US3731767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Braking device including anti-skid means
Assignee: Individual
•
Filing: 1971-05-13
•
Granted: 1973-05-08
•
Expires: 1991-05-13
Abstract
Abstract A wheel braking system including first and second sections rotatable relative to each other and to a wheel support structure about coinciding axes. A first vehicle operator controlled brake assembly is provided for braking the first section relative to the support structure and the second section includes structure for mounting a vehicle wheel thereon. Also, second brake structure is provided for braking the second section against rotation relative to the first section with a predetermined minimum braking action and includes automatic control structure to increase the braking action thereof to prevent rotation of the second section relative to the first section in response to the second section rotating relative to the first section. Also, the second brake structure controls are operative, in response to termination of rotation of the second section relative to the first section due to an increased braking action thereon by the second brake structure as a result of rotation of the second section relative to the first section, to reduce the braking action of the second section relative to the first section to the aforementioned predetermined braking action or force, whereby full application of the operator controlled brake assembly of a vehicle will result in the braked wheel or wheels of that vehicle being braked by rapidly alternating increasing and decreasing braking forces even though the operator of the vehicle may ''''freeze'''' on the brake control with the latter fully applied.
Inventors
- 👤 L Lefort
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:41
CPC Classifications
B; B60; B60T; B60T1/00; B60T1/02; B60T1/06; B60T1/065; B60T8/00; B60T8/32; B60T8/34
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
106 words
In a wheel braking system including first and second sections journaled from a wheel support structure for rotation relative thereto and each other about coinciding axes and having first brake means for selectively braking the second section relative to said support structure and second fluid actuated brake means for braking said first section against rotation relative to said second section, said first section including an outer peripheral portion spaced radially outwardly from and extending about said coinciding axes defining a fluid reservoir for said system, at least some of said outer peripheral portion defining said reservoir being constructed of a material having good heat transfer properties.
Claim 2
Dependent Claim
106 words
In a wheel braking system including first and second sections journaled from a wheel support structure for rotation relative thereto and each other about coinciding axes and having first brake means for selectively braking the second section relative to said support structure and second fluid actuated brake means for braking said first section against rotation relative to said second section, said first section including an outer peripheral portion spaced radially outwardly from and extending about said coinciding axes defining a fluid reservoir for said system, at least some of said outer peripheral portion defining said reservoir being constructed of a material having good heat transfer properties.
Claim 3
Dependent Claim
93 words
In a braking system including first and second relatively rotatable sections, brake means operatively connected between said sections continuously applying a predetermined minimum braking force on said sections against relative rotation of the latter, said brake means including initially preloaded actuating spring means and fluid pressure controlled assist means for automatically progressively increasing the loading of said spring means in response to relative rotation of said sections and automatically decreasing the loading of said spring means back toward said predetermined braking force in response to subsequent termination of relative rotation of said sections.
Claim 4
Dependent Claim
93 words
In a braking system including first and second relatively rotatable sections, brake means operatively connected between said sections continuously applying a predetermined minimum braking force on said sections against relative rotation of the latter, said brake means including initially preloaded actuating spring means and fluid pressure controlled assist means for automatically progressively increasing the loading of said spring means in response to relative rotation of said sections and automatically decreasing the loading of said spring means back toward said predetermined braking force in response to subsequent termination of relative rotation of said sections.
Claim 5
Dependent Claim
93 words
The combination of claim 2 wherein said assist means includes a fluid pressure actuating system, said first and second sections including fluid pumping means with a fluid pressure output means communicated with said actuating system, said fluid pumping system including means operative to develop fluid pressure in said output means in response to relative rotation between said first and second sections, said fluid pressure actuating system including fluid pressure bleed off means operable to bleed fluid pressure from said system in response to termination of relative rotation between said first and second sections.
Claim 6
Dependent Claim
39 words
The combination of claim 2, wherein said brake means includes coacting friction surfaces carried by said first and second sections, and pump means operative, in response to relative rotation of said sections, to pump cooling fluid over said surfaces.
Claim 7
Dependent Claim
35 words
The combination of claim 4, wherein said system includes an oil reservoir carried by one of said sections from and to which said cooling fluid is pumped in response to relative rotation of said sections.
Claim 8
Dependent Claim
40 words
The combination of claim 5 wherein said means for increasing the loading of said spring means includes fluid pressure actuator means to which fluid under pressure is supplied in from said pump in response to relative rotation of said sections.
Claim 9
Dependent Claim
45 words
The combination of claim 6, including excess pressure sensing means operative to sense excess pressure at said fluid pressure actuator means and to prevent further build up of fluid pressure at said fluid pressure actuator means in response to further relative rotation of said sections.
Claim 10
Dependent Claim
173 words
A support structure, an assembly journaled on said support structure for 360* rotation relative thereto, said assembly including first and second sections each rotatable relative to each other and said support structure about the axis of rotation of said assembly relative to said support structure, said assembly further including first brake means operatively associated with said sections continuouslY braking said sections against rotation relative to each other with a predetermined minimum braking force, said first brake means including fluid pressure controlled assist means operative, in response to relative rotation of said sections, to progressively increase the braking force of said brake means to terminate relative rotation of said sections, and operative in response to subsequent termination of relative rotation of said sections, to progressively reduce said braking force back toward said predetermined braking force, and second brake means operative to variably brake said second section relative to said support structure with a braking force ranging between a braking force below said predetermined braking force and a braking force above said predetermined braking force.
Claim 11
Dependent Claim
173 words
A support structure, an assembly journaled on said support structure for 360* rotation relative thereto, said assembly including first and second sections each rotatable relative to each other and said support structure about the axis of rotation of said assembly relative to said support structure, said assembly further including first brake means operatively associated with said sections continuouslY braking said sections against rotation relative to each other with a predetermined minimum braking force, said first brake means including fluid pressure controlled assist means operative, in response to relative rotation of said sections, to progressively increase the braking force of said brake means to terminate relative rotation of said sections, and operative in response to subsequent termination of relative rotation of said sections, to progressively reduce said braking force back toward said predetermined braking force, and second brake means operative to variably brake said second section relative to said support structure with a braking force ranging between a braking force below said predetermined braking force and a braking force above said predetermined braking force.
Claim 12
Dependent Claim
22 words
The combination of claim 8, wherein said support structure includes a wheel support structure and said assembly includes a wheel supported therefrom.
Claim 13
Dependent Claim
18 words
The combination of claim 9, wherein said wheel is mounted on said first section against rotation relative thereto.
Claim 14
Dependent Claim
92 words
The combination of claim 8 wherein said first brake means includes a spring pre-loaded brake assembly including a fluid pressure booster section, said sections including portions thereof defining the stator and rotor components of a fluid pump operative to pump fluid under pressure to said fluid pressure booster section in response to relative rotation between said sections, said fluid pressure booster section including a throttled fluid pressure relief for relieving the fluid pressure in said fluid pressure booster section in response to termination of relative rotation of said first and second sections.
Claim 15
Dependent Claim
74 words
The combination of claim 11, wherein said fluid pressure booster section includes a fluid reservoir extending about the outer periphery of said first section and which is therefore subject to cooling by the ambient fluid whenever said first section is rotating relative to said support structure, said support structure including a wheel support structure and said assembly including a wheel journaled therefrom, said wheel being mounted on said first section against rotation relative thereto.
Claim 16
Dependent Claim
46 words
The combination of claim 11, wherein said fluid pressure booster section includes a fluid reservoir extending about the outer periphery of said first section and which is therefore subject to cooling by the ambient fluid whenever said first section is rotating relative to said support structure.
Claim 17
Dependent Claim
93 words
The combination of claim 8, wherein said assist means includes a fluid pressure actuating system, said first and second sections including fluid pumping means with a fluid pressure output means communicated with said actuating system, said fluid pumping system including means operative to develope fluid pressure in said output means in response to relative rotation between said first and second sections, said fluid pressure actuating system including fluid pressure bleed off means operable to bleed fluid pressure from said system in response to termination of relative rotation between said first and second sections.
Claim 18
Dependent Claim
38 words
The combination of claim 13, wherein said reservoir includes an expandable section to compensate for expansion and contraction of the brake actuating fluid of said fluid pressure booster section as the temperature of said actuating fluid is varied.
Claim 19
Dependent Claim
56 words
The combination of claim 15 wherein said fluid pressure actuating system comprises a closed system including a fluid reservoir from which fluid is pumped in response to relative rotation between said first and second sections, said fluid pressure bleed off means being operative to bleed fluid pressure from said fluid pressure output means to said reservoir.
Claim 20
Dependent Claim
38 words
The combination of claim 16, wherein said fluid reservoir is defined in an outer peripheral portion of said first section extending about and spaced radially outwardly from the axis of relative rotation of said first and second sections.
References Cited (Backward Citations)
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Cited
US1974390A
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US2344933A
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US2596556A
Cited
US2786560A
Cited
US3260331A
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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) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |