US3833097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-locking arrangement for fluid pressure actuated brake
Assignee: Individual
•
Filing: 1973-09-26
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Granted: 1974-09-03
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Expires: 1993-09-26
Abstract
Abstract In a fluid pressure actuated brake for slowing a rotating member and having a conduit through which actuating pressure is applied and a valve interposed in the conduit for controllably interrupting the application of pressure, locking of the brake is prevented by an arrangement in which forces are exerted on a mass including a flywheel supported for oscillating movement by a spring which biases the flywheel toward a central position, a coupling operatively interconnecting the flywheel and the valve and transmitting force opposing the spring force which is derived from the application of actuating pressure to the valve, and a motive device controllably exerting a force opposing the spring force. By controlling application of the last mentioned force, in response to the sensed rate of the retardation of or tendency to lock the rotating member, oscillation of a vibrating system defined by the mass and spring is initiated and maintained only during such time as the sensed rate of retardation exceeds a desired predetermined rate and such oscillating movement of the vibrating system including the mass is employed to interrupt the application of pressure to the brake.
Inventors
- 👤 J Holst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:12
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/34; B60T8/42; B60T8/4208; B60T8/4266; B60T8/72; B60T8/74
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
301 words
In a fluid pressure actuated brake for slowing a rotating member and having a conduit through which actuating pressure is applied and valve means interPosed in said conduit for controllably interrupting and releasing the application of pressure, an arrangement for preventing locking of the brake and comprising: a mass supported for oscillating movement, in alternate directions from a central position, spring means operatively connected with said mass for defining therewith a vibrating system having a resonant frequency and for exerting force biasing said mass toward said central position, coupling means operatively interconnecting said mass and said valve means for maintaining said valve means in position for application of pressure while said mass is in said central position and for transmitting to said mass force opposing said spring means force and derived from application of actuating pressure to said valve means, motive means operatively connected with said mass for controllably exerting on said mass force opposing said spring means force, first control means operatively connected with said rotating member for sensing the rate of retardation thereof and for signaling the occurrence of a rate of retardation in excess of a predetermined rate, and second control means operatively connected with said first control means, said means and said motive means for responding to the signaling of the occurrence of an excessive rate of retardation of said rotating member by actuating said motive means to exert force on said mass and for responding to movement of said mass by periodically interrupting actuation of said motive means, said motive means force displacing said mass from said central position to initate oscillating movement thereof and cooperating with said coupling means force during application of pressure in maintaining such oscillation of said mass for so long as the sensed rate of retardation exceeds said desired predetermined rate.
Claim 2
Dependent Claim
301 words
In a fluid pressure actuated brake for slowing a rotating member and having a conduit through which actuating pressure is applied and valve means interPosed in said conduit for controllably interrupting and releasing the application of pressure, an arrangement for preventing locking of the brake and comprising: a mass supported for oscillating movement, in alternate directions from a central position, spring means operatively connected with said mass for defining therewith a vibrating system having a resonant frequency and for exerting force biasing said mass toward said central position, coupling means operatively interconnecting said mass and said valve means for maintaining said valve means in position for application of pressure while said mass is in said central position and for transmitting to said mass force opposing said spring means force and derived from application of actuating pressure to said valve means, motive means operatively connected with said mass for controllably exerting on said mass force opposing said spring means force, first control means operatively connected with said rotating member for sensing the rate of retardation thereof and for signaling the occurrence of a rate of retardation in excess of a predetermined rate, and second control means operatively connected with said first control means, said means and said motive means for responding to the signaling of the occurrence of an excessive rate of retardation of said rotating member by actuating said motive means to exert force on said mass and for responding to movement of said mass by periodically interrupting actuation of said motive means, said motive means force displacing said mass from said central position to initate oscillating movement thereof and cooperating with said coupling means force during application of pressure in maintaining such oscillation of said mass for so long as the sensed rate of retardation exceeds said desired predetermined rate.
Claim 3
Dependent Claim
58 words
Apparatus according to claim 1 wherein said coupling means force is less than the opposed spring means force at all positions of displacement of said mass from said central position and further wherein said motive means force is a limited force sufficient when added to said coupling means force to displace said mass through a determinable oscillatory movement.
Claim 4
Dependent Claim
34 words
Apparatus according to claim 1 wherein said mass is supported for rotary oscillating movement about a predetermined axis and said spring means comprises a helical torsion spring having one end fixed to said mass.
Claim 5
Dependent Claim
29 words
Apparatus according to claim 3 wherein said helical torsion spring is mounted concentric with said predetermined axis and has the other end thereof stationarily fixed relative to said mass.
Claim 6
Dependent Claim
66 words
Apparatus according to claim 1 wherein said coupling means comprises cam surface means mounted for movement with said mass and cooperating cam follower means operatively connected with said valve means for displacing said valve means upon movement of said mass toward and away from said central position and for applying to said cam surface means force derived from application of actuating pressure to said valve means.
Claim 7
Dependent Claim
65 words
Apparatus according to claim 5 particularly adapted for blocking said valve means in flow permitting position in the event of failure and wherein said cam surface means defines a notch portion remote from a normal range of displacement of said mass, said notch portion for receiving and entrapping said cam follower means upon movement of said mass beyond said normal range upon occurrence of failure.
Claim 8
Dependent Claim
119 words
Apparatus according to claim 1 wherein said first control means comprises a first member fixed to said rotating member for rotation therewith about a rotational axis, a second member mounted for rotational movement relative to said first member and about the rotational axis thereof, spring means operatively connecting said first and second members for biasing said members toward a predetermined relationship one to another and for imposing on asid second member forces normally coupling said first and second members together for rotation, and electrical switch meAns operatively associated with said second member for actuation thereby upon subjection of said members to rates of change of said coupled rotation forces sufficient to overcome the biasing force of said spring means.
Claim 9
Dependent Claim
47 words
Apparatus according to claim 1 wherein said motive means comprises a reversible electrical motor and said control means comprises reversing switch means electrically connected with said reversible motor for periodically reversing the direction of rotation thereof and thereby for driving said mass in alternate directions of oscillation.
Claim 10
Dependent Claim
48 words
Apparatus according to claim 1 wherein said motive means comprises an electrical motor and said second control means comprises a direction responsive switch means electrically connected for periodically interrupting the exertion of force by said motor and thereby for driving said mass only in one direction of oscillation.
Claim 11
Dependent Claim
40 words
Apparatus according to claim 9 wherein said second control means further comprises clutch means interposed between said electrical motor and said mass and responsive to said direction responsive switch means for interconnecting and disconnecting said electrical motor and said mass.
Claim 12
Dependent Claim
50 words
Apparatus according to claim 1 further comprising driven gear means mounted on said mass for transferring said motive means force thereto and drive gear means meshing with said driven gear means and operatively connected with said motive means for effective transfer of motive means force to said driven gear means.
Claim 13
Dependent Claim
69 words
Apparatus according to claim 11 particularly adapted for blocking said valve means in flow permitting position in the event of failure and wherein said driven gear means defines an interrupted portion remote from a normal range of displacement of said mass, said interrupted portion for effectively disengaging said drive gear means and said driven gear means upon movement of said mass beyond said normal range upon occurrence of failure.
Claim 14
Dependent Claim
201 words
Apparatus for controllably interrupting the application of pressure through a valve means and comprising: a mass supported for rotary oscillating movement about a predetermined axis and in alternate directions from a central position, helical torsion spring means having one end thereof fixed to said mass and the other end thereof stationarily fixed relative to said mass, said spring means defining with said mass a vibrating system having a resonant frequency and exerting force biasing said mass toward said central position, means operatively interconnecting said mass and said valve for maintaining said valve in flow permitting position while said mass is in said central position and for transmitting to said mass upon displacement thereof from said central position force opposing said spring means force and derived from pressure within said valve means, electrical motor means for driving connection with said mass and for controllably exerting on said mass a force opposing said spring means force, and control means operatively connected with said mass and said motor means and operable for actuating said motor means to exert force displacing said mass from said central position and for responding to movement of said mass by periodically interrupting exertion of force by said motor means.
Claim 15
Dependent Claim
201 words
Apparatus for controllably interrupting the application of pressure through a valve means and comprising: a mass supported for rotary oscillating movement about a predetermined axis and in alternate directions from a central position, helical torsion spring means having one end thereof fixed to said mass and the other end thereof stationarily fixed relative to said mass, said spring means defining with said mass a vibrating system having a resonant frequency and exerting force biasing said mass toward said central position, means operatively interconnecting said mass and said valve for maintaining said valve in flow permitting position while said mass is in said central position and for transmitting to said mass upon displacement thereof from said central position force opposing said spring means force and derived from pressure within said valve means, electrical motor means for driving connection with said mass and for controllably exerting on said mass a force opposing said spring means force, and control means operatively connected with said mass and said motor means and operable for actuating said motor means to exert force displacing said mass from said central position and for responding to movement of said mass by periodically interrupting exertion of force by said motor means.
Claim 16
Dependent Claim
92 words
Apparatus according to claim 13 wherein said electrical motor means comprises a reversible motor for driving said mass in movement in alternate directions and further wherein said motor means and said control means cooperate for exertion of said motor means force in opposition to said spring means force during the first and third quarters of each cycle of oscillatory displacement of said mass from said central position and for exertion of said motor means force in supplementation of said spring means force during the second and fourth quarter of each such cycle.
Claim 17
Dependent Claim
189 words
In an automotive vehicle braking system having a rotating wheel, a conduit through which fluid under pressure is delivered for braking the rotation of the wheel, a valvE interposed in the conduit for controllably interrupting and releasing the application of pressure, a vibrating system of a mass and spring operatively connected with the valve for normally maintaining the valve in position for application of pressure and cooperating with the valve in interrupting and releasing the application of pressure, and a sensor rotating with the wheel for detecting the rate of retardation of rotation thereof and for signaling the occurrence of a rate of retardation in excess of a predetermined rate, that improvement which comprises motive means mechanically coupled to said mass for controllably exerting thereon force opposing said spring and control means operatively connected with said sensor, said mass and said motive means for responding to the signaling of the occurrence of an excessive rate of retardation of said wheel by actuating said motive means to exert force on said mass and for responding to movement of said mass by periodically interrupting exertion of force by said motive means.
Claim 18
Dependent Claim
189 words
In an automotive vehicle braking system having a rotating wheel, a conduit through which fluid under pressure is delivered for braking the rotation of the wheel, a valvE interposed in the conduit for controllably interrupting and releasing the application of pressure, a vibrating system of a mass and spring operatively connected with the valve for normally maintaining the valve in position for application of pressure and cooperating with the valve in interrupting and releasing the application of pressure, and a sensor rotating with the wheel for detecting the rate of retardation of rotation thereof and for signaling the occurrence of a rate of retardation in excess of a predetermined rate, that improvement which comprises motive means mechanically coupled to said mass for controllably exerting thereon force opposing said spring and control means operatively connected with said sensor, said mass and said motive means for responding to the signaling of the occurrence of an excessive rate of retardation of said wheel by actuating said motive means to exert force on said mass and for responding to movement of said mass by periodically interrupting exertion of force by said motive means.
Claim 19
Dependent Claim
89 words
In an automotive vehicle hydraulic pressure brake system having an oscillating mass-spring system for actuating a valve in a hydraulic line to alternately release and apply hydraulic pressure, that improvement which comprises motive means for exerting on the mass force moving the mass in a first direction, means for sensing a reversal in direction of movement of the mass, and means responsive to said sensing means for interrupting the exertion of said motive means force on said mass upon the sensed reversal in direction of movement of the mass.
Claim 20
Dependent Claim
89 words
In an automotive vehicle hydraulic pressure brake system having an oscillating mass-spring system for actuating a valve in a hydraulic line to alternately release and apply hydraulic pressure, that improvement which comprises motive means for exerting on the mass force moving the mass in a first direction, means for sensing a reversal in direction of movement of the mass, and means responsive to said sensing means for interrupting the exertion of said motive means force on said mass upon the sensed reversal in direction of movement of the mass.
Claim 21
Dependent Claim
308 words
In a hydraulic pressure actuated brake for slowing a rotating member and having a conduit through which hydraulic pressure is applied and valve means interposed in said conduit for controllably interrupting and releasing the application of pressure, an arrangement for preventing locking of the brake and comprising: a mass supported for oscillating movement, in alternate directions from a central position, spring means operatively connected with said mass for defining therewith a vibrating system and for exerting force biasing said mass toward said central position, coupling means operatively interconnecting said mass and said valve means for maintaining said valve means in position for application of hydraulic pressure to said brake while said mass is in said central position and for transmitting to said mass force opposing said spring means force and derived from application of hydraulic pressure to said valve means, motive means operatively connected with said mass for controllably exerting on said mass force at least initially opposing said spring means force, first control means for sensing the tendency of said rotating member to lock and for signaling the occurrence of such a tendency, and second control means operatively connected with said first control means, said mass and said motive means for responding to the signaling of the occurrence of a tendency of said rotating member to lock by actuating said motive means to exert force on said mass and including means for sensing reversal of direction of movement of said mass and for interrupting such exertion of force when reversal of movement of said mass is sensed, said motive means force displacing said mass from said central position to initiate oscillating movement thereof and cooperating with said coupling means force during application of hydraulic pressure in maintaining such oscillation of said mass for so long as there is a sensed tendency of the rotating member to lock.
Claim 22
Dependent Claim
308 words
In a hydraulic pressure actuated brake for slowing a rotating member and having a conduit through which hydraulic pressure is applied and valve means interposed in said conduit for controllably interrupting and releasing the application of pressure, an arrangement for preventing locking of the brake and comprising: a mass supported for oscillating movement, in alternate directions from a central position, spring means operatively connected with said mass for defining therewith a vibrating system and for exerting force biasing said mass toward said central position, coupling means operatively interconnecting said mass and said valve means for maintaining said valve means in position for application of hydraulic pressure to said brake while said mass is in said central position and for transmitting to said mass force opposing said spring means force and derived from application of hydraulic pressure to said valve means, motive means operatively connected with said mass for controllably exerting on said mass force at least initially opposing said spring means force, first control means for sensing the tendency of said rotating member to lock and for signaling the occurrence of such a tendency, and second control means operatively connected with said first control means, said mass and said motive means for responding to the signaling of the occurrence of a tendency of said rotating member to lock by actuating said motive means to exert force on said mass and including means for sensing reversal of direction of movement of said mass and for interrupting such exertion of force when reversal of movement of said mass is sensed, said motive means force displacing said mass from said central position to initiate oscillating movement thereof and cooperating with said coupling means force during application of hydraulic pressure in maintaining such oscillation of said mass for so long as there is a sensed tendency of the rotating member to lock.
Claim 23
Dependent Claim
34 words
Apparatus according to claim 17 wherein said motive means comprises a reversible electrical motor and said means for interrupting exertion of force comprises means for reversing the direction of rotation of said electrical motor.
Claim 24
Dependent Claim
56 words
Apparatus according to claim 17 wherein said coupling means force is less than the opposed spring means force at all positions of displacement of said mass from said central position and further wherein Said motive means force is a limited force sufficient when added to said coupling means force to maintain oscillatory movement of said mass.
Claim 25
Dependent Claim
68 words
Apparatus according to claim 19 wherein said coupling means comprises cam surface means mounted for movement in coordination with said mass and cooperating cam follower means operatively connected with said valve means for displacing said valve means upon movement of said mass toward and away from said central position and for applying to said cam surface means force derived from application of hydraulic pressure to said valve means.
Claim 26
Dependent Claim
50 words
Apparatus according to claim 17 wherein said mass is supported for rotary oscillating movement about a predetermined axis and said spring means comprises a helical torsion spring mounted concentric with said axis and having one end fixed to said mass and the other end stationarily fixed relative to said mass.
Claim 27
Independent Claim
212 words
A method of avoiding locking of a rotatable member which is braked by a fluid pressure brake comprising the steps of: passing pressurized actuating fluid for the brake through a control valve, biasing a member of an oscillating system toward a central state while permitting displacement thereof in alternate directions from the central state, normally maintaining the valve in flow permitting condition in correlation with the central state of the oscillating system member, sensing any occurrence of a rate of retardation of the rotatable member which exceeds a predetermined rate indicative of a tendency of the rotatable member to lock, responding to sensed excessive rates of retardation by imposing on the oscillating system member energy effecting initiation of displacement thereof from the central state in opposition to the bias exerted thereon, interrupting braking of the rotatable member by changing the control valve to flow and pressure releasing blocking condition in correlation with displacement of the oscillating system member, sensing initiation of return of the oscillating system member toward the central state, responding to sensed initiation of return by interrupting imposition of energy on the oscillating system member, and continuing periodic imposition of energy on the oscillating system member for so long as the rate of retardation of the rotatable member is excessive.
Claim 28
Independent Claim
212 words
A method of avoiding locking of a rotatable member which is braked by a fluid pressure brake comprising the steps of: passing pressurized actuating fluid for the brake through a control valve, biasing a member of an oscillating system toward a central state while permitting displacement thereof in alternate directions from the central state, normally maintaining the valve in flow permitting condition in correlation with the central state of the oscillating system member, sensing any occurrence of a rate of retardation of the rotatable member which exceeds a predetermined rate indicative of a tendency of the rotatable member to lock, responding to sensed excessive rates of retardation by imposing on the oscillating system member energy effecting initiation of displacement thereof from the central state in opposition to the bias exerted thereon, interrupting braking of the rotatable member by changing the control valve to flow and pressure releasing blocking condition in correlation with displacement of the oscillating system member, sensing initiation of return of the oscillating system member toward the central state, responding to sensed initiation of return by interrupting imposition of energy on the oscillating system member, and continuing periodic imposition of energy on the oscillating system member for so long as the rate of retardation of the rotatable member is excessive.
Claim 29
Dependent Claim
217 words
In a method of avoiding locking of a rotatable member braked by a fluid pressure brake which includes passing pressurized actuating fluid for the brake through a control valve, biasing a member of an oscillating system toward a central state while permitting displacement thereof in alternate directions from the central state, normally maintaining the valve in flow permitting condition in correlation with the central state of the oscillating system member, and interrupting braking of the rotatable member by changing the control valve to flow blocking and pressure releasing condition in correlation with displacement of the oscillating system member, that improvement which comprises the steps of: sensing any occurrence of a rate of retardation of the rotatable member which exceeds a predetermined rate indicative of a tendency of the rotatable member to lock, responding to sensed excessive rates of retardation by imposing on the oscillating system member energy effecting initiation of displacement thereof from the central state in opposition to the bias exerted thereon, sensing initiation of return of the oscillating system member toward the central state, responding to sensed initiation of return by interrupting imposition of energy on the oscillating system member, and continuing periodic imposition of energy on the oscillating system member for so long as the rate of retardation of the rotatable member is excessive.
Claim 30
Dependent Claim
217 words
In a method of avoiding locking of a rotatable member braked by a fluid pressure brake which includes passing pressurized actuating fluid for the brake through a control valve, biasing a member of an oscillating system toward a central state while permitting displacement thereof in alternate directions from the central state, normally maintaining the valve in flow permitting condition in correlation with the central state of the oscillating system member, and interrupting braking of the rotatable member by changing the control valve to flow blocking and pressure releasing condition in correlation with displacement of the oscillating system member, that improvement which comprises the steps of: sensing any occurrence of a rate of retardation of the rotatable member which exceeds a predetermined rate indicative of a tendency of the rotatable member to lock, responding to sensed excessive rates of retardation by imposing on the oscillating system member energy effecting initiation of displacement thereof from the central state in opposition to the bias exerted thereon, sensing initiation of return of the oscillating system member toward the central state, responding to sensed initiation of return by interrupting imposition of energy on the oscillating system member, and continuing periodic imposition of energy on the oscillating system member for so long as the rate of retardation of the rotatable member is excessive.
Claim 31
Dependent Claim
226 words
In a method of avoiding locking of a rotatable member braked by a hydraulic pressure brake which includes passing hydraulic fluid which actuates the brake from a master cylinder through a control valve, bIasing a member of a mechanical oscillating system toward a central position while permitting displacement thereof in alternate directions from the central position, normally maintaining the valve in flow permitting condition while the oscillating system member is in the central position, and interrupting braking of the rotatable member by changing the control valve to flow blocking and pressure releasing condition as the oscillating system member is displaced from the central position, that improvement which comprises the steps of: sensing any occurrence of a rate of retardation of the rotatable member which exceeds a predetermined rate indicative of a tendency of the rotatable member to lock, responding to sensed excessive rates of retardation by exerting on the oscillating system member energy for effecting initiation of displacement thereof from the central position in position to the bias exerted thereon, sensing initiation of return of the oscillating system member toward the central position, responding to sensed initiation of return by interrupting the exertion of the force on the oscillating system member, and continuing periodic exertion of force on the oscillating system member for so long as the rate of retardation of the rotatable member is excessive.
Claim 32
Dependent Claim
226 words
In a method of avoiding locking of a rotatable member braked by a hydraulic pressure brake which includes passing hydraulic fluid which actuates the brake from a master cylinder through a control valve, bIasing a member of a mechanical oscillating system toward a central position while permitting displacement thereof in alternate directions from the central position, normally maintaining the valve in flow permitting condition while the oscillating system member is in the central position, and interrupting braking of the rotatable member by changing the control valve to flow blocking and pressure releasing condition as the oscillating system member is displaced from the central position, that improvement which comprises the steps of: sensing any occurrence of a rate of retardation of the rotatable member which exceeds a predetermined rate indicative of a tendency of the rotatable member to lock, responding to sensed excessive rates of retardation by exerting on the oscillating system member energy for effecting initiation of displacement thereof from the central position in position to the bias exerted thereon, sensing initiation of return of the oscillating system member toward the central position, responding to sensed initiation of return by interrupting the exertion of the force on the oscillating system member, and continuing periodic exertion of force on the oscillating system member for so long as the rate of retardation of the rotatable member is excessive.
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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |