US3816112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating steel plates with sintered friction layers
Assignee: DURIA WERK KEMPF K KG DT
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Filing: 1971-11-05
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Granted: 1974-06-11
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Expires: 1991-11-05
Abstract
Abstract Method of coating a steel plate having upper and lower surfaces with layers of sintered friction material on both surfaces. The method comprises the following steps: A. ADHERING A LAYER HAVING A ROUGH, INTERMESHING SURFACE ON ONE OF SAID UPPER AND LOWER SURFACES; B. PLACING THE STEEL PLATE WITH SAID LAYER POINTING DOWNWARDLY ONTO A MOLD HAVING A MOLD CAVITY FILLED WITH PARTICLES OF FRICTION MATERIAL SO THAT SAID LAYER CONTACTS THE UPPERMOST OF SAID PARTICLES; C. APPLYING, IN LOOSE FORMATION, A LAYER OF PARTICLES OF FRICTION MATERIAL ON THE OTHER ONE OF SAID SURFACES; D. JOINTLY SINTERING SAID PARTICLES OF FRICTION MATERIAL WITHIN SAID MOLD CAVITY AND ON SAID OTHER ONE OF SAID SURFACES TO FORM FIRST AND SECOND COATINGS OF SINTERED MATERIAL ON SAID SURFACES; E. REMOVING SAID MOLD; AND F. JOINTLY COMPRESSING SAID FIRST AND SECOND COATINGS TO A DESIRED THICKNESS.
Inventors
- 👤 F Heck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:30
CPC Classifications
B; B22; B22F; B22F7/00; B22F7/02; B22F7/04; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/1209
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
24 words
A method as claimed in claim 1, wherein said steel plate has inner and/or outer gear rims which are not coated with friction material.
Claim 2
Dependent Claim
44 words
A method as claimed in claim 1, wherein said layer having a rough intermeshing surface is formed by first applying a liquid film or fluxing agent onto said one of said first and second surfaces where after metal powder is sprinkled onto said film.
Claim 3
Dependent Claim
23 words
A method as claimed in claim 3, wherein said fluxing agents are borax and/or fluoro borate while said metal powder is bronze powder.
Claim 4
Dependent Claim
19 words
A method as claimed in claim 1, wherein said first and second coatings are subsequently post sintered and calibrated.
Claim 5
Dependent Claim
55 words
A method as claimed in claim 1, wherein said particles of friction material are contained in said mold cavity in loose formation and project beyond the upper plane of the mold cavity to an extent corresponding to about 0.2 times the height of the mold cavity, before said steel plate is placed on the mold.
Claim 6
Dependent Claim
32 words
A method as claimed in claim 1, wherein the height of the powder in said mold cavity is about two to three times as much as the ultimate thickness of the coating.
Claim 7
Independent Claim
166 words
A method for producing steel plates having inner and/or outer gear rims, said steel plates being coated on both sides with sintered friction layers, which comprises a. adhering a solid layer of rough surface configuration to at least that face of the plate which points downwardly; b. providing a mold having a mold cavity with an areal extension corresponding to the surface to be coated and filling the mold cavity in uniform manner with an amount of metallic friction particles, said particles extending beyond the upper plane of the mold cavity; c. placing the steel plate onto said mold and thus said particles with the rough layer contacting the particles extending beyond said plane; d. applying a uniform layer of metallic friction particles onto the opposite surface of said plate while covering said outer and/or inner gear rims; e. jointly sintering the metal particles in said mold cavity and on said opposite surface of said plate; f. removing said mold and jointly compressing the sintered particles.
Claim 8
Independent Claim
79 words
A method of coating a steel plate with a sintered friction layer which comprises a. adhering a layer having a rough, intermeshing surface to one surface of said steel plate; b. placing the steel plate with the adhering intermeshing layer facing downwardly onto a mold cavity, said mold cavity being filled with particles of friction material; c. sintering said friction material onto said layer and said steel plate; d. removing the mold; and e. compressing the coating thus obtained.
Claim 9
Dependent Claim
37 words
A method as claimed in claim 9, wherein a layer of friction particles is applied to the opposite surface of said steel plate, said last mentioned layer and said particles in said mold cavity being sintered simultaneously.
Claim 10
Dependent Claim
66 words
A method as claimed in claim 9, wherein a plurality of steel plates having rough intermeshing layers adhered to one of their surfaces are placed in superimposed formation on molds having mold cavities filled with friction particles to form a stack in which the top surface of the respective steel plates supports the mold of the next higher plate, said stack of mold-plates being jointly sintered.
Claim 11
Independent Claim
59 words
A method for coating the top side of a steel plate with a sintered friction layer which comprises pouring friction particles into the mold cavity of a mold in loose formation, placing the top side of a steel plate, while facing downwardly, onto said mold cavity, turning the plate with the mold by 180* and sintering said friction particles.
Claim 12
Dependent Claim
19 words
A method as claimed in claim 12, wherein said mold is removed, prIor to sintering, in an upward direction.
Claim 13
Dependent Claim
38 words
A method as claimed in claim 12, wherein the particles in the mold cavity, prior to sintering, are compacted to a thickness which is about 0.8 the height of the particles when originally poured into the mold cavity.
References Cited (Backward Citations)
US2161597A
Cited
US2178527A
Cited
US2260247A
Cited
US2381941A
Cited
US3037860A
Cited
US2945291A
Cited
US3139671A
Cited
US3684498A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |