US3854501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antilock brake system and control valve therefor
Assignee: Echlin Inc
•
Filing: 1973-06-14
•
Granted: 1974-12-17
•
Expires: 1993-06-14
Abstract
Abstract A control valve for an antilock brake system is provided with a housing, and means movable in the housing in response to control fluid pressure applied thereto between an inoperative position and an operative position effecting the application through the housing of fluid pressure supplied thereto. Other means are also movable in the housing to a position predeterminately restricting the applied flow of control fluid pressure to the first-named movable means upon the movement thereof to its operative position. Also disclosed is a control valve for an antilock brake system having a housing with a chamber therein for control fluid pressure in which relay means is movable in response to the control fluid pressure to effect the application through the housing of fluid pressure supplied thereto. A pair of flow passages is provided in the housing through which the control fluid pressure is applied to the chamber and a pair of solenoid means controls the flow of the control fluid pressure through the flow passages, at least one of the solenoid means also being operable for venting the control fluid pressure from the chamber. An antilock brake system is also disclosed along with a method of cyclically applying and exhausting fluid pressure to and from a brake.
Inventors
- 👤 J Machek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:35
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/34; B60T8/36; B60T8/361; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7847; Y10T137/7848; Y10T137/8593; Y10T137/86919
Claims Analysis
Total Claims: 49
Claim 1
Independent Claim
105 words
A control valve for an antilock brake system comprising a housing, means movable in said housing in response to control fluid pressure applied thereto between an inoperative position and an operative position for effecting the application through said housing of fluid pressure supplied thereto; and other means movable in said housing to a position predeterminately restricting the applied flow of control fluid pressure to said first named means upon movement thereof to its operative position, said other means comprises means for engagement with said first named means in its inoperative position thereby to urge said other means to a substantially non-restricting position in said housing.
Claim 2
Dependent Claim
105 words
A control valve for an antilock brake system comprising a housing, means movable in said housing in response to control fluid pressure applied thereto between an inoperative position and an operative position for effecting the application through said housing of fluid pressure supplied thereto; and other means movable in said housing to a position predeterminately restricting the applied flow of control fluid pressure to said first named means upon movement thereof to its operative position, said other means comprises means for engagement with said first named means in its inoperative position thereby to urge said other means to a substantially non-restricting position in said housing.
Claim 3
Dependent Claim
46 words
A control valve according to claim 1, further comprising means in said housing constituting an orifice through which the applied flow of control fluid pressure passes to said first named means, said other means being movable within said orifice between its flow restricting and non-restricting positions.
Claim 4
Dependent Claim
42 words
A control valve according to claim 2, wherein said other means further comprises abutment means for engagement with said housing adjacent said orifice thereby to maintain said other means within the orifice when said other means is in its flow restricting position.
Claim 5
Dependent Claim
54 words
A control valve according to claim 3, wherein said first named means and other means are initially conjointly movable toward their respective operative and flow restricting positions, and said first named means being further movable to its operative position independently of said other means upon the engagement of said engagement means with said housing.
Claim 6
Dependent Claim
43 words
A control valve according to claim 4, wherein passage through said orifice of the applied flow of control fluid pressure to said first named means during the initial conjoint movement thereof with said other means substantially clears said orifice of clogging foreign particles.
Claim 7
Dependent Claim
57 words
A control valve according to claim 2, wherein said other means further comprises an orifice plunger having a pair of stepped extensions sized for movement within said orifice, the larger stepped extension extending at least partially into said orifice thereby to reduce th effective flow area thereof when the orifice plunger is in the flow restricting position.
Claim 8
Dependent Claim
25 words
A control valve according to claim 6, wherein the smaller stepped extension extends through said orifice when said orifice plunger is in its nonrestricting position.
Claim 9
Dependent Claim
17 words
A control valve according to claim 7, wherein at least the larger stepped extension is generally cylindric.
Claim 10
Dependent Claim
20 words
A control valve according to claim 7, wherein said engagement means constitutes the free end of said smaller stepped extension.
Claim 11
Dependent Claim
57 words
A control valve according to claim 9, wherein said other means further comprises abutment means on the other end of said orifice plunger adjacent said larger stepped extension and engageable with said housing adjacent said orifice thereby to maintain said orifice plunger against displacement through said orifice when said other means is in its flow restricting position.
Claim 12
Dependent Claim
50 words
A control valve according to claim 10, further comprising passage means in said housing substantially axially aligned with and larger than said orifice, and a shoulder between said passage means and orifice, said abutment means being engaged with said shoulder when said other means is in its flow restricting position.
Claim 13
Dependent Claim
29 words
A control valve according to claim 11, wherein said other means further comprises guide means on the other end of said orifice plunger for sliding engagement with said passage.
Claim 14
Dependent Claim
100 words
A control valve for an antilock brake system comprising a housing, a chamber in saId housing for control fluid pressure, relay means movable in said chamber in response to control fluid pressure therein for effecting the application through said housing of fluid pressure supplied thereto; a pair of flow passages in said housing connecting with said chamber through which control fluid pressure is applied, a pair of solenoid means for controlling the flow of control fluid pressure through said flow passages, and at least one of said solenoid means also being operable for venting control fluid pressure from said chamber.
Claim 15
Dependent Claim
100 words
A control valve for an antilock brake system comprising a housing, a chamber in saId housing for control fluid pressure, relay means movable in said chamber in response to control fluid pressure therein for effecting the application through said housing of fluid pressure supplied thereto; a pair of flow passages in said housing connecting with said chamber through which control fluid pressure is applied, a pair of solenoid means for controlling the flow of control fluid pressure through said flow passages, and at least one of said solenoid means also being operable for venting control fluid pressure from said chamber.
Claim 16
Dependent Claim
31 words
A control valve according to claim 13, wherein said one solenoid means is energized to close one of said flow passages and vent control fluid pressure from said chamber to atmosphere.
Claim 17
Dependent Claim
24 words
A control valve according to claim 14, wherein the other of said solenoid means is energized to close the other of said flow passages.
Claim 18
Dependent Claim
23 words
A control valve according to claim 15, wherein one of said one and other solenoid means is energized prior to the other thereof.
Claim 19
Dependent Claim
32 words
A control valve according to claim 15, wherein said solenoid means are energized substantially simultaneously thereby to isolate the control fluid pressure in said chamber and vent the isolated control fluid pressure.
Claim 20
Dependent Claim
78 words
A control valve according to claim 13, wherein said relay means is movable in response to control fluid pressure in said chamber between an inoperative position and an operative position for effecting the application through said housing of the fluid pressure supplied thereto, and means movable in said one flow passage to a position predeterminately restricting the applied flow of control fluid pressure therethrough to said chamber upon the movement of said relay means to its operative position.
Claim 21
Dependent Claim
38 words
A control valve according to claim 18, said movable means comprising means for engagement with said relay means in its inoperative position thereby to urge said movable means to a substantially non-restricting position in said one flow passage.
Claim 22
Dependent Claim
45 words
A control valve according to claim 19, comprising means in said one flow passage constituting an orifice through which the applied flow of control fluid pressure passes to said chamber, said movable means being movable within said orifice between its flow restricting and non-restricting positions.
Claim 23
Dependent Claim
41 words
A control valve according to claim 20, said movable means further comprising abutment means for engagement with said housing adjacent said orifice thereby to maintain said movable means within the orifice when said movable means is in its flow restricting position.
Claim 24
Dependent Claim
52 words
A control valve according to claim 21, wherein said relay means and movable means are initially conjointly movable toward their respective operative and flow restricting positions, and said relay means being further movable to its operative position independently of said movable means upon the engagement of said engagement means with said housing.
Claim 25
Dependent Claim
45 words
A control valve according to claim 22, wherein the passage through said orifice of the applied flow of control fluid pressure to said chamber during the initial conjoint movement of said relay means with said movable means substantially clears said orifice of clogging foreign particles.
Claim 26
Dependent Claim
56 words
A control valve according to claim 20, said movable means further comprising an orifice plunger having a pair of stepped extensions sized for movement within said orifice, the large stepped extension extending at least partially into said orifice thereby to reduce the effective flow area thereof when said movable means is in its flow restricting position.
Claim 27
Dependent Claim
25 words
A control valve according to claim 24, wherein the smaller stepped extension extends through said orifice when said movable means is in its nonrestricting position.
Claim 28
Dependent Claim
17 words
A control valve according to claim 25, wherein at least the larger stepped extension is generally cylindric.
Claim 29
Dependent Claim
20 words
A control valve according to claim 25, wherein said engagement means constitutes the free end of said smaller stepped extension.
Claim 30
Dependent Claim
56 words
A control valve aCcording to claim 27, said movable means further comprising abutment means on the other end of said orifice plunger adjacent said larger stepped extension and engageable with said housing adjacent said orifice thereby to maintain said orifice plunger against displacement through said orifice when said movable means is in its flow restricting position.
Claim 31
Dependent Claim
55 words
A control valve according to claim 28, wherein at least a portion of said one flow passage is substantially axially aligned with and larger than said orifice, and a shoulder between said one flow passage and orifice, said abutment means being engaged with said shoulder when said movable means is in its flow restricting position.
Claim 32
Dependent Claim
30 words
A control valve according to claim 29, said movable means further comprising guide means on the other end of said orifice plunger for sliding engagement with said one flow passage.
Claim 33
Dependent Claim
40 words
A control valve according to claim 13, wherein said solenoid means comprise a pair of valve means for controlling said flow passages, said valve means being movable to position closing said flow passages upon energization of said solenoid means, respectively.
Claim 34
Dependent Claim
35 words
A control valve according to claim 31, wherein said one solenoid means constitutes at least a portion of exhaust passage means for the venting flow therethrough of control fluid pressure and communicating with said chamber.
Claim 35
Dependent Claim
73 words
A control valve according to claim 32, wherein one solenoid means further comprises exhaust valve means for controlling said exhaust passage means and conjointly movable with one of said first named valve means, said exhaust valve means being movable to a position opening said exhaust passage means and said one first named valve means being conjointly movable therewith to close one of said flow passages upon the energization of said one solenoid means.
Claim 36
Dependent Claim
66 words
A control valve according to claim 33, further comprising an exhaust valve seat in said housing about said exhaust passage means for engagement with said exhaust valve means, said exhaust valve means being movable to a position disengaged from said exhaust valve seat thereby to open said exhaust passage means and vent control fluid pressure from said chamber upon the energization of said one solenoid means.
Claim 37
Dependent Claim
51 words
A control valve according to claim 34, further comprising a pair of other valve seats in said housing about said flow passages for engagement with said first named valve means, said first named valve means being respectively actuated into engagement with said other valve seats upon energization of said solenoid means.
Claim 38
Dependent Claim
55 words
A control valve according to claim 35, wherein said solenoid means further comprise a pair of pole pieces supported in said housing, means in one of said pole pieces constituting at least a portion of said exhaust passage means, and said exhaust valve seat being on said one pole piece about said exhaust passage means.
Claim 39
Dependent Claim
62 words
A control valve according to claim 36, wherein said solenoid means further comprise a pair of valve stems movable in said pole pieces, and said exhaust valve means and one of said first named valve means being carried on one of said valve stems and the other of said first named valve means being carried on the other of said valve stems.
Claim 40
Dependent Claim
27 words
A control valve according to claim 37, wherein said other valve means is carried on said one valve stem adjacent and opposite to said exhaust valve means.
Claim 41
Dependent Claim
116 words
A control valve according to claim 38, wherein said solenoid means further comprise a pair of coil means extending about at least a portion of said pole pieces, and armature means movable in said coil means for driving engagement with said valve stems, said armature means being movable into magnetic holding engagement with said pole pieces upon energization of said solenoid means thereby to excite said coil means, and the movement of said armature means also driving said valve stems to conjointly actuate said exhaust valve means and said one first named valve means carried on said one valve stem and also to actuaTe said other first named valve means carried on said other valve stem.
Claim 42
Dependent Claim
31 words
A control valve according to claim 39, wherein one of said one solenoid means and the other of said solenoid means is energized prior to the energization of the other thereof.
Claim 43
Dependent Claim
30 words
A control valve according to claim 39, wherein said solenoid means are energized substantially simultaneously thereby to isolate the control fluid pressure in said chamber and vent it to atmosphere.
Claim 44
Dependent Claim
49 words
A control valve according to claim 39, wherein the other of said solenoid means is also operable for venting control fluid pressure from said chamber, said other solenoid means being energized to close the other of said flow passage and vent control fluid pressure from said chamber to atmosphere.
Claim 45
Dependent Claim
23 words
A control valve according to claim 42, wherein one of said one and other solenoid means is energized prior to the other thereof.
Claim 46
Dependent Claim
15 words
A control valve according to claim 42, wherein said solenoid means are energized substantially simultaneously.
Claim 47
Dependent Claim
42 words
A control valve according to claim 13, further comprising chamber means in said housing in which said solenoid means are disposed, said chamber means extending generally in a plane which intersects that in which the axis of said relay means is disposed.
Claim 48
Dependent Claim
147 words
A control valve for an antilock brake system comprising a housing, a chamber in said housing for control fluid pressure, relay means movable in said housing in response to control fluid pressure therein from an inoperative position to an operative position for effecting the application through said housing of fluid pressure supplied thereto, a pair of flow passages in said housing communicating with said chamber through which control fluid pressure is applied a pair of solenoid means in said housing for respectively venting control fluid pressure from said chamber, one of said solenoid means also controlling passage of control fluid pressure through one of said flow passages to said chamber, and means movable in the other of said flow passages to a position predeterminately restricting the applied flow of control fluid pressure therethrough to said chamber upon the movement of said relay means to its operative position.
Claim 49
Dependent Claim
147 words
A control valve for an antilock brake system comprising a housing, a chamber in said housing for control fluid pressure, relay means movable in said housing in response to control fluid pressure therein from an inoperative position to an operative position for effecting the application through said housing of fluid pressure supplied thereto, a pair of flow passages in said housing communicating with said chamber through which control fluid pressure is applied a pair of solenoid means in said housing for respectively venting control fluid pressure from said chamber, one of said solenoid means also controlling passage of control fluid pressure through one of said flow passages to said chamber, and means movable in the other of said flow passages to a position predeterminately restricting the applied flow of control fluid pressure therethrough to said chamber upon the movement of said relay means to its operative position.
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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) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |