fixture.
Claim 4
Dependent Claim
76 words
A fixture for exerting radial compressive force on an annular workpiece to be bonded in response to heating of the fixture comprising, in combination, a plug configured to fit the interior of the workpiece and a ring configured to fit the exterior of the workpiece, the plug having a higher coefficient of thermal expansion than the ring so that the workpiece is radially compressed by differential expansion of the plug and ring upon heating the fixture.
Claim 5
Dependent Claim
97 words
A fixture for exerting radial compressive force on an annular Workpiece to be bonded in response to heating of the fixture comprising, in combination, a plug component configured to fit the interior of the workpiece and a ring component configured to fit the exterior of the workpiece, one of the said components having a coefficient of thermal expansion substantially equal to that of the workpiece and the plug component having a higher coefficient of thermal expansion than the ring component so that the workpiece is radially compressed by differential expansion of the components upon heating the fixture.
Claim 6
Dependent Claim
97 words
A fixture for exerting radial compressive force on an annular Workpiece to be bonded in response to heating of the fixture comprising, in combination, a plug component configured to fit the interior of the workpiece and a ring component configured to fit the exterior of the workpiece, one of the said components having a coefficient of thermal expansion substantially equal to that of the workpiece and the plug component having a higher coefficient of thermal expansion than the ring component so that the workpiece is radially compressed by differential expansion of the components upon heating the fixture.
Claim 7
Dependent Claim
87 words
A fixture for holding and exerting force on a workpiece to be bonded in response to heating of the fixture, the fixture comprising, in combination, a ring and a plug fitted within the ring, the ring having a lower coefficient of thermal expansion than the plug so that the ring contracts relatively to the plug upon heating, the plug defining jaws configured to receive the workpiece and contract to clamp the workpiece between the jaws in response to the relative contraction of the ring and the plug.
Claim 8
Dependent Claim
87 words
A fixture for holding and exerting force on a workpiece to be bonded in response to heating of the fixture, the fixture comprising, in combination, a ring and a plug fitted within the ring, the ring having a lower coefficient of thermal expansion than the plug so that the ring contracts relatively to the plug upon heating, the plug defining jaws configured to receive the workpiece and contract to clamp the workpiece between the jaws in response to the relative contraction of the ring and the plug.
Claim 9
Dependent Claim
93 words
A fixture for holding and exerting force on a workpiece to be bonded in response to heating of the fixture, the fixture comprising, in combination, a ring and a plug fitted within the ring, the ring having a lower coefficient of thermal expansion than the plug so that the ring contracts relatively to the plug upon heating, the plug having walls defining a slot configured to receive the workpiece and contract to clamp the workpiece between the walls of the slot in response to the relative contraction of the ring and the plug.
Claim 10
Dependent Claim
93 words
A fixture for holding and exerting force on a workpiece to be bonded in response to heating of the fixture, the fixture comprising, in combination, a ring and a plug fitted within the ring, the ring having a lower coefficient of thermal expansion than the plug so that the ring contracts relatively to the plug upon heating, the plug having walls defining a slot configured to receive the workpiece and contract to clamp the workpiece between the walls of the slot in response to the relative contraction of the ring and the plug.
Claim 11
Dependent Claim
90 words
A fixture for holding and exerting force on a workpiece to be bonded in response to heating of the fixture, the fixture comprising, in combination, a ring and a plug fitted within the ring, the ring having a lower coefficient of thermal expansion than the plug so that the ring contracts relatively to the plug upon heating, the plug comprising at least two separate blocks comfigured to receive the workpiece between the blocks and to impinge the workpiece in response to the relative contraction of the ring and the plug.
Claim 12
Dependent Claim
90 words
A fixture for holding and exerting force on a workpiece to be bonded in response to heating of the fixture, the fixture comprising, in combination, a ring and a plug fitted within the ring, the ring having a lower coefficient of thermal expansion than the plug so that the ring contracts relatively to the plug upon heating, the plug comprising at least two separate blocks comfigured to receive the workpiece between the blocks and to impinge the workpiece in response to the relative contraction of the ring and the plug.
Claim 13
Independent Claim
70 words
A method of exerting pressure on a workpiece having at least two abutting parts to be bonded together by the application of heat and pressure to the parts comprising mounting the workpiece at a relatively low temperature in a fixture and then heating the workpiece and fixture, characterized by the utilization of differential thermal expansion of parts of the fixture during the heating to apply the pressure to the workpiece.
Claim 14
Independent Claim
70 words
A method of exerting pressure on a workpiece having at least two abutting parts to be bonded together by the application of heat and pressure to the parts comprising mounting the workpiece at a relatively low temperature in a fixture and then heating the workpiece and fixture, characterized by the utilization of differential thermal expansion of parts of the fixture during the heating to apply the pressure to the workpiece.
Claim 15
Independent Claim
96 words
A method of exerting pressure on an annular laminated workpiece having at least two abutting layers to be bonded together by the application of heat and pressure to the parts, comprising mounting the workpiece at a relatively low temperature on a mandrel having substantially the same coefficient of thermal expansion as the workpiece, inserting the workpiece and mandrel into a ring having a lower coefficient of thermal expansion than the mandrel, and then heating the workpiece, mandrel, and ring to employ differential thermal expansion of the mandrel and ring to apply the pressure to the workpiece.
Claim 16
Independent Claim
96 words
A method of exerting pressure on an annular laminated workpiece having at least two abutting layers to be bonded together by the application of heat and pressure to the parts, comprising mounting the workpiece at a relatively low temperature on a mandrel having substantially the same coefficient of thermal expansion as the workpiece, inserting the workpiece and mandrel into a ring having a lower coefficient of thermal expansion than the mandrel, and then heating the workpiece, mandrel, and ring to employ differential thermal expansion of the mandrel and ring to apply the pressure to the workpiece.
Claim 17
Dependent Claim
23 words
A method as recited in claim 8 in which the workpiece is mounted on the mandrel by winding a strip onto the mandrel.
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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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |