US3763977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake with torque limiting coupling
Assignee: Dana Inc
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Filing: 1972-09-13
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Granted: 1973-10-09
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Expires: 1992-09-13
Abstract
Abstract A clutch brake assembly is provided for use with heavy-duty nonsynchronized transmission having a limited torque feature incorporated therein. This feature is accomplished by resilient means in the form of a pair of pre-loaded Belleville washers located intermediate an outer friction section and an inner brake section. The inner brake section has tangs for drivingly engaging splines of keyways on the transmission driven shaft and also has a lost motion coupling connection with the Belleville washers. The Belleville washers in turn have a controlled frictional driving engagement with the outer friction section. With this arrangement, the Belleville washers function to positively control the torque applied to the inner brake section so that the tang and spline connection between the inner brake member and the transmission driven shaft is protected from damage by allowing the inner brake section to slip relative to the outer friction section when excessive braking pressure is applied to the outer friction section of the clutch brake by a vehicle operator.
Inventors
- 👤 W Sink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:10
CPC Classifications
F; F16; F16D; F16D67/00; F16D67/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
179 words
A clutch brake assembly for cooperating with a rotatable driven shaft and a stationary housing comprising, a. an inner brake section drivingly connected to the rotatable driven shaft for rotation therewith; b. an outer friction section movable into engagement with the stationary housing; c. an actuating means movable into engagement with the outer friction section for applying a load to the outer friction section to engage the same with the stationary housing for retarding rotation of the outer friction section; d. a resilient means positively connected to the inner brake section for transmitting rotation from the inner brake section to the resilient means and frictionally connected to the outer friction section for selectively transmitting rotation from the resilient means to the outer friction section; e. the resilient means providing a preload with respect to the outer friction section for retarding rotation of the inner brake section when the outer friction section is engaged by the actuating means but being free to slip relative to the outer friction section when the load applied by the actuating means exceeds the preload.
Claim 2
Dependent Claim
179 words
A clutch brake assembly for cooperating with a rotatable driven shaft and a stationary housing comprising, a. an inner brake section drivingly connected to the rotatable driven shaft for rotation therewith; b. an outer friction section movable into engagement with the stationary housing; c. an actuating means movable into engagement with the outer friction section for applying a load to the outer friction section to engage the same with the stationary housing for retarding rotation of the outer friction section; d. a resilient means positively connected to the inner brake section for transmitting rotation from the inner brake section to the resilient means and frictionally connected to the outer friction section for selectively transmitting rotation from the resilient means to the outer friction section; e. the resilient means providing a preload with respect to the outer friction section for retarding rotation of the inner brake section when the outer friction section is engaged by the actuating means but being free to slip relative to the outer friction section when the load applied by the actuating means exceeds the preload.
Claim 3
Dependent Claim
25 words
A clutch brake assembly as recited in claim 1, wherein the resilient means is located intermediate the inner brake section and the outer friction section.
Claim 4
Dependent Claim
19 words
A clutch brake assembly as recited in claim 1, wherein the resilient means includes at least one Belleville washer.
Claim 5
Dependent Claim
26 words
A clutch brake assembly as recited in claim 3, wherein the Belleville washer is positively coupled to the inner brake section by a lost-motion coupling connection.
Claim 6
Dependent Claim
37 words
A clutch brake assembly as recited in claim 4, wherein the lost-motion coupling connection includes at least one drive lug on the inner brake section and at least one mating circumferentially extending slot on the Belleville washer.
Claim 7
Dependent Claim
34 words
A clutch brake assembly as recited in claim 1, wherein the outer friction section includes a first friction element engageable by the actuating means and a second friction element engageable with the stationary housing.
Claim 8
Dependent Claim
29 words
A clutch brake assembly as recited in claim 6, wherein the first and second friction elements are spaced apart and secured together and the resilient means is preloaded therebetween.
Claim 9
Dependent Claim
43 words
A clutch brake assembly as recited in claim 7, wherein the Belleville washer and inner brake section are located in the space between the first and second friction elements and the friction elements enclose and retain the same to form a unitary assembly.
Claim 10
Dependent Claim
20 words
A clutch brake assembly as recited in claim 7, wherein the resilient means includes a pair of opposed Belleville washers.
Claim 11
Dependent Claim
25 words
A clutch brake as recited in claim 9, wherein the first and second friction elements have inner friction surfaces for engaging the opposed Belleville washers.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |