US3856635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formation of the rotor track of a rotary engine
Assignee: ENHANCED TECHNOLOGY ASSOCIATES Inc A CORP OF NY
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Filing: 1972-12-18
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Granted: 1974-12-24
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Expires: 1992-12-18
Abstract
Abstract This invention relates to a method of electroforming the epitrochoidal track for the rotor of the Wankel internal combustion engine. The method involves the deposition of a sequence of plates on a mandrel of epitrochoidal shape and casting the aluminum alloy housing onto the final plate. The sequence of plates essentially involves, (1) a first plate with poor adhesion to the mandrel, (2) a wear-resistant plate and (3) a final plate to aid in securing good adhesion of the aluminum alloy housing cast thereon. These are the main steps. Intermediate steps may also be involved such as using two thin plates in step (1) to obtain poor adhesion.
Inventors
- 👤 H Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:27
CPC Classifications
F; F02; F02B; F02B55/00; F02B55/08; C; C25; C25D; C25D1/00; F02B1/00; F02B1/02; F02B1/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49231; Y10T29/49234; Y10T29/4998; Y10T29/49982; Y10T29/49984
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
24 words
A METHOD FOR FORMING A HOUSING COMPRISED OF ALUMINUM FOR THE ROTOR TRACK OF A ROTARY INTERNAL COMBUSTION ENGINE, WHICH COMPRISES THE STEPS OF:
Claim 2
Independent Claim
24 words
A METHOD FOR FORMING A HOUSING COMPRISED OF ALUMINUM FOR THE ROTOR TRACK OF A ROTARY INTERNAL COMBUSTION ENGINE, WHICH COMPRISES THE STEPS OF:
Claim 3
Dependent Claim
38 words
ELECTRODEPOSITING A FIRST LAYER ON TO A MANDREL OF THE SHAPE OF THE TRACK OF THE ROTOR, SAID FIRST BEING SEPARABLE FROM THE MANDREL DURING SUBSEQUENT STEPS; 2. ELECTRODEPOSITING A WEAR RESISTANT LAYER ON TO SAID FIRST LAYER;
Claim 4
Dependent Claim
38 words
ELECTRODEPOSITING A FIRST LAYER ON TO A MANDREL OF THE SHAPE OF THE TRACK OF THE ROTOR, SAID FIRST BEING SEPARABLE FROM THE MANDREL DURING SUBSEQUENT STEPS; 2. ELECTRODEPOSITING A WEAR RESISTANT LAYER ON TO SAID FIRST LAYER;
Claim 5
Dependent Claim
18 words
A method according to claim 1, wherein Step 4 is a thin nickel plate instead of the copper.
Claim 6
Dependent Claim
29 words
A method according to claim 1, wherein Step 3 is a wear resistant plate comprised of nickel containing about 2 to about 4 weight percent of silicon carbide particles.
Claim 7
Dependent Claim
25 words
forming on to the wear resistant layer a metallic layer useful for improving adhesion of the aluminum casting to the previously formed wear resistant layer;
Claim 8
Dependent Claim
25 words
forming on to the wear resistant layer a metallic layer useful for improving adhesion of the aluminum casting to the previously formed wear resistant layer;
Claim 9
Dependent Claim
25 words
FORMING ON TO THE WEAR RESISTANT LAYER A METALLIC LAYER USEFUL FOR IMPROVING ADHESION OF THE ALUMINUM CASTING TO THE PREVIOUSLY FORMED WEAR RESISTANT LAYER;
Claim 10
Dependent Claim
25 words
FORMING ON TO THE WEAR RESISTANT LAYER A METALLIC LAYER USEFUL FOR IMPROVING ADHESION OF THE ALUMINUM CASTING TO THE PREVIOUSLY FORMED WEAR RESISTANT LAYER;
Claim 11
Dependent Claim
57 words
ELECTRODEPOSITING ZINC ON TO THE MANDREL, ELECTRODEPOSITING COPPER ON TO THE ZINC DEPOSIT, ELECTRODEPOSITING A PLATE COMPRISED OF IRON OF A THICKNESS OF ABOUT 1 TO ABOUT 10 MILS CONTAINING ABOUT 2 TO ABOUT 8 WEIGHT PERCENT FINE SILICON CARBIDE PARTICLES, AND ELECTRODEPOSITION A ZINC DEPOSIT OF A THICKNESS OF ABOUT 0.1 MIL TO ABOUT 2 MILS;
Claim 12
Dependent Claim
57 words
ELECTRODEPOSITING ZINC ON TO THE MANDREL, ELECTRODEPOSITING COPPER ON TO THE ZINC DEPOSIT, ELECTRODEPOSITING A PLATE COMPRISED OF IRON OF A THICKNESS OF ABOUT 1 TO ABOUT 10 MILS CONTAINING ABOUT 2 TO ABOUT 8 WEIGHT PERCENT FINE SILICON CARBIDE PARTICLES, AND ELECTRODEPOSITION A ZINC DEPOSIT OF A THICKNESS OF ABOUT 0.1 MIL TO ABOUT 2 MILS;
Claim 13
Dependent Claim
57 words
electrodepositing zinc on to the mandrel, electrodepositing copper on to the zinc deposit, electrodepositing a plate comprised of iron of a thickness of about 1 to about 10 mils containing about 2 to about 8 weight percent fine silicon carbide particles, and electrodepositing a zinc deposit of a thickness of about 0.1 mil to about 2 mils;
Claim 14
Dependent Claim
57 words
electrodepositing zinc on to the mandrel, electrodepositing copper on to the zinc deposit, electrodepositing a plate comprised of iron of a thickness of about 1 to about 10 mils containing about 2 to about 8 weight percent fine silicon carbide particles, and electrodepositing a zinc deposit of a thickness of about 0.1 mil to about 2 mils;
Claim 15
Dependent Claim
29 words
A method according to claim 1, wherein Step 3 is a wear resistant plate comprised of cobalt containing about 2 to about 4 weight percent of silicon carbide particles.
Claim 16
Dependent Claim
28 words
A method according to claim 1, wherein the wear resistant plate of Step 3 is an electrodeposited plate of about 1 to about 4 mils thickness of chromium.
Claim 17
Dependent Claim
8 words
THEN CASTING A HOUSING COMPRISED OF ALUMINUM; AND
Claim 18
Dependent Claim
8 words
THEN CASTING A HOUSING COMPRISED OF ALUMINUM; AND
Claim 19
Dependent Claim
8 words
then casting a housing comprised of aluminum; and
Claim 20
Dependent Claim
8 words
then casting a housing comprised of aluminum; and
Claim 21
Dependent Claim
6 words
SEPARATING THE HOUSING FROM THE MANDREL.
Claim 22
Dependent Claim
6 words
SEPARATING THE HOUSING FROM THE MANDREL.
Claim 23
Dependent Claim
6 words
separating the housing from the mandrel.
Claim 24
Dependent Claim
6 words
separating the housing from the mandrel.
Claim 25
Dependent Claim
14 words
A method according to claim 3, further comprising electrodepositing copper on the nickel plate.
Claim 26
Dependent Claim
28 words
A method according to claim 5, wherein the chromium plate is followed by electrodepositing a plate of about 2 to about 10 mils in thickness comprised of nickel.
Claim 27
Dependent Claim
28 words
A method according to claim 5, wherein the chromium plate is followed by electrodepositing a plate of about 1 to about 6 mils in thickness comprised of cobalt.
Claim 28
Dependent Claim
27 words
A method according to claim 5, wherein the chromium plate is followed by electrodepositing a plate of about 2 to about 10 mils thickness comprised of iron.
References Cited (Backward Citations)
US3155313A
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 |