US3899054A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disc brakes with cooling rods
Assignee: PepsiAmericas Inc
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Filing: 1974-02-08
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Granted: 1975-08-12
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Expires: 1994-02-08
Abstract
Abstract Disc brake structure which includes a rotor presenting two spaced walls with a plurality of rods connected to the interior surfaces thereof so that air passing from the center of the rotor between the interior surfaces of the rotor walls and outward from the rotor is constrained to follow a substantially tortuous path.
Inventors
- 👤 Howard B Huntress
- 👤 Raymond J Novotny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:52
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/02; F16D65/12; F16D65/128; F16D2065/13; F16D2065/1304; F16D2065/132; F16D2065/1328; F16D2065/134; F16D2065/1344
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
109 words
In a cast disc brake rotor for dissipating heat incidental to braking comprising a pair of spaced walls, each presenting an exterior braking surface and an opposite interior surface, and a plurality of connecting rods rigidly connecting said interior surfaces and maintaining the fixed positional relationship therebetween, the improvement comprising: a plurality of separated truncated rods cast integral with the rotor and protruding from each of the interior surfaces, said connecting rods and truncated rods being interspersed generally uniformly between the inner circumference and outer circumference of said interior surfaces and staggered relative to one another to constrain fluid passing outwardly between said walls to follow a tortuous path.
Claim 2
Dependent Claim
109 words
In a cast disc brake rotor for dissipating heat incidental to braking comprising a pair of spaced walls, each presenting an exterior braking surface and an opposite interior surface, and a plurality of connecting rods rigidly connecting said interior surfaces and maintaining the fixed positional relationship therebetween, the improvement comprising: a plurality of separated truncated rods cast integral with the rotor and protruding from each of the interior surfaces, said connecting rods and truncated rods being interspersed generally uniformly between the inner circumference and outer circumference of said interior surfaces and staggered relative to one another to constrain fluid passing outwardly between said walls to follow a tortuous path.
Claim 3
Dependent Claim
46 words
The brake rotor of claim 1 further comprising a plurality of generally radially directed vanes joining said interior surfaces and further characterized in that the connecting rods and truncated rods are irregularly spaced from said vanes, to induce turbulence in the flow of fluid passing therebetween.
Claim 4
Dependent Claim
22 words
The brake rotor of claim 2 further characterized in that at least one truncated rod is interposed between circumferentially adjacent connecting rods.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |