Patent US4448291A successfully refreshed from Google Patents.
US4448291A
Expired / Lapsed
US
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Rotor for a disc brake assembly
Assignee: Bendix Corp
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Filing: 1981-12-21
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Granted: 1984-05-15
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Expires: 2001-12-21
Abstract
Abstract A rotor for a disc brake assembly includes at least two members (40, 42) opposing a pair of friction elements (16, 18). The members are stamped to form projections (46) in abutment with each other to join the members together. The projections (46) also space the members from each other to form a clearance (58) and a connecting portion (44) cooperates with some of the projections (46) to prevent rotation between the connecting portion (44) and the two members (40, 42).
Inventors
- 👤 Irving R. Ritsema
- 👤 Donald D. Johannesen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:37
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/02; F16D65/12; F16D65/128; F16D2065/13; F16D2065/1304; F16D2065/1316; F16D2065/1328; F16D2065/134; F16D2065/1344; F16D69/00; F16D2069/004
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
166 words
A rotor for a disc brake assembly having a pair of friction elements engageable with the rotor to retard rotation thereof, the rotor comprising at least a pair of stamped members with radially extending surfaces engageable with a pair of friction elements, the pair of stamped members cooperating to define a clearance therebetween permitting air flow through the rotor to readily convey thermal energy to an environment for the disc brake during braking, characterized in that each of said pair of stamped members includes a plurality of integrally formed projections extending axially toward opposing integrally formed projections of the other stamped member, the integral projections of a respective stamped member aligned with a plurality of depressions in a surface engageable with an associated friction element, said projections for securing together the pair of stamped members and cooperating to define said clearance and reduce axial deflection of said pair of stamped members into said clearance during braking over the radial dimension for said pair of stamped members.
Claim 2
Dependent Claim
166 words
A rotor for a disc brake assembly having a pair of friction elements engageable with the rotor to retard rotation thereof, the rotor comprising at least a pair of stamped members with radially extending surfaces engageable with a pair of friction elements, the pair of stamped members cooperating to define a clearance therebetween permitting air flow through the rotor to readily convey thermal energy to an environment for the disc brake during braking, characterized in that each of said pair of stamped members includes a plurality of integrally formed projections extending axially toward opposing integrally formed projections of the other stamped member, the integral projections of a respective stamped member aligned with a plurality of depressions in a surface engageable with an associated friction element, said projections for securing together the pair of stamped members and cooperating to define said clearance and reduce axial deflection of said pair of stamped members into said clearance during braking over the radial dimension for said pair of stamped members.
Claim 3
Dependent Claim
53 words
The rotor in accordance with claim 1, further comprising a connecting portion extending between said pair of stamped members and a wheel assembly associated with said disc brake assembly, said connecting portion defining abutment means cooperating with selected integral projections to prevent rotation between said pair of stamped members and said connecting portion.
Claim 4
Dependent Claim
22 words
The rotor in accordance with claim 2, in which said abutment means comprises a plurality of recesses for receiving radially inner projections.
Claim 5
Dependent Claim
131 words
A rotor for a disc brake assembly which includes a pair of friction elements that cooperate with a wheel assembly to retard rotation of the latter during braking, the rotor including a pair of stamped members with surfaces each designed for engagement with a respective friction element, each member having a plurality of integral projections extending axially toward projections of the other member and for securing the members together, the projections of each member being aligned with associated depressions in the surface engageable with an associated friction element, and a connecting portion extending between the pair of stamped members and the wheel assembly, said connecting portion being disposed between said pair of stamped members and cooperating with the stamped members to define a clearance therebetween permitting air flow through the rotor.
Claim 6
Dependent Claim
131 words
A rotor for a disc brake assembly which includes a pair of friction elements that cooperate with a wheel assembly to retard rotation of the latter during braking, the rotor including a pair of stamped members with surfaces each designed for engagement with a respective friction element, each member having a plurality of integral projections extending axially toward projections of the other member and for securing the members together, the projections of each member being aligned with associated depressions in the surface engageable with an associated friction element, and a connecting portion extending between the pair of stamped members and the wheel assembly, said connecting portion being disposed between said pair of stamped members and cooperating with the stamped members to define a clearance therebetween permitting air flow through the rotor.
Claim 7
Dependent Claim
33 words
The rotor in accordance with claim 4, further comprising openings disposed in said connecting portion and receiving selected projections in order to prevent movement of said stamped members relative to said connecting portion.
Claim 8
Dependent Claim
131 words
A rotor for a disc brake assembly which includes a pair of friction elements that cooperate with a wheel assembly to retard rotation of the latter during braking, the rotor includng a pair of members with surfaces each designed for engagement with a respective friction element, and a connecting portion extending between the pair of stamped members and the wheel assembly, said connecting portion having a plurality of integral projections extending from respective sides of said connecting portion and engaging an associated member, said projections being secured to and supporting said associated member and each projection aligned with an associated depression in an opposite surface of said connecting portion, the connecting portion cooperating with each of said pair of members to define a clearance therewith permitting air flow through the rotor.
Claim 9
Dependent Claim
131 words
A rotor for a disc brake assembly which includes a pair of friction elements that cooperate with a wheel assembly to retard rotation of the latter during braking, the rotor includng a pair of members with surfaces each designed for engagement with a respective friction element, and a connecting portion extending between the pair of stamped members and the wheel assembly, said connecting portion having a plurality of integral projections extending from respective sides of said connecting portion and engaging an associated member, said projections being secured to and supporting said associated member and each projection aligned with an associated depression in an opposite surface of said connecting portion, the connecting portion cooperating with each of said pair of members to define a clearance therewith permitting air flow through the rotor.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-15 | 1987-11-14 | 1988-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-15 | 1991-11-14 | 1992-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-15 | 1995-11-14 | 1996-05-15 | $7700.00 | Window Closed / Lapsed |