US3617099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antispin device for motor vehicles
Assignee: Nissan Motor Co Ltd
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Filing: 1969-11-10
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Granted: 1971-11-02
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Expires: 1989-11-10
Abstract
Abstract An antispin device for use in combination with a braking system of a motor vehicle, having a spin detector unit and brakeactuating unit. The spin detecting unit detects the difference between the right and left driving wheels and delivers a voltage as soon as the difference exceeds a predetermined level and the brake-actuating unit responds to the voltage to actuate the wheel cylinder of the driving wheel rotating at a higher speed than the other.
Inventors
- 👤 Hiroshi Sugiyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:37
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/34; B60T8/48; B60T8/4809; B60T8/4827; B60T8/4863; B60T13/00; B60T13/10; B60T13/66; B60T13/72; B60T8/17; B60T8/175; B60T8/4818; B60T8/88; B60T8/885; B60T2201/00; B60T2201/14
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
345 words
An antispin device in combination with a braking system of a motor vehicle having a brake pedal, master cylinder operatively connected to the brake pedal and delivering a hydraulic pressure, and right and left wheel cylinders for actuating the brakes for the right and left driving wheels, respectively, with the hydraulic pressure supplied from the master cylinder, which device comprises spin detector means detecting a difference in the speeds of the right and left driving wheels and delivering a voltage as soon as the difference in the speeds exceeds a predetermined level, and means connected between the master cylinder and right and left wheel cylinders for passing said hydraulic pressure over to said wheel cylinders responsive to said voltage when applied thereto said spin detector means comprises a pair of sensors mounted on the right and left driving wheels for detecting the revolution speeds thereof and delivering pulses representing the said speeds, a pair of pulse shapers respectively connected to said sensors for determining the pulse widths of said pulses, a pair of speed detectors respectively connected to said pulse shapers for delivering voltages proportional to the respective speeds of the driving wheels in accordance with the pulses supplied from said pulse shapers, a speed difference detector connected to said speed detectors for delivering a voltage as it detects a difference between the voltages supplied from said speed detectors, a pair of SchMitt triggers connected to said speed difference detector and respectively associated with the right and left wheel cylinders, the voltage from said speed difference detector being selectively applied to either of said Schmitt triggers which is associated with one driving wheel rotating at a higher speed than the other, either of the Schmitt triggers thus delivering an output voltage as soon as the voltage supplied from said speed difference detector exceeds a predetermined level, a pair of gate circuits respectively connected to said Schmitt circuits for delivering output voltages when energized, and a pair of power amplifiers respectively connected to said gate circuits for amplifying the output voltages supplied from said gate circuits.
Claim 2
Dependent Claim
345 words
An antispin device in combination with a braking system of a motor vehicle having a brake pedal, master cylinder operatively connected to the brake pedal and delivering a hydraulic pressure, and right and left wheel cylinders for actuating the brakes for the right and left driving wheels, respectively, with the hydraulic pressure supplied from the master cylinder, which device comprises spin detector means detecting a difference in the speeds of the right and left driving wheels and delivering a voltage as soon as the difference in the speeds exceeds a predetermined level, and means connected between the master cylinder and right and left wheel cylinders for passing said hydraulic pressure over to said wheel cylinders responsive to said voltage when applied thereto said spin detector means comprises a pair of sensors mounted on the right and left driving wheels for detecting the revolution speeds thereof and delivering pulses representing the said speeds, a pair of pulse shapers respectively connected to said sensors for determining the pulse widths of said pulses, a pair of speed detectors respectively connected to said pulse shapers for delivering voltages proportional to the respective speeds of the driving wheels in accordance with the pulses supplied from said pulse shapers, a speed difference detector connected to said speed detectors for delivering a voltage as it detects a difference between the voltages supplied from said speed detectors, a pair of SchMitt triggers connected to said speed difference detector and respectively associated with the right and left wheel cylinders, the voltage from said speed difference detector being selectively applied to either of said Schmitt triggers which is associated with one driving wheel rotating at a higher speed than the other, either of the Schmitt triggers thus delivering an output voltage as soon as the voltage supplied from said speed difference detector exceeds a predetermined level, a pair of gate circuits respectively connected to said Schmitt circuits for delivering output voltages when energized, and a pair of power amplifiers respectively connected to said gate circuits for amplifying the output voltages supplied from said gate circuits.
Claim 3
Dependent Claim
189 words
A device according to claim 1, wherein said spin detector means further comprises an additional sensor mounted on either of the free wheels of the vehicle for detecting the revolution speed of the free wheel and delivering pulses representing the speed, a pulse shaper connected to said additional sensor for determining the pulse widths of said pulses, a free wheel speed detector connected to said pulse shaper for delivering a voltage proportional to the speed of the free wheel in accordance with the pulses supplied from said pulse shaper, a pair of speed comparators connected to said free wheel speed detector and said pair of speed detectors, said comparators being respectively connected at their outputs to said gate circuits, whereby, when an output voltage is absent at the output of either of said pair of speed detectors, the output voltage from said free wheel speed detector is compared with the output voltage from the other of said pair of speed detectors by either of said speed comparators for delivering an output voltage to either of said speed comparators for delivering an output voltage to either of said gate circuits.
Claim 4
Dependent Claim
35 words
A device according to claim 1, wherein said spin detector means is powered through an ignition switch except for said power amplifiers which are powered through an accelerator pedal switch coordinating with the accelerator pedal.
Claim 5
Dependent Claim
34 words
A device according to claim 3, wherein a pair of safety switches are respectively connected across said power amplifiers for disconnecting said power amplifiers from the power supply when a failure is invited therein.
Claim 6
Dependent Claim
90 words
A device according to claim 1, wherein the second named means comprises right and left brake actuators communicating with the master cylinder and right and left wheel cylinders, respectively, and each provided with a piston for regulating the hydraulic pressure to the be passed through the brake actuator, a pair of diaphragm assemblies each having a diaphragm member for controlling the movement of said piston, and a pair of solenoid valve assemblies responsive to said voltage supplied from said spin detector means for controlling the movement of said diaphragm member.
Claim 7
Dependent Claim
166 words
A device according to claim 5, wherein each of said brake actuators further comprises a generally cylindrical housing having provided in its wall an inlet communicating with the master cylinder and an outlet communicating with either of said wheel cylinders, said housing accommodating axially slidable therein said piston, a plunger axially movably mounted in said housing and extending outwardly through a sidewall of said housing opposite to said outlet, said plunger being rigidly secured at its outer end with said diaphragm member, a ball valve plunger axially slidably mounted said housing and connected at one end with said piston through a passage extending throughout the piston and connected releasably at the other with the first named plunger, a ball valve mounted in said passage of said piston, a spring mounted in said passage and forcing said ball against the inner end of said ball valve plunger, and a return spring mounted in said housing and behind said piston for forcing the piston away from said outlet.
Claim 8
Dependent Claim
198 words
A device according to claim 5, wherein each of said diAphragm assemblies further comprises first and second chambers isolated by said diaphragm member and a spring mounted in said first chamber for forcing said diaphragm member into a position to hold said plunger in a position remote from said outlet and wherein each of said solenoid valve assemblies comprises first and second chambers isolated from each other by a partition wall with a through hole formed therein, said first chamber communicating with said first and second chambers of said diaphragm assembly through first and second ports; a valve member mounted in said first chamber of said solenoid valve assembly; a spring mounted in said first chamber of said solenoid assembly and forcing said valve member against said partition wall to normally close said through hole; an air intake chamber communicating with said second chamber of said solenoid valve assembly and opened to the air through an air port, said air intake chamber having mounted therein a valve member forced by a spring away from said air port; a plunger movably extending through said second chamber of said solenoid valve assembly; and a solenoid coil actuating just said plunger.
Claim 9
Dependent Claim
27 words
A device according to claim 7, wherein said first chambers of said diaphragm assembly and said solenoid valve assembly communicates with the intake manifold of the engine.
Claim 10
Dependent Claim
20 words
A device according to claim 8, wherein said first chambers communicate with the intake manifold through a one-way check valve.
Claim 11
Dependent Claim
20 words
A device according to claim 7, wherein said air intake chamber is opened to the air through an air filter.
Claim 12
Dependent Claim
46 words
A device according to claim 7, wherein said air intake chamber communicates with an air reservoir to which air under pressure is supplied from an air compressor and wherein said first chambers of said diaphragm assembly and said solenoid valve assembly are opened to the atmosphere.
Claim 13
Dependent Claim
20 words
A device according to claim 11, wherein a one-way check valve is provided between said air reservoir and air compressor.
Claim 14
Dependent Claim
345 words
an antispin device in combination with a pneumatic braking system of a motor vehicle having an air compressor, an air reservoir communicating with the air compressor to store therein compressed air supplied from the air compressor, a brake valve communicating at its inlet port with the air reservoir, and a relay valve communicating at its inlet port with the brake valve and at its one outlet port with the right and left brake chambers of the right and left driving wheels, respectively, for passing the compressed air in the air reservoir over to the brake chambers when the brake valve is opened, which device comprises spin detector means detecting a difference between the speeds of the right and left driving wheels and delivering a voltage as soon as the difference in said speeds exceeds a predetermined level and means responsive to said voltage to pass the compressed air in the air reservoir selectively to either of the right and left brake chambers as soon as said voltage is applied thereto, the second named means comprises a pair of pressure control valves each having a first and second chambers isolated from each other by a partition wall with a through hole formed therein, a valve member mounted in said second chamber, a spring mounted in said second chamber to force said valve member against said partition wall for normally keeping said through hole closed, a plunger movably extending through said first chamber, and a solenoid coil connected to said spin detector means for actuating said plunger responsive to said voltage, the first chambers of said pair of pressure control valves communicating with each other through a pressure governor and the second chambers of said pair of pressure control valves communicating at their inlet ports with said relay valve and at their outlet ports with said right and left brake chambers, said pressure governor communicating at its inlet port with said air reservoir and with the other inlet port of said relay valve and having a valve member normally forced toward sAid inlet of said pressure governor.
Claim 15
Dependent Claim
345 words
an antispin device in combination with a pneumatic braking system of a motor vehicle having an air compressor, an air reservoir communicating with the air compressor to store therein compressed air supplied from the air compressor, a brake valve communicating at its inlet port with the air reservoir, and a relay valve communicating at its inlet port with the brake valve and at its one outlet port with the right and left brake chambers of the right and left driving wheels, respectively, for passing the compressed air in the air reservoir over to the brake chambers when the brake valve is opened, which device comprises spin detector means detecting a difference between the speeds of the right and left driving wheels and delivering a voltage as soon as the difference in said speeds exceeds a predetermined level and means responsive to said voltage to pass the compressed air in the air reservoir selectively to either of the right and left brake chambers as soon as said voltage is applied thereto, the second named means comprises a pair of pressure control valves each having a first and second chambers isolated from each other by a partition wall with a through hole formed therein, a valve member mounted in said second chamber, a spring mounted in said second chamber to force said valve member against said partition wall for normally keeping said through hole closed, a plunger movably extending through said first chamber, and a solenoid coil connected to said spin detector means for actuating said plunger responsive to said voltage, the first chambers of said pair of pressure control valves communicating with each other through a pressure governor and the second chambers of said pair of pressure control valves communicating at their inlet ports with said relay valve and at their outlet ports with said right and left brake chambers, said pressure governor communicating at its inlet port with said air reservoir and with the other inlet port of said relay valve and having a valve member normally forced toward sAid inlet of said pressure governor.
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) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |