Patent US4723638A successfully refreshed from Google Patents.
US4723638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wheel angular acceleration sensor for a vehicle antilock control device
Assignee: Honda Motor Co Ltd
•
Filing: 1986-12-19
•
Granted: 1988-02-09
•
Expires: 2006-12-19
Abstract
Abstract A wheel angular acceleration sensor for a vehicle anti-lock control device wherein the tendency of the wheel going toward a locked state resulting from an excessively great braking force of the brake applied thereto is detected by overrun rotation of the flywheel and the overrun rotation is converted into an axial displacement of the flywheel by the cam mechanism to output it as a signal for controlling the braking force, the sensor having an aligning mechanism interposed between an output shaft rotated in association with the wheel and the cam mechanism as well as a friction clutch plate for allowing the overrun rotation of the flywheel, whereby when a deflected load is exerted on the cam mechanism or the friction clutch plate due to an error in machining or the like at the time of occurrence of a thrust at the cam mechanism, the aligning mechanism works to overcome the deflected load, allowing the flywheel to displace smoothly and accurately in the axial direction.
Inventors
- 👤 Tetsuo Tsuchida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:46
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/72; B60T8/74
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
258 words
A wheel angular acceleration sensor for a vehicle anti-lock control device comprising an output shaft rotated in association with a wheel braked by a wheel brake, a flywheel rotatably and slidably supported on the output shaft, a friction clutch plate which is interposed between the output shaft and the flywheel and normally transmits a driving torque of the output shaft to the flywheel, the clutch plate allowing overrun rotation of the flywheel when the wheel is about to lock at braking, and a cam mechanism interposed in series with said friction clutch plate between said output shaft and said flywheel so as to be responsive to the overrun rotation of the flywheel to impart axial displacement to the flywheel, said axial displacement of the flywheel being outputted as a control signal for a braking force of the wheel brake, wherein between the output shaft and the friction clutch plate is interposed an aligning plate for connecting the output shaft and the friction clutch plate in a rotating direction, said aligning plate having opposite sides and being provided at one side with a pair of first fulcrum projections placed in abutment with the output shaft to enable titling motion of said aligning plate around a first axis perpendicularly crossing an axis of the output shaft and at the other side with a pair of second fulcrum projections in abutment with the friction clutch plate to enable tilting motion of said aligning plate around a second axis perpendicularly crossing both the axis of the output shaft and the first axis.
Claim 2
Dependent Claim
258 words
A wheel angular acceleration sensor for a vehicle anti-lock control device comprising an output shaft rotated in association with a wheel braked by a wheel brake, a flywheel rotatably and slidably supported on the output shaft, a friction clutch plate which is interposed between the output shaft and the flywheel and normally transmits a driving torque of the output shaft to the flywheel, the clutch plate allowing overrun rotation of the flywheel when the wheel is about to lock at braking, and a cam mechanism interposed in series with said friction clutch plate between said output shaft and said flywheel so as to be responsive to the overrun rotation of the flywheel to impart axial displacement to the flywheel, said axial displacement of the flywheel being outputted as a control signal for a braking force of the wheel brake, wherein between the output shaft and the friction clutch plate is interposed an aligning plate for connecting the output shaft and the friction clutch plate in a rotating direction, said aligning plate having opposite sides and being provided at one side with a pair of first fulcrum projections placed in abutment with the output shaft to enable titling motion of said aligning plate around a first axis perpendicularly crossing an axis of the output shaft and at the other side with a pair of second fulcrum projections in abutment with the friction clutch plate to enable tilting motion of said aligning plate around a second axis perpendicularly crossing both the axis of the output shaft and the first axis.
Claim 3
Dependent Claim
60 words
The wheel angular acceleration sensor according to claim 1, wherein transmission pawls and notches, which are engaged with each other, are provided in the aligning plate and the output shaft, and in the aligning plate and the frcition clutch plate in order to connect the aligning plate to the output shaft and the friction clutch plate in the rotating direction.
Claim 4
Dependent Claim
32 words
The wheel angular acceleration sensor according to claim 1, wherein said output shaft has a flange integral therewith, said flange extending radially and opposing to the one side of said aligning plate.
Claim 5
Dependent Claim
38 words
The wheel angular acceleration sensor according to claim 1, wherein between said aligning plate and said output shaft, and between said aligning plate and said friction clutch plate, means for connecting them in the rotating direction are provided.
Claim 6
Dependent Claim
54 words
The wheel angular acceleration sensor according to claim 4, wherein each of said first fulcrum projections is projected radially from the aligning plate and engaged with an axial recessed groove provided on said output shaft, said first fulcrum projection being used also as said conencting means between the aligning plate and the output shaft.
Claim 7
Dependent Claim
34 words
The wheel angular acceleration sensor according to claim 5, wherein said output shaft is provided with means for limiting axial movement of the first fulcrum projection of said aligning plate in the recessed groove.
Claim 8
Dependent Claim
24 words
The wheel angular acceleration sensor according to claim 1, wherein a slide type ball bearing is interposed between said output shaft and said flywheel.
Claim 9
Dependent Claim
64 words
The wheel angular acceleration sensor according to claim 1, wherein between said wheel and an input member for transmitting the rotation of said wheel to said output shaft is interposed a coupling for connecting said wheel and input member in the rotational direction and for preventing transmission of a rotating torque in excess of a predetermined value from the wheel to the input member.
Claim 10
Dependent Claim
66 words
The wheel angular acceleration sensor according to claim 8, wherein said coupling has a convex portion provided on one of the wheel and the input member and a concave portion provided on the other and brought into resilient engagement with said convex portion, said convex portion and said concave portion being disconnected from each other by the action of torque in excess of said predetermined value.
Claim 11
Dependent Claim
69 words
The wheel angular acceleration sensor according to claim 8, wherein said coupling comprises a coupling plate provided on one of the wheel and the input member and formed with a plurality of engaging holes on a circumference, and a plurality of coupling pins implanted to the other and being fitted in said engaging holes, said coupling pins being sheared upon receipt of torque in excess of said predetermined value.
Claim 12
Dependent Claim
32 words
The wheel angular acceleration sensor according to claim 2, wherein said output shaft has a flange integral therewith, said flange extending radially and opposing to the one side of said aligning plate.
References Cited (Backward Citations)
US31387A
Cited
GB676708A
Cited
US2818244A
Cited
GB778765A
Cited
US2920924A
Cited
GB894577A
Cited
GB895294A
Cited
US3046060A
Cited
US3403761A
Cited
US3352388A
Cited
GB1121561A
Cited
GB1159592A
Cited
GB1142500A
Cited
GB1252674A
Cited
US3731767A
Cited
GB1376042A
Cited
US3908805A
Cited
GB1496721A
Cited
US4061212A
Cited
US4036331A
Cited
USRE31387E
Cited
US4046427A
Cited
US4225019A
Cited
US4260201A
Cited
US4377221A
Cited
JPS5514295A
Cited
US4353440A
Cited
US4340258A
Cited
US4281881A
Cited
JPS5545421A
Cited
US4350396A
Cited
US4456309A
Cited
GB2070166A
Cited
GB2069641A
Cited
GB2069639A
Cited
US4401348A
Cited
GB2069642A
Cited
US4456310A
Cited
JPS5733052A
Cited
US4422695A
Cited
GB2109494A
Cited
US4474413A
Cited
US4602705A
Cited
GB2120336A
Cited
US4660683A
Cited
US4673221A
Cited
US4664233A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-08 | 1991-08-10 | 1992-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-08 | 1995-08-10 | 1996-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-08 | 1999-08-10 | 2000-02-09 | $7700.00 | Window Closed / Lapsed |