Sealed dry disc brake

Details Sealed dry disc brake Sealed dry disc brake

1999-08-17

2002-06-04

Rodriguez, Pam (Department: 3613)

Brakes

Wheel

Axially movable brake element or housing therefor

C188S01800A

Reexamination Certificate

active

06397980

ABSTRACT:

BACKGROUND OF THE INVENTION
This invention relates a dry disc brake wherein the interface between the friction pads and the rotating member is sealed from the environment.
Disc brakes are utilized in a variety of braking applications. In particular, disc brakes are utilized in heavy vehicle braking. One known type of disc brake is a “dry” disc brake. In a second type known as a “wet” disc brake, the brake discs are secured in a sealed chamber carrying a fluid. In a dry disc brake, hydraulic pistons are actuated to engage friction pads with a rotating surface. The engagement of the friction pads and the rotating surface slows rotation of the rotating surface.
A dry disc brake
20
as known in the prior art is shown in
FIG. 1. A
fixed housing
22
carries a pair of opposed pistons
24
. Pistons
24
are supplied with fluid through fluid communication lines
26
. The fluid communication lines receive a hydraulic fluid to move the pistons
24
and pads
30
towards a rotating disc
28
. A pad
30
is actuated on each side of the disc
28
. When the system attempts to brake rotation of the rotating member
28
, hydraulic fluid is supplied to the pistons
24
which are forced inwardly, forcing the pads
30
against the rotating member
28
. This slows rotation of the rotating member
28
. In the embodiment shown in
FIG. 1
, an open area
32
is defined inwardly of the rotating member
28
and the pad
30
.
This open area allows debris to reach the interface between the pads
30
and the rotating member
28
. This can affect the braking characteristics of the system. Further, the open area
32
might present sparking issues in certain applications. Finally, the braking force occurs over a limited area on the two sides of the rotating member
28
. The heat created by the braking is entirely on the one small rotating member
28
in this prior art system.
SUMMARY OF THE INVENTION
In a disclosed embodiment of this invention, the fixed components of a dry disc brake are positioned internally of the rotating components. The rotating components surround the pistons and pads, and seal the interface between the pads and the rotating member from debris, etc. Further, the interface is provided on two discs of the rotating member such that the surface area which carries the braking load is on two separate housing components. Thus, there is twice as much housing surface area for carrying heat away from the braking operation when compared to the prior art. These and other features of the present invention can be best understood from the following specification and drawings, the following of which is a brief description.


REFERENCES:
patent: 2268329 (1941-12-01), Ash
patent: 2323052 (1943-06-01), Klaue
patent: 2329097 (1943-09-01), Ash
patent: 3633714 (1972-01-01), Klaue
patent: 3942610 (1976-03-01), Klaue
patent: 3980347 (1976-09-01), Griesenbrock
patent: 4024931 (1977-05-01), Klaue
patent: 4054189 (1977-10-01), Klaue
patent: 4139081 (1979-02-01), Klaue
patent: 4325466 (1982-04-01), Klaue
patent: 1134902 (1962-08-01), None

Affiliated with

Also associated with

Rating

Sealed dry disc brake does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sealed dry disc brake, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sealed dry disc brake will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2955784