Rotational control apparatus
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United States of America Patent
Stats
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Mar 18, 1986
Grant Date -
N/A
app pub date -
Jul 12, 1984
filing date -
Jul 12, 1984
priority date (Note) -
Expired
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Abstract
A rotational control apparatus is shown according to the teachings of the present invention in its most preferred form as a brake. In the preferred embodiment, the apparatus includes an improved drive disc having an improved ventilated hub and an improved, ventilated friction disc slideably mounted thereon. The hub includes a generally cylindrical portion having axially extending cooling air bores extending therethrough and axially extending fins extending from the opposite axial ends thereof. The friction disc includes first and second, identical, interchangeable component discs interconnected together by columns projecting from the inner surface of the component discs which abut together and form radially extending fins having circumferentially aligned air passageways formed therein. Thus, air can flow through the air entry ports formed adjacent the center of the component discs radially between the component discs and also circumferentially through the air passageways allowing a mixing and turbulence of cooling air increasing friction disc heat transfer and cooling. In the preferred embodiment, the apparatus further includes a plurality of circumferentially spaced fins which interconnect the piston and the friction lining pressure plate and also aid in cooling. The axially extending fins of the hub direct and force air through the hub cooling air bores and between the pressure plate and piston to allow increased apparatus heat transfer and cooling.
First Claim
Family
- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- NEXEN GROUP, INC.
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Dayen, Leonid | Blaine, MN | 15 | 240 |
Raines, Charles D | Plymouth, MN | 18 | 308 |
Schilling, Hugh K | St. Paul, MN | 8 | 136 |
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Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
---|---|---|---|
Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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