Patent US2990531A successfully refreshed from Google Patents.
Patent US3856367A successfully refreshed from Google Patents.
US3856367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spiral-grooved bearing and method of manufacture
Assignee: Dornier System GmbH
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Filing: 1973-02-16
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Granted: 1974-12-24
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Expires: 1993-02-16
Abstract
Abstract A hydrodynamically-acting sliding bearing including a shaft having a central conical bore formed in its end and a roller bearing ball affixed in the bore, the bore being dimensioned with respect to the ball such that a gap is formed between the edge of the shaft and the line of contact of the bore with the ball, a bond, such as with solder or adhesive or by an electron beam welding, is formed in the gap to affix the ball to the shaft, a supporting member of a hardenable alloy operatively cooperates with the shaft and ball and has an imprint of a spherical segment formed in an initially plane surface by punching another roller bearing ball into the plane surface prior to hardening, the supporting member is surface hardened by air contact, at least in the area of the imprint of the spherical segment, and the ball on the shaft is so dimensioned with respect to the imprint in the supporting member that a small gap exists between this ball and the imprinted segment. In the punching of the supporting member, the supporting member is placed in a countersink of a die, the die is further countersunk to receive an annular elastic ring which fits about the periphery of the supporting member, adjacent the surface to be punched, to accommodate material displaced during punching and a bore is also formed in the die on the side opposite the surface to be punched to accommodate material displaced by the punching.
Inventors
- 👤 M Granzow
- 👤 H Wohnhaas
- 👤 K Haas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:02
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/06; F16C33/10; F16C33/1025; F16C33/106; F16C33/107; B; B04; B04B; B04B9/00; B04B9/12; F16C17/00; F16C17/04; F16C17/08; F16C17/10; F16C17/102; F16C17/105; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49641
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
115 words
A hydrodynamically-acting sliding bearing; comprising, a shaft having a roller bearing ball affixed to the end thereof, and a supporting member of a hardenable alloy adapted to operatively cooperate with said end of said shaft and having an imprint of a spherical segment formed in an initially plane surface by punching a roller bearing ball into said plane surface prior to the hardening of said hardenable alloy, said roller bearing ball affixed to the end of said shaft having dimensions of the same order of magnitude but slightly smaller than the dimensions of said imprint of said spherical segment to form a gap between said roller bearing ball and said imprint of said spherical segment.
Claim 2
Dependent Claim
115 words
A hydrodynamically-acting sliding bearing; comprising, a shaft having a roller bearing ball affixed to the end thereof, and a supporting member of a hardenable alloy adapted to operatively cooperate with said end of said shaft and having an imprint of a spherical segment formed in an initially plane surface by punching a roller bearing ball into said plane surface prior to the hardening of said hardenable alloy, said roller bearing ball affixed to the end of said shaft having dimensions of the same order of magnitude but slightly smaller than the dimensions of said imprint of said spherical segment to form a gap between said roller bearing ball and said imprint of said spherical segment.
Claim 3
Dependent Claim
56 words
A bearing in accordance with claim 1 wherein the shaft has formed therein a conical centering bore having dimensions such that said bore will receive the roller bearing ball and forms a gap between the shaft edge, projecting beyond the line of contact between said bore and said roller bearing ball, and said roller bearing ball.
Claim 4
Dependent Claim
35 words
A bearing in accordance with claim 2 wherein the gap formed between the projecting shaft edge and the roller bearing ball contains a bonding material for affixing said roller bearing ball to said shaft end.
Claim 5
Dependent Claim
13 words
A bearing in accordance with claim 3 wherein the bonding material is solder.
Claim 6
Dependent Claim
14 words
A bearing in accordance with claim 3 wherein the bonding material is an adhesive.
Claim 7
Dependent Claim
32 words
A bearing in accordance with claim 2 wherein the roller bearing ball is electron beam welded to the shaft end in the gap between the shaft edge and said roller bearing ball.
Claim 8
Dependent Claim
20 words
A bearing in accordance with claim 1 wherein the roller bearing ball has spiral grooves formed in the surface thereof.
Claim 9
Dependent Claim
16 words
A bearing in accordance with claim 1 wherein the supporting member has an axially symmetrical shape.
Claim 10
Dependent Claim
19 words
A bearing in accordance with claim 8 wherein the supporting member has an annular waisting formed about its periphery.
Claim 11
Dependent Claim
57 words
A bearing in accordance with claim 9 wherein the upper wall of the annular waisting, nearest the imprint of the spherical segment, extends diagonally toward the central axis of the supporting members and the wall of said annular waisting furtherest from said imprint of said spherical segment, extends perpendicularly toward said central axis of said supporting member.
Claim 12
Dependent Claim
30 words
A bearing in accordance with claim 1 wherein the supporting member has a hard oxide layer formed thereon, at least in the area of the imprint of the spherical segment.
Claim 13
Dependent Claim
18 words
A bearing in accordance with claim 11 wherein the hard oxide layer is formed by air contact therewith.
Claim 14
Dependent Claim
40 words
A bearing in accordance with claim 1 wherein a holding means is affixed to the supporting member and has a central bore therein to receive the shaft end and an abrasion-proof surface formed on the wall of said central bore.
Claim 15
Independent Claim
84 words
A method of forming a supporting member adapted to operatively cooperate with the end of a shaft having a roller bearing ball affixed thereto, in a hydrodynamically-acting sliding bearing; comprising, forming said supporting member of a hardenable alloy and having a plane surface, punching a roller bearing ball into said plane surface to form a spherical imprint of said roller bearing ball and thereafter hardening said supporting member, at least that portion of said supporting member having said imprint of said roller bearing ball.
Claim 16
Independent Claim
84 words
A method of forming a supporting member adapted to operatively cooperate with the end of a shaft having a roller bearing ball affixed thereto, in a hydrodynamically-acting sliding bearing; comprising, forming said supporting member of a hardenable alloy and having a plane surface, punching a roller bearing ball into said plane surface to form a spherical imprint of said roller bearing ball and thereafter hardening said supporting member, at least that portion of said supporting member having said imprint of said roller bearing ball.
Claim 17
Dependent Claim
16 words
A method in accordance with claim 14 wherein the supporting member has an axially symmetrical shape.
Claim 18
Dependent Claim
19 words
A method in accordance with claim 15 wherein the supporting member has an annular waisting formed about its periphery.
Claim 19
Dependent Claim
51 words
A method in accordance with claim 16 wherein the upper wall of the annular waisting, nearest the spherical imprint, extending diagonally toward the central axis of the supporting member and the wall of said annular waisting furtherest from said spherical imprint, extends perpendicularly toward said central axis of said supporting member.
Claim 20
Dependent Claim
30 words
A method in accordance with claim 14 wherein a hard oxide layer is formed on the surface of the supporting member, at least in the area of the spherical imprint.
Claim 21
Dependent Claim
18 words
A method in accordance with claim 18 wherein the hard oxide layer is formed by air contact therewith.
Claim 22
Dependent Claim
20 words
A method in accordance with claim 14 Wherein the supporting member is positioned in a die during the punching thereof.
Claim 23
Dependent Claim
17 words
A method in accordance with claim 20 wherein the die is countersunk to receive the supporting member.
Claim 24
Dependent Claim
44 words
A method in accordance with claim 21 wherein the die is additionally countersunk and an annular elastic ring is positioned in said countersink and about the periphery of the supporting member, adjacent the plane surface, to accommodate the material displaced during the punching operation.
Claim 25
Dependent Claim
37 words
A method in accordance with claim 20 wherein the die has a central bore therein, on the side of the supporting member opposite the side being punched, adapted to accommodate the material displaced during the punching operation.
Claim 26
Dependent Claim
44 words
A method in accordance with claim 23 wherein the die is additionally countersunk and an annular elastic ring is positioned in said countersink and about the periphery of the supporting member, adjacent the plane surface, to accommodate the material displaced during the punching operation.
References Cited (Backward Citations)
US1208526A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |