US4281881A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-locking mechanism
Assignee: THAYCO TRAILER Corp A PA CORP
•
Filing: 1979-04-03
•
Granted: 1981-08-04
•
Expires: 1999-04-03
Abstract
Abstract An anti-locking mechanism includes an assembly attached to move with a wheel of a vehicle. The assembly includes a spring biased inertia wheel movably mounted to a manifold. A valve connected to control the application of braking pressure is normally held closed when the inertia wheel and manifold are rotated at the same rate by the wheel. When the vehicle wheel is decelerated at an excessive rate, the inertia wheel overcomes the bias of the spring and continues to rotate about the manifold to open the valve and prevent braking pressure from being applied to the wheel.
Inventors
- 👤 George Mekosh, Jr.
- 👤 David O. Hulse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:33
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/72; B60T8/74; Y; Y10; Y10S; Y10S303/00; Y10S303/08
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
366 words
In combination with a source of pressure for actuating a brake for decelerating a vehicle wheel and means for selectively applying the pressure to the brake, control means for permitting or preventing said pressure from being applied to the brake when the wheel is decelerated beyond a predetermined limit comprising: (a) a first rotatable member adapted to be fixedly attached to and rotated with said wheel and adapted to control said source of pressure, said first rotatable member being a manifold having an opening therein disposed between said source of pressure and atmosphere, (b) a second rotatable member movably mounted to said first rotatable member, said second rotatable member being an inertia wheel disposed to rotate with said manifold and to continue to rotate relative to said manifold when said manifold is decelerated beyond a predetermined rate, (c) valve means responsive to the relative positions of said first and second members with respect to each other disposed to close or open to control the pressure applied to said brake, and stop means for normally driving said first and second members during normal movement of said wheel and for limiting relative movement of said members during deceleration, said stop means further restricting relative movement of said members after limited movement there between, (d) means for maintaining the relative positions of said first and second members during normal rotation of said wheel to maintain said valve means closed to permit pressure to be applied to said brake, (e) said first and second members being relatively rotated with respect to each other to open said valve means when said wheel is decelerated beyond said predetermined rate to prevent pressure from being applied to said brake and biasing means connected between said members urging said valve means closed, (f) manual means for changing the relative position of said first and second rotatable members for manually checking the operation of said control means, said manual means comprising means normally free of said first and second rotational members and including frictional means for contacting one of said members to permit said one member to be rotated with respect to the other member to open said valve when said manual means are operated.
Claim 2
Dependent Claim
366 words
In combination with a source of pressure for actuating a brake for decelerating a vehicle wheel and means for selectively applying the pressure to the brake, control means for permitting or preventing said pressure from being applied to the brake when the wheel is decelerated beyond a predetermined limit comprising: (a) a first rotatable member adapted to be fixedly attached to and rotated with said wheel and adapted to control said source of pressure, said first rotatable member being a manifold having an opening therein disposed between said source of pressure and atmosphere, (b) a second rotatable member movably mounted to said first rotatable member, said second rotatable member being an inertia wheel disposed to rotate with said manifold and to continue to rotate relative to said manifold when said manifold is decelerated beyond a predetermined rate, (c) valve means responsive to the relative positions of said first and second members with respect to each other disposed to close or open to control the pressure applied to said brake, and stop means for normally driving said first and second members during normal movement of said wheel and for limiting relative movement of said members during deceleration, said stop means further restricting relative movement of said members after limited movement there between, (d) means for maintaining the relative positions of said first and second members during normal rotation of said wheel to maintain said valve means closed to permit pressure to be applied to said brake, (e) said first and second members being relatively rotated with respect to each other to open said valve means when said wheel is decelerated beyond said predetermined rate to prevent pressure from being applied to said brake and biasing means connected between said members urging said valve means closed, (f) manual means for changing the relative position of said first and second rotatable members for manually checking the operation of said control means, said manual means comprising means normally free of said first and second rotational members and including frictional means for contacting one of said members to permit said one member to be rotated with respect to the other member to open said valve when said manual means are operated.
Claim 3
Dependent Claim
34 words
The invention as set forth in claim 1 wherein said valve means includes a spring loaded valve in said second rotatable member disposed to block or unblock said opening in said first rotatable member.
Claim 4
Dependent Claim
28 words
The invention as set forth in claim 2 wherein said spring loaded valve is disposed perpendicular to the planes of rotation of said first and second rotatable members.
Claim 5
Dependent Claim
212 words
In combination with a source of pressure for actuating a brake for decelerating a wheel on a vehicle, control means for permitting or preventing the application of said pressure to said brake of said wheel, comprising: (a) a rotatable manifold member attached to be rotated with said wheel and including an aperture between a chamber leading to a second source of pressure and atmosphere, (b) an inertia wheel movably mounted to said manifold member to rotate within predetermined limits thereon during acceleration and deceleration of said wheel, (c) valve means included in said inertia wheel to close or open said aperture leading from said chamber to atmosphere, (d) stop means connected between said inertia wheel and said manifold member to normally rotate said inertia wheel at the same rate of speed as said manifold member and to normally maintain said valve means in a closed condition, (e) said stop means being disposed to permit continued movement of said inertia wheel with respect to said manifold member when said wheel is decelerated beyond said predetermined limit to open said valve means thereby to permit the pressure from said second source of pressure to be relieved through the aperture in said manifold member to atmosphere to prevent said braking pressure from actuating said brake.
Claim 6
Dependent Claim
212 words
In combination with a source of pressure for actuating a brake for decelerating a wheel on a vehicle, control means for permitting or preventing the application of said pressure to said brake of said wheel, comprising: (a) a rotatable manifold member attached to be rotated with said wheel and including an aperture between a chamber leading to a second source of pressure and atmosphere, (b) an inertia wheel movably mounted to said manifold member to rotate within predetermined limits thereon during acceleration and deceleration of said wheel, (c) valve means included in said inertia wheel to close or open said aperture leading from said chamber to atmosphere, (d) stop means connected between said inertia wheel and said manifold member to normally rotate said inertia wheel at the same rate of speed as said manifold member and to normally maintain said valve means in a closed condition, (e) said stop means being disposed to permit continued movement of said inertia wheel with respect to said manifold member when said wheel is decelerated beyond said predetermined limit to open said valve means thereby to permit the pressure from said second source of pressure to be relieved through the aperture in said manifold member to atmosphere to prevent said braking pressure from actuating said brake.
Claim 7
Dependent Claim
39 words
The invention as set forth in claim 4 wherein said stop means includes a pair of spaced pins on said inertia wheel and a pin on said manifold member disposed to be moved between said pair of stop pins.
Claim 8
Dependent Claim
70 words
The invention as set forth in claim 5 wherein friction means are provided between said wheel and said manifold member to normally cause said manifold member to be moved by said wheel, the friction of said friction means being overcome when said manifold member and inertia wheel are moved in unison after the stop limit has been reached by excessive deceleration, whereby excess energy in said inertia wheel is absorbed.
Claim 9
Dependent Claim
28 words
The invention as set forth in claim 6 wherein a hub cap is attached to said wheel and said manifold member is secured thereto through said friction means.
Claim 10
Dependent Claim
19 words
The invention as set forth in claim 7 wherein said friction means comprises an "O" ring for providing sealing.
Claim 11
Dependent Claim
47 words
The invention as set forth in claim 6 wherein said inertia wheel and said manifold member include attachment pins with a spring attached therebetween to normally urge said valve means to a closed position and to provide the threshold at which said valve means opens and closes.
Claim 12
Dependent Claim
49 words
The invention as set forth in claim 9 wherein a manually accessible control knob is disposed to be operated to contact said inertia wheel to permit said inertia wheel to be manually rotated with respect to said manifold member to open said valve means to check the operation thereof.
Claim 13
Dependent Claim
46 words
The invention as set forth in claim 10 wherein said valve means includes a spring loaded stem in said inertia wheel normally in alignment to block the aperture in said manifold member, said stem being disposed perpendicular to the plane of rotation of said manifold member.
Claim 14
Dependent Claim
40 words
The invention as set forth in claim 6 wherein a housing including a cover and lid is provided to house said inertia wheel and a portion of said manifold member, said lid being disposed between said manifold and said hub.
Claim 15
Dependent Claim
36 words
The invention as set forth in claim 12 wherein a connector element connects said cover of said housing to said manifold member whereby said cover may be manually gripped and rotated to rotate said manifold member.
Claim 16
Dependent Claim
47 words
The invention as set forth in claim 13 wherein rotation of said cover beyond a predetermined speed causes said manifold member to move relative to said inertia wheel to open said valve means in said inertia wheel to open said aperture leading from said chamber to atmosphere.
Claim 17
Dependent Claim
45 words
The invention as set forth in claim 14 wherein relative rotation between said inertia wheel and said manifold member beyond a predetermined distance causes said stop means to become operative to rotate said inertia wheel and said manifold member at the same rate of speed.
Claim 18
Dependent Claim
56 words
The invention as set forth in claim 15 wherein said wheel includes a hub cap and wherein a pair of friction washers are provided, with one washer being disposed between said lid and the outer surface of said hub cap, and the other friction washer being secured to engage the inner surface of said hub cap.
Claim 19
Dependent Claim
31 words
The invention as set forth in claim 16 wherein means including a spring wavy washer is provided to secure said other friction washer against the inner surface of said hub cap.
Claim 20
Dependent Claim
24 words
The invention as set forth in claim 17 wherein a pair of tab washers are provided on either side of said spring wavy washer.
Claim 21
Dependent Claim
72 words
The invention as set forth in claim 18 wherein relative rapid manual rotation of said cover causes relative displacement of said manifold member with respect to said inertia wheel to test the operation of said valve means, with the continued further rotation causing said stop means to become operative to cause said manifold to slide on said pair of friction washers to test the operation of energy absorption in said control means.
Claim 22
Dependent Claim
21 words
The invention as set forth in claim 4 wherein manual means are provided to check the operation of said valve means.
Claim 23
Dependent Claim
22 words
The invention as set forth in claim 19 wherein said manual means comprises a cover attached to a hub of said wheel.
Claim 24
Dependent Claim
26 words
The invention as set forth in claim 21 wherein an energy absorption system is provided with said manual means being connected to check the operation thereof.
References Cited (Backward Citations)
US3441320A
Cited
US3752268A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-03 | 1985-02-02 | 1985-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-03 | 1989-02-02 | 1989-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-03 | 1993-02-02 | 1993-08-04 | $7700.00 | Window Closed / Lapsed |