Fluid-pressure and analogous brake systems – Multiple fluid-receiving devices – Multiple motors
Patent
1992-05-18
1994-10-11
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Multiple fluid-receiving devices
Multiple motors
188349, 303 241, B60T 828, B60T 832
Patent
active
053541227
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention is related to a seating for an inertia ball used in a deceleration sensitive brake control power.
A seating of this kind shown in German patent application published without examination, No. 3,709,991. There, the inertia ball lies in a funnel-shaped depression with different angles of inclination, which depression is formed by ribs which are directed radially inwardly toward a control valve. Due to the different angles of inclination, the inertia ball is given an oval seating and, consequently, a certain amount of horizontal play. The ball when centered on the ribs keeps a spring loaded control valve open, but is caused to roll out of the funnel upon being subjected to a predetermined rate of deceleration, permitting the valve to close. It has, however, been discovered that due to vibrations of the vehicle, the ball may start to dance or to turn round and, as a result, can be caused to roll out at various different rates of decelerations.
It is the object of the present invention to create a suitable seating for an inertia ball which ensures a virtually perfectly stable position of the inertia ball until a predetermined deceleration rate is reached and which eliminates any response to lower rates of deceleration.
SUMMARY OF THE INVENTION
This object is achieved by a stepped shaped edge employed to engage a limited portion of the perimeter of the ball, with the stepped edge engagement not allowing any movement of the ball in a horizontal direction below a predetermined rate of deceleration of the vehicle. Variations in the deceleration rates causing movement of the inertia ball out of the seat are thus avoided.
According to another feature of the invention, the inertia ball is positively restrained in a direction opposite the direction of motion in order to achieve a greater stability. This feature will scarcely impair the functioning of the brake power control, since in this configuration the inertia ball is only prevented from leaving the seating by an acceleration of the vehicle. When this positive restraint is realized by a rear wall which defines the first chamber, the mounting of any additional elements will not be required. If, however, pins are additionally introduced into the first chamber from the outside horizontally from the rear, then, advantageously, a precision adjustment may be carried out subsequently.
Either a pitch circle-shaped supporting socket which extends in circumferential direction or individual points of support are of advantage.
The invention may take the form of various embodiments. In the following, some examples of these will be described in more detail, making reference to accompanying drawings.
DESCRIPTION OF THE DRAWINGS
FIG. 1a is a partial cross sectional view showing details of a brake power control with a seating of the inertia ball according to the present invention;
FIG. 1b is a partial cross sectional view taken through FIG. 1a along the line 1b--1b;
FIG. 2a is a fragmentary, cross sectional view of a second embodiment of the seating according to the invention;
FIG. 2b is a fragmentary top view of the embodiment shown in FIG. 2a;
FIG. 3a is a fragmentary cross sectional view, of a third embodiment;
FIG. 3b is a fragmentary top view of the third embodiment;
FIG. 4a is a fragmentary, cross sectional view, of a fourth embodiment;
FIG. 4b is a fragmentary top view of the fourth embodiment;
FIG. 5a is a fragmentary, partially sectional view of another brake power control showing yet another embodiment of the seating according to the present invention.
FIG. 5b is a top view of the seating embodiment shown in FIG. 5a.
DETAILED DESCRIPTION
In FIG. 1a and in FIG. 1b the position of the inertia ball 1 within a first chamber 4 is visible. The chamber 4 is formed by a housing 2 and by a closing cap 3. The bottom area 5 which is almost completely flat is furnished with a vertically directed hole 6 which connects the first chamber 4 to a second chamber 7. The mouth of the hole 6 into the second chamber 7 defines a valve seat 8 fo
REFERENCES:
patent: 3476443 (1969-11-01), Bratten et al.
patent: 4718734 (1988-01-01), Gaiser
patent: 4736989 (1988-04-01), Myers et al.
patent: 4840433 (1989-06-01), Schonlau et al.
patent: 5022715 (1991-06-01), Schonlau
patent: 5195806 (1993-03-01), Schonlau et al.
Hayn Holger Von
Schonlau Juergen
Alfred Teves GmbH
Butler Douglas C.
Lewis J. Gordon
Seitter Robert P.
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