US3830550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-skid brake control system for vehicles
Assignee: Aisin Corp
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Filing: 1972-11-03
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Granted: 1974-08-20
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Expires: 1992-11-03
Abstract
Abstract An improved anti-skid brake control system of the type comprising a cut-off valve and a hydraulic capacity controller disposed within a hydraulic braking circuit connecting a master cylinder with wheel brake cylinders, wherein in an anti-skid operation, the cut-off valve first blocks passage of pressurized fluid from the master cylinder to the wheel brake cylinders, and then the capacity controller is conditioned for its pressure decreasing operation for effecting the anti-skid operation. The cut-off valve and the capacity controller are integrally mounted within one housing to be compact in size. Furthermore, the correlative operation between the cut-off valve and the capacity controller can easily be adjusted to the most desirable condition by way of the axial adjustment of a plynger of the capacity controller.
Inventors
- 👤 T Kondo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:12
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/34; B60T8/42; B60T8/4208; B60T8/4225; B60T8/4241; B60T8/425
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
355 words
In an anti-skid control system for a vehicle having a master cylinder, wheel brake cylinders and a hydraulic braking circuit connecting said master cylinder with said wheel cylinders, skidsensing means for generating first and second signals therefrom in response to predetermined wheel locking conditions, and servo means including a diaphragm piston pneumatically operated in response to said signals generated from said skid-sensing means, the improvement comprising a hydraulic controller housing having a first fluid chamber connected with said master cylinder and a second fluid chamber in communication with said wheel cylinders, ball valve means disposed within said first fluid chamber for selectively blocking the pressure communication between said first and second fluid chambers, and hydraulic capacity control means including a plunger slidable within said second fluid chamber of said housing and operatively engaged with said ball valve means and said diaphragm piston at its both ends respectively, said plunger being operated by said diaphragm piston to activate said ball valve means and thereafter to control the capacity of said second fluid chamber to decrease the pressure of pressurized fluid supplied to said wheel cylinders, wherein said ball valve means comprises a ball valve for selectively blocking the pressure communication between said first and second fluid chambers and a piston to regulate the blocking operation of said ball valve, said piston being separably engaged with one end of said plunger so that said piston is normally conditioned to a predetermined valve-opening position by said plunger, and wherein said ball valve means further comprises a piston guide installed within said first fluid chamber, said piston guide being provided with a guiding hole therein to receive said piston for its reciprocation and being formed with a valve seat thereon, a ball confined within said first fluid chamber and arranged to Seat on said valve seat in response with the reciprocation movement of said piston, a retainer for supporting said ball, a spring biasing said ball and retainer toward said piston, and a plug threaded over said piston guide and in said controller housing to form said first fluid chamber and to regulate the biasing force of said spring.
Claim 2
Dependent Claim
355 words
In an anti-skid control system for a vehicle having a master cylinder, wheel brake cylinders and a hydraulic braking circuit connecting said master cylinder with said wheel cylinders, skidsensing means for generating first and second signals therefrom in response to predetermined wheel locking conditions, and servo means including a diaphragm piston pneumatically operated in response to said signals generated from said skid-sensing means, the improvement comprising a hydraulic controller housing having a first fluid chamber connected with said master cylinder and a second fluid chamber in communication with said wheel cylinders, ball valve means disposed within said first fluid chamber for selectively blocking the pressure communication between said first and second fluid chambers, and hydraulic capacity control means including a plunger slidable within said second fluid chamber of said housing and operatively engaged with said ball valve means and said diaphragm piston at its both ends respectively, said plunger being operated by said diaphragm piston to activate said ball valve means and thereafter to control the capacity of said second fluid chamber to decrease the pressure of pressurized fluid supplied to said wheel cylinders, wherein said ball valve means comprises a ball valve for selectively blocking the pressure communication between said first and second fluid chambers and a piston to regulate the blocking operation of said ball valve, said piston being separably engaged with one end of said plunger so that said piston is normally conditioned to a predetermined valve-opening position by said plunger, and wherein said ball valve means further comprises a piston guide installed within said first fluid chamber, said piston guide being provided with a guiding hole therein to receive said piston for its reciprocation and being formed with a valve seat thereon, a ball confined within said first fluid chamber and arranged to Seat on said valve seat in response with the reciprocation movement of said piston, a retainer for supporting said ball, a spring biasing said ball and retainer toward said piston, and a plug threaded over said piston guide and in said controller housing to form said first fluid chamber and to regulate the biasing force of said spring.
Claim 3
Dependent Claim
42 words
The improvement in an anti-skid brake control system as set forth in claim 1, wherein said second fluid chamber includes a capacity control chamber for decreasing the pressurized fluid supplied to said wheel cylinders in response to the operation of said plunger.
Claim 4
Dependent Claim
141 words
The improvement in an anti-skid brake control system as set forth in claim 1, wherein is additionally provided adjusting means for axially regulating the engaging position between said plunger and said piston so as to determine said predetermined valve-opening position of said piston for said ball valve means, wherein is provided means connecting the other end of said plunger to said diaphragm piston with a predetermined axial clearance for sliding movement of the plunger, said adjusting means comprising an adjusting screw threaded to a portion of said diaphragm piston and in axial alignment with the plunger, a locking nut to hold said screw, a stopper pin passing through a portion of said diaphragm piston and a diametrical slot in the plunger, said slot being larger than said pin thereby defining the axial clearance displacement between said plunger and said diaphragm piston.
Claim 5
Dependent Claim
312 words
In an anti-skid control system for a vehicle having a master cylinder, wheel brake cylinders and a hydraulic braking circuit connecting said master cylinder with said wheel cylinders, skid-sensing means for generating first and second signals therefrom in response to predetermined wheel locking conditions, and servo means including a diaphragm piston pneumatically operated in response to said signals generated from said skid-sensing means, the improvement comprising an hydraulic controller housing having a first fluid chamber connected with said master cylinder and a second fluid chamber in communication with said wheel cylinders, cut-off valve means disposed within said first fluid chamber for selectively blocking the pressure communication between said first and second chambers, and hydraulic capacity control means including a plunger slidable within said second fluid chamber of said housing and operatively engaged with said cut-off valve means and said diaphragm piston at its both ends respectively, said plunger being operated by said diaphragm piston to activate said cut-off valve means and thereafter to control the capacity of said second fluid chamber to decrease the pressure of pressurized fluid supplied to said wheel cylinders, wherein said cut-off valve means comprises a valve for selectively blocking the pressure communication between said first and second fluid chambers and a piston to regulate the blocking operation of said valve, said piston being separably engaged with one end of said plunger so that said piston is normally conditioned to a predetermined valve-opening position by said plunger, and wherein is provided means connecting the other end of said plunger to said diaphragm piston with a predetermined axial clearance for sliding movement of the plunger, said means connecting the plunger including a stopper pin passing through a portion of said diaphragm piston and a diametrical slot in the plunger, said slot being larger than said pin thereby defining the axial clearance displacement between said plunger and said diaphgram piston.
Claim 6
Dependent Claim
312 words
In an anti-skid control system for a vehicle having a master cylinder, wheel brake cylinders and a hydraulic braking circuit connecting said master cylinder with said wheel cylinders, skid-sensing means for generating first and second signals therefrom in response to predetermined wheel locking conditions, and servo means including a diaphragm piston pneumatically operated in response to said signals generated from said skid-sensing means, the improvement comprising an hydraulic controller housing having a first fluid chamber connected with said master cylinder and a second fluid chamber in communication with said wheel cylinders, cut-off valve means disposed within said first fluid chamber for selectively blocking the pressure communication between said first and second chambers, and hydraulic capacity control means including a plunger slidable within said second fluid chamber of said housing and operatively engaged with said cut-off valve means and said diaphragm piston at its both ends respectively, said plunger being operated by said diaphragm piston to activate said cut-off valve means and thereafter to control the capacity of said second fluid chamber to decrease the pressure of pressurized fluid supplied to said wheel cylinders, wherein said cut-off valve means comprises a valve for selectively blocking the pressure communication between said first and second fluid chambers and a piston to regulate the blocking operation of said valve, said piston being separably engaged with one end of said plunger so that said piston is normally conditioned to a predetermined valve-opening position by said plunger, and wherein is provided means connecting the other end of said plunger to said diaphragm piston with a predetermined axial clearance for sliding movement of the plunger, said means connecting the plunger including a stopper pin passing through a portion of said diaphragm piston and a diametrical slot in the plunger, said slot being larger than said pin thereby defining the axial clearance displacement between said plunger and said diaphgram piston.
Claim 7
Dependent Claim
48 words
The improvement in an anti-skid brake control system as set forth in claim 4, wherein is additionally provided adjusting means for axially regulating the engaging position between said plunger and said piston so as to determine said predetermined valve-opening position of said piston for said cut-off valve means.
Claim 8
Dependent Claim
45 words
The improvement in an anti-skid brake control system as set forth in claim 5, wherein said adjusting meAns comprises an adjusting screw threaded to a portion of said diaphragm piston and in axial alignment with the plunger, and a locking nut to hold said screw.
Claim 9
Dependent Claim
39 words
The improvement in an anti-skid brake control system as set forth in claim 5, wherein said valve for selectively blocking the pressure communication between said first and second chambers is a ball valve which is controlled by said piston.
Claim 10
Dependent Claim
295 words
In an anti-skid control system for a vehicle having a master cylinder, wheel brake cylinders and a hydraulic braking circuit connecting said master cylinder with said wheel cylinders, skid-sensing means for generating first and second signals therefrom in response to predetermined wheel locking conditions, and servo means including a diaphragm piston pneumatically operated in response to said signals generated from said skid-sensing means, the improvement comprising a hydraulic controller housing having a first fluid chamber connected with said master cylinder and a second fluid chamber in communication with said wheel cylinders, cut-off valve means disposed within said first fluid chamber for selectively blocking the pressure communication between said first and second fluid chambers, and hydraulic capacity control means including a plunger slidable within said second fluid chamber of said housing and operatively engaged with said cut-off valve means and said diaphragm piston at its both ends respectively, said plunger being operated by said diaphragm piston to activate said cut-off valve means and thereafter to control the capacity of said second fluid chamber to decrease the pressure of pressurized fluid supplied to said wheel cylinders, wherein said servo means includes first and second pneumatic chambers formed on one side of said diaphragm piston and a third pneumatic chamber formed on the other side of said diaphragm piston, said first and third pneumatic chambers being normally in communication with a vacuum source and said second chamber being constantly in communication with atmospheric pressure, and a pneumatic selector valve means electrically operated by said first signal from said skid-sensing means to connect said third pneumatic chamber with atmospheric pressure to activate said diaphragm piston, whereby said plunger is retracted by said diaphragm piston aided by braking pressure produced within said second fluid chamber of said hydraulic controller housing.
Claim 11
Dependent Claim
295 words
In an anti-skid control system for a vehicle having a master cylinder, wheel brake cylinders and a hydraulic braking circuit connecting said master cylinder with said wheel cylinders, skid-sensing means for generating first and second signals therefrom in response to predetermined wheel locking conditions, and servo means including a diaphragm piston pneumatically operated in response to said signals generated from said skid-sensing means, the improvement comprising a hydraulic controller housing having a first fluid chamber connected with said master cylinder and a second fluid chamber in communication with said wheel cylinders, cut-off valve means disposed within said first fluid chamber for selectively blocking the pressure communication between said first and second fluid chambers, and hydraulic capacity control means including a plunger slidable within said second fluid chamber of said housing and operatively engaged with said cut-off valve means and said diaphragm piston at its both ends respectively, said plunger being operated by said diaphragm piston to activate said cut-off valve means and thereafter to control the capacity of said second fluid chamber to decrease the pressure of pressurized fluid supplied to said wheel cylinders, wherein said servo means includes first and second pneumatic chambers formed on one side of said diaphragm piston and a third pneumatic chamber formed on the other side of said diaphragm piston, said first and third pneumatic chambers being normally in communication with a vacuum source and said second chamber being constantly in communication with atmospheric pressure, and a pneumatic selector valve means electrically operated by said first signal from said skid-sensing means to connect said third pneumatic chamber with atmospheric pressure to activate said diaphragm piston, whereby said plunger is retracted by said diaphragm piston aided by braking pressure produced within said second fluid chamber of said hydraulic controller housing.
Claim 12
Dependent Claim
69 words
The improvement in an anti-skid brake control system as set forth in claim 8, wherein said servo means further includes second pneumatic selector valve means electrically operated by said second signal from said skidsensing means for connecting said third pneumatic chamber with atmospheric pressure during the activation of said first selector valve means so as to provide additional pneumatic communication between said third pneumatic chamber and the atmospheric pressure.
Claim 13
Dependent Claim
59 words
The improvement in an anti-skid brake control system as set forth in claim 8, wherein said plunger includes adjusting means for determining the pre-set axial position of said plunger with respect to an assembled condition of said cut-off valve means, said adjusting means being provided adjacent the end portion of the plunger which is engaged by said diaphragm piston.
Claim 14
Dependent Claim
73 words
The improvement in an anti-skid brake control system as set forth in claim 10, wherein said servo means includes a second diaphragm piston, said two diaphragm pistons defining three pneumatic chambers, said servo means including the second diaphragm piston and two of said chambers being removably attached to said first diaphragm piston and said controller housing, whereby upon removal of said servo means access is had to said adjusting means for said plunger.
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) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |