US4249298A
Expired / Lapsed
US
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Method for connecting two members
Assignee: Hitachi Ltd
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Filing: 1979-03-27
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Granted: 1981-02-10
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Expires: 1999-03-27
Abstract
Abstract A method for connecting two members to be connected comprises following steps. At first, a circumferential groove is formed on the connecting surfaces of the members to be connected. Secondly, axial recesses are formed on the inner surface of the groove. Thirdly, a connecting member is placed between the members to be connected. The connecting member is made of a material which has a smaller resistance against deformation than the members to be connected has and which has a required mechanical strength. Lastly, the connecting member is pressed and plastically deformed, resulting in that the connecting member flows into the groove and the recesses.
Inventors
- 👤 Hisanobu Kanamaru
- 👤 Hideo Tatsumi
- 👤 Moisei Okabe
- 👤 Akira Tohkairin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:19
CPC Classifications
B; B21; B21K; B21K25/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49925; Y10T29/49934; Y10T29/49938; Y10T29/49947; Y10T29/49954; Y10T403/00; Y10T403/49
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
165 words
A method for connecting two members to be connected by means of another connecting member comprising: (a) forming a circumferential groove on connecting surfaces of each of first and second members to be connected; (b) forming roughness on an inner surface of the circumferential groove of each of the first and second members; (c) positioning said first and second members so as to define a gap therebetween bounded on opposite sides by the connecting surfaces of the first and second members; (d) placing a connecting member in the gap between the connecting surfaces of the first and the second members to be connected, the connecting member being made of a material which has a lower resistance to plastic deformation than that of which the first and the second members to be connected are formed and has a required mechanical strength; and (e) pressing and plastically deforming the connecting member in a manner whereby the circumferential groove and the roughness are filled with the connecting member.
Claim 2
Independent Claim
165 words
A method for connecting two members to be connected by means of another connecting member comprising: (a) forming a circumferential groove on connecting surfaces of each of first and second members to be connected; (b) forming roughness on an inner surface of the circumferential groove of each of the first and second members; (c) positioning said first and second members so as to define a gap therebetween bounded on opposite sides by the connecting surfaces of the first and second members; (d) placing a connecting member in the gap between the connecting surfaces of the first and the second members to be connected, the connecting member being made of a material which has a lower resistance to plastic deformation than that of which the first and the second members to be connected are formed and has a required mechanical strength; and (e) pressing and plastically deforming the connecting member in a manner whereby the circumferential groove and the roughness are filled with the connecting member.
Claim 3
Dependent Claim
33 words
A method according to claim 1, wherein the circumferential groove is a continuous one formed on the whole circumference of the connecting surfaces of the first and the second members to be connected.
Claim 4
Dependent Claim
22 words
The method according to claim 2, wherein a plurality of the circumferential grooves are formed axially separated with respect to one another.
Claim 5
Dependent Claim
21 words
The method according to claim 1, wherein the roughness is formed by a series of alternating axially extending ridges and recesses.
Claim 6
Dependent Claim
16 words
A method according to claim 1 or 4, wherein the roughness is formed by a knurling.
Claim 7
Dependent Claim
19 words
A method according to claim 1 or 4, wherein the roughness is formed by a vibrating or oscillating bit.
Claim 8
Dependent Claim
16 words
A method according to claim 1, wherein the roughness includes recesses formed in the axial direction.
Claim 9
Dependent Claim
21 words
A method according to claim 1 or 4, wherein the mean depth of the groove is preferably 0.2 to 1.0 mm.
Claim 10
Dependent Claim
18 words
A method according to claim 7, wherein the height of the roughness is preferably 0.2 to 1.0 mm.
Claim 11
Independent Claim
30 words
A method according to claims 4 or 7, wherein said recesses are laterally bounded by wall surfaces oriented with respect to each other so as to define an angle therebetween.
Claim 12
Independent Claim
42 words
A method according to claims 1 or 9, wherein a height H 1 of said connecting member is selected so as to be not more than 0.2 to 0.3 mm larger than a height H o of said first and second members.
Claim 13
Independent Claim
25 words
A method according to claims 1 or 7, wherein said first member is annular and said second member is concentrically positioned within said first member.
Claim 14
Dependent Claim
22 words
A method according to claim 12, wherein said first member is a fly-wheel and said second member is a shaft mounting boss.
Claim 15
Dependent Claim
50 words
A method according to claim 1, wherein said step of pressing and plastically deforming is performed by an end of a die having an end surface and side surfaces adjoining said end surface, said side surfaces being inclined at an angle of 93° to 105° relative to said end surface.
Claim 16
Dependent Claim
46 words
A method according to claim 14, wherein said die is inserted into said gap in a direction perpendicular to said end surface, and wherein an upper wall of said grooves are inclined at an angle of 20° to 70° relative to the direction of die insertion.
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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) | 1984-02-10 | 1984-08-11 | 1985-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-10 | 1988-08-11 | 1989-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-10 | 1992-08-11 | 1993-02-10 | $7700.00 | Window Closed / Lapsed |