U.S. patent application number 12/440240 was filed with the patent office on 2009-11-12 for self activated power brake.
Invention is credited to Ashok Kumar Tiwari, Padam Kumar Tiwari.
Application Number | 20090277728 12/440240 |
Document ID | / |
Family ID | 39135149 |
Filed Date | 2009-11-12 |
United States Patent
Application |
20090277728 |
Kind Code |
A1 |
Tiwari; Ashok Kumar ; et
al. |
November 12, 2009 |
Self Activated Power Brake
Abstract
A Self Activated Power Brake comprising a rotating brake disk
fitted coaxially to a wheel and the main brake caliper/shoes fitted
on dead axle/body frame. A sliding mechanism having shaped
resembles to arc in orbit of brake disk. The mechanism having in
two major parts, one is sliding and other is fixed which consists
sliding bed and fitted with main power brake caliper. A pilot brake
caliper, which is in sliding mode (floating mode), fitted on
sliding part of the said sliding mechanism. At least one power
transmitting means out of suggested means is needed to be linked
the sliding pilot brake caliper to main power brake caliper to
transfer the friction power of the pilot brake caliper after
required amplification of the same. On braking action, the pilot
brake caliper which is actuated by fluid line coming from master
cylinder, actuates main power brake caliper through at least one
power transmitting means as aforesaid to do the job as a
SELF-ACTIVATED POWER BRAKE.
Inventors: |
Tiwari; Ashok Kumar; (New
Delhi, IN) ; Tiwari; Padam Kumar; (New Delhi,
IN) |
Correspondence
Address: |
ARNOLD & PORTER LLP;ATTN: IP DOCKETING DEPT.
555 TWELFTH STREET, N.W.
WASHINGTON
DC
20004-1206
US
|
Family ID: |
39135149 |
Appl. No.: |
12/440240 |
Filed: |
September 3, 2007 |
PCT Filed: |
September 3, 2007 |
PCT NO: |
PCT/IN07/00388 |
371 Date: |
March 5, 2009 |
Current U.S.
Class: |
188/72.2 |
Current CPC
Class: |
F16D 2125/30 20130101;
F16D 2121/02 20130101; F16D 2125/66 20130101; B60T 13/02 20130101;
F16D 65/18 20130101; F16D 65/22 20130101; F16D 2127/12 20130101;
F16D 2127/085 20130101 |
Class at
Publication: |
188/72.2 |
International
Class: |
B61H 11/04 20060101
B61H011/04 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 5, 2006 |
IN |
1980/DEL/2006 |
Claims
1.-11. (canceled)
12. A self-activated power brake comprising: a floating (sliding)
brake caliper assembly on its arc shape bed called pilot brake
caliper, mechanical and hydraulically operated means to transfer
the friction power of pilot brake caliper after necessary
amplification as needed for power braking action to main power
brake caliper. a main power brake caliper fixed along with sliding
mechanism on dead axle/body frame capable to receive the said
amplified power to complete power braking function along with pilot
brake caliper simultaneously on same brake disk, said
self-activated power brake optionally comprising: one pilot
caliper/brake shoe fitted on a orbit arc like shape sliding
mechanism in reference of a brake disk/drum fitted on rotating axle
near wheel, power transmitting means, which is an actuating
mechanism that links Main power brake caliper to said pilot caliper
that is mounted on the sliding mechanism as aforesaid, a main power
brake caliper fitted on dead axle or stationary frame of
vehicle/machine, duly linked to the said actuating mechanism/power
transmitting means as aforesaid, a hydraulic fluid line connected
to Pilot brake caliper cylinder from master cylinder having pedal
or lever which has to be depressed for stopping motion of rotating
disk/drum.
13. The self-activated power brake as claimed in claim 12 further
comprising: the orbit arc like sliding mechanism wherein the said
pilot caliper is mounted on the sliding arm (part) that slides in
limited distance as required on its bed. This mechanism covers
about three forth-circumstantial area of the brake disk. the fixed
bed portion of the orbit like sliding mechanism is mounted on dead
axle or body frame as said along with main brake caliper.
14. The self-activated power brake as claimed in claim 12 further
comprising: a power (an auxiliary friction brake force) that is
generated instantly by pilot brake caliper due to friction of
rotating disk on attachment of pilot brake pads on it during the
braking action. The said friction power which has to be collected
with minimum possible losses, to be amplified and to be delivered
it to main brake caliper/shoes through power transmitting means.
the power transmitting means comprising at least one out of
following suggested means and many more according to the concept of
the invention may be possible as design option to meet the main the
purpose of the invention as aforesaid as to collect, to amplify and
to deliver the available friction power from pilot brake caliper to
main power brake caliper. a mechanism of the mechanical levers
pivoted on its center pins mounted on fixed portion of sliding
mechanism. The said levers provide the path of power transmitting
from pilot caliper to main caliper, Power amplification can be done
by the ratio of distance of the arms from connected link pin and
center pin of the lever. A mechanism of mechanical V and Tooth
shape arc plates combination can be utilized to meet the purpose of
power transmitting as above said. The angles of V Tooth with
required degree of both side pads depressing sliding plates amplify
the obtained power and deliver the same at main brake pads
effectively.
15. The self-activated power brake as claimed in claim 12, further
comprising: a master cylinder an actuating mechanism fitted in fix
portion of sliding mechanism with connected its push rod to sliding
part of the sliding mechanism, which also holds the pilot caliper,
a pilot brake caliper mounted in moving (sliding) part of the
sliding mechanism, said, said pilot brake pads depressing cylinder
of the pilot brake caliper is connected through fluid line to
conventional master cylinder of the vehicle/machine, a main power
Brake caliper is fitted along with fix part of sliding mechanism to
the dead axle/body frame of the vehicle/machine said main power
brake pads depressing cylinder is connected through fluid line to
the master cylinder fitted nearby in same fix part on which the
main brake caliper mounts.
16. The self-activated power brake as claimed in claim 12, further
comprising: a round arch shape holding bed in circumstantial area
of brake disk, wherein bed shape may be rectangular dimensions
which can hold in sliding manner the sliding part from up and down,
left and right sides with minimum clearance margin to avoid jam
condition, said fixed holding part of the mechanism covers about
one third circumstantial area of the brake disk, which provides the
fitting of itself with main brake caliper to dead axle/body flame
and the master cylinder (actuating hydraulic mechanism) of main
power brake caliper is also mounted in this part, a sliding part in
same shape as above said which can slide easily in its bed area
said part covers about three forth of circumstantial area of the
disk and having enough strength to hold the pilot brake caliper and
to absorb the thrust thereof when in operation.
17. The self-activated power brake comprising: a floating (sliding)
brake caliper assembly on its arc shape bed called pilot brake
caliper, mechanical and hydraulically operated means to transfer
the friction power of pilot brake caliper after necessary
amplification as needed for power braking action to main power
brake caliper. a main power brake caliper fixed along with sliding
mechanism on dead axle/body frame capable to receive the said
amplified power to complete power braking function along with pilot
brake caliper simultaneously on same brake disk, said
self-activated power brake optionally comprising: one pilot
caliper/brake shoe fitted on a orbit arc like shape sliding
mechanism in reference of a brake disk/drum fitted on rotating axle
near wheel, power transmitting means, which is an actuating
mechanism that links Main power brake caliper to said pilot caliper
that is mounted on the sliding mechanism as aforesaid, a main power
brake caliper fitted on dead axle or stationary frame of
vehicle/machine, duly linked to the said actuating mechanism/power
transmitting means as aforesaid, a hydraulic fluid line connected
to Pilot brake caliper cylinder from master cylinder having pedal
or lever which has to be depressed for stopping motion of rotating
disk/drum; wherein said pilot brake caliper comprising a
conventional disk brake caliper cylinder with pads in case of disk
brake or a customized brake shoe and cylinder as filed figures
mounted in sliding part of the sliding mechanism as said in claim
16.
18. The self-activated power brake as claimed in claim 16, wherein
said pilot brake caliper comprising a conventional disk brake
caliper cylinder with pads in case of disk brake or a customized
brake shoe and cylinder as filed figures mounted in sliding part of
the sliding mechanism as said in claim 16.
19. A self-activated power brake comprising: a floating (sliding)
brake caliper assembly on its arc shape bed called pilot brake
caliper, mechanical and hydraulically operated means to transfer
the friction power of pilot brake caliper after necessary
amplification as needed for power braking action to main power
brake caliper. a main power brake caliper fixed along with sliding
mechanism on dead axle/body frame capable to receive the said
amplified power to complete power braking function along with pilot
brake caliper simultaneously on same brake disk, said
self-activated power brake optionally comprising: one pilot
caliper/brake shoe fitted on a orbit arc like shape sliding
mechanism in reference of a brake disk/drum fitted on rotating axle
near wheel, power transmitting means, which is an actuating
mechanism that links Main power brake caliper to said pilot caliper
that is mounted on the sliding mechanism as aforesaid, a main power
brake caliper fitted on dead axle or stationary frame of
vehicle/machine, duly linked to the said actuating mechanism/power
transmitting means as aforesaid, a hydraulic fluid line connected
to Pilot brake caliper cylinder from master cylinder having pedal
or lever which has to be depressed for stopping motion of rotating
disk/drum; wherein said main brake caliper comprising a
conventional disk brake caliper cylinder with pads in case of disk
brake or a customized brake shoe and cylinder as filed figures
mounted in fixed holding part of the sliding mechanism as said in
claim 16.
20. The self-activated power brake as claimed in claim 16, wherein
said main brake caliper comprising a conventional disk brake
caliper cylinder with pads in case of disk brake or a customized
brake shoe and cylinder as filed figures mounted in fixed holding
part of the sliding mechanism as said in claim 16.
21. A self-activated power brake comprising: a floating (sliding)
brake caliper assembly on its arc shape bed called pilot brake
caliper, mechanical and hydraulically operated means to transfer
the friction power of pilot brake caliper after necessary
amplification as needed for power braking action to main power
brake caliper. a main power brake caliper fixed along with sliding
mechanism on dead axle/body frame capable to receive the said
amplified power to complete power braking function along with pilot
brake caliper simultaneously on same brake disk, said
self-activated power brake optionally comprising: one pilot
caliper/brake shoe fitted on a orbit arc like shape sliding
mechanism in reference of a brake disk/drum fitted on rotating axle
near wheel, power transmitting means, which is an actuating
mechanism that links Main power brake caliper to said pilot caliper
that is mounted on the sliding mechanism as aforesaid, a main power
brake caliper fitted on dead axle or stationary frame of
vehicle/machine, duly linked to the said actuating mechanism/power
transmitting means as aforesaid, a hydraulic fluid line connected
to Pilot brake caliper cylinder from master cylinder having pedal
or lever which has to be depressed for stopping motion of rotating
disk/drum; wherein said master cylinder the actuating hydraulic
mechanism comprising: a conventional or customized hydraulic
cylinder which can be mounted in fixed part of sliding mechanism as
said in claim 16, which can work as master cylinder during pilot
brake caliper sliding up on getting friction force from rotating
disk such that the generated friction power thrusts the piston of
the said master cylinder which provides pressurized fluid through
connected pressure line to main power brake caliper cylinder for
performing power braking action.
22. The self-activated power brake as claimed in claim 16, wherein
said master cylinder the actuating hydraulic mechanism comprising:
a conventional or customized hydraulic cylinder which can be
mounted in fixed part of sliding mechanism as said in claim 16,
which can work as master cylinder during pilot brake caliper
sliding up on getting friction force from rotating disk such that
the generated friction power thrusts the piston of the said master
cylinder which provides pressurized fluid through connected
pressure line to main power brake caliper cylinder for performing
power braking action.
23. A self-activated power brake comprising: a floating (sliding)
brake caliper assembly on its arc shape bed called pilot brake
caliper, mechanical and hydraulically operated means to transfer
the friction power of pilot brake caliper after necessary
amplification as needed for power braking action to main power
brake caliper. a main power brake caliper fixed along with sliding
mechanism on dead axle/body frame capable to receive the said
amplified power to complete power braking function along with pilot
brake caliper simultaneously on same brake disk, said
self-activated power brake optionally comprising: one pilot
caliper/brake shoe fitted on a orbit arc like shape sliding
mechanism in reference of a brake disk/drum fitted on rotating axle
near wheel, power transmitting means, which is an actuating
mechanism that links Main power brake caliper to said pilot caliper
that is mounted on the sliding mechanism as aforesaid, a main power
brake caliper fitted on dead axle or stationary frame of
vehicle/machine, duly linked to the said actuating mechanism/power
transmitting means as aforesaid, a hydraulic fluid line connected
to Pilot brake caliper cylinder from master cylinder having pedal
or lever which has to be depressed for stopping motion of rotating
disk/drum; wherein drum brake further comprises the actuating
mechanism as claimed in claim 21 is a mechanical mechanism of oval
shape instead of master cylinder type, when the pilot caliper
engages to the said rotating drum, the oval shaped actuating
mechanism tilts and engages the brake shoes by at least one
mechanical means (E5).
24. The self-activated power brake as claimed in claim 21, wherein
drum brake further comprises the actuating mechanism as claimed in
claim 21 is a mechanical mechanism of oval shape instead of master
cylinder type, when the pilot caliper engages to the said rotating
drum, the oval shaped actuating mechanism tilts and engages the
brake shoes by at least one mechanical means (E5).
25. The self-activated power brake as claimed in claim 22, wherein
drum brake further comprises the actuating mechanism as claimed in
claim 22 is a mechanical mechanism of oval shape instead of master
cylinder type, when the pilot caliper engages to the said rotating
drum, the oval shaped actuating mechanism tilts and engages the
brake shoes by at least one mechanical means (E5).
26. The self-activated power brake as claimed in claim 12, wherein
said actuating mechanism is of eye shape so that when said pilot
caliper engages to the said drum brake, said eye shaped actuating
mechanism tilts and engages the brake shoes by hydraulic means
(E6).
Description
FIELD OF THE INVENTION
[0001] This invention relates to "Self Activated Power Brake".
BACKGROUND OF THE INVENTION
[0002] The existing power brakes in automobiles, industries,
railways etc. are activated by externally generated power through
electric motor, hydraulic pump, air compressor or some other means.
The power brake system is needed to assist or ease the driver of
the vehicle or operator of the machine, as it requires a lot of
power to stop any heavy moving object. This existing facility
increases cost like the cost of electric motor, hydraulic pump or
air compressor and running cost of the system too. In every braking
system in a machine external force is required to stop or slow down
the rotating wheel or any part of the machine, making the system as
a whole more complicated and bulky.
OBJECT OF THE INVENTION
[0003] Object of this invention is to obviate the above drawbacks
by providing a "Self Activated Power Brake".
SUMMARY OF THE INVENTION
[0004] To achieve the said objective, this invention provides A
Self Activated Power Brake comprising: [0005] a rotating disk/drum
coaxially fitted to a wheel, [0006] a housing to hold brake shoes
of a brake in a fixed position with respect to the rotating
disk/drum, [0007] a brake pedal system to transmit motion generated
by hand or foot to at least one actuating pilot caliper, [0008]
said pilot caliper is attached to at least one actuating mechanism,
which actuates said brake shoes.
[0009] The actuating mechanism comprising: [0010] at least one
linkage mechanism to link said pilot caliper to at least one
transmitting means so that force from pilot caliper can be
transmitted to said transmitting means, [0011] said transmitting
means to apply force on at least one engaging means, [0012] at
least one engaging means to engage said brake shoes to said
rotating disk/drum when force is applied.
[0013] The pilot caliper comprising: [0014] at least one engaging
brake shoe to engage to said rotating, disk/drum when motion is
transmitted from said brake pedal system, [0015] a movable holding
frame to hold said engaging brake shoes.
[0016] The brake is a disc brake, a drum brake, a hydraulic brake,
a pneumatic brake or a railway mechanical brake.
[0017] The linkage mechanism is either a mechanical link or a
sliding piston arrangement.
[0018] The transmitting means is at least one lever system or at
least one V shaped slot or at least one master cylinder hydraulic
system.
[0019] The engaging means is at least one sliding piston
arrangement or at least one V shaped protrusion or at least one
hydraulic sliding piston arrangement.
[0020] The actuating mechanism is of oval shape so that when said
pilot caliper engages to said drum brake, said oval shaped
actuating mechanism tilts and engages the brake shoes by at least
one mechanical means (E5).
[0021] The actuating mechanism is of eye shape so that when said
pilot caliper engages to said drum brake, said eye shaped actuating
mechanism tilts and engages the brake shoes by hydraulic means
(E6).
[0022] The pilot caliper engages to said disc brake and actuates
said linkage mechanism, which further transmits force to said
transmitting means so that it enables the engaging means to engage
the brake shoes to said rotating disk/drum.
BRIEF DESCRIPTION OF THE INVENTION
[0023] The invention will now be described with reference to
accompanying drawings:
[0024] FIG. 1 shows the sectional view of "Self Activated Power
Brake" for disc brake with mechanical lever.
[0025] FIG. 2 shows the sectional view of "Self Activated Power
Brake" for disc brake with V shaped arrangement.
[0026] FIG. 3 shows the sectional view of "Self Activated Power
Brake" for disc brake with two V shaped arrangement.
[0027] FIG. 4 shows the sectional view of "Self Activated Power
Brake" for disc brake with hydraulic arrangement.
[0028] FIG. 5 shows the side view of "Self Activated Power Brake"
for drum brake with mechanical arrangement.
[0029] FIG. 6 shows the side view of "Self Activated Power Brake"
for drum brake with hydraulic arrangement.
[0030] FIG. 7 shows the side view of "Self Activated Power Brake"
for disc brake with V shaped arrangement.
[0031] FIG. 8 shows the side view of "Self Activated Power Brake"
for disc brake with hydraulic arrangement.
[0032] FIG. 9 shows the sectional view of Pilot Caliper of "Self
Activated Power Brake".
[0033] FIG. 10 shows the perspective view of "Self Activated Power
Brake" for railways.
DETAILED DESCRIPTION OF THE INVENTION
[0034] Referring to the drawings Self Activated Power Brake is made
up of a rotating disk/drum (A) coaxially fitted to a wheel (not
shown in figures). A housing (F) to hold brake shoes (G) of a brake
is provided in a fixed position with respect to said rotating disk.
A brake pedal system connected to hydraulic light pressure line (N)
to transmit motion generated by hand or feet to at least one
actuating pilot caliper (B). Said pilot caliper (B) is attached to
preferably one actuating mechanism, which actuates said brake shoes
(G). The actuating, mechanism has preferably one linkage mechanism
(M) to link said pilot caliper to at least one transmitting means,
so that force from the pilot caliper can be transmitted to said
transmitting means. Said transmitting means applies force on at
least one engaging means, when force is transmitted. Said engaging
means, engages said brake shoes (G) to said rotating disk (A) when
force is applied. The pilot caliper (B) is made up of at least one
engaging brake shoe (P) to engage to the rotating disk, when motion
is transmitted from said brake pedal system and a movable holding
frame (Q). Said linkage mechanism consists of a pilot caliper
having sliding piston (C) connected to pilot caliper (B) at one end
and said actuating mechanism at other end.
[0035] FIG. 1 shows Self Activated Power Brake for disc brake with
mechanical lever according to one embodiment of the present
invention. In this embodiment actuating mechanism is a mechanical
lever system (D1) with two flexible L shaped levers (L1 and L2) so
that when actuating mechanism is actuated said levers (L1 and L2)
push engaging means (E1) so as to engage the brake shoes (G) to the
rotating disk (A).
[0036] FIG. 2 shows Self Activated Power Brake for disc brake with
V shaped arrangement according to one embodiment of the present
invention. In this embodiment actuating mechanism is an arm (D2)
with a V shaped slot so that when actuating mechanism is actuated
said V shaped slot moves and pushes V shaped protrusion of engaging
means (E2) so as to engage the brake shoes (G) to the rotating disk
(A). Alignment and centering is done by main brake housing on
mounted pin (H).
[0037] FIG. 3 shows Self Activated Power Brake for disc brake with
two V shaped arrangement according to one embodiment of the present
invention. In this embodiment actuating mechanism is an arm (D3)
with two V shaped slot so that when actuating mechanism is actuated
said V shaped slot moves and pushes both V shaped protrusion of
engaging means (E3) so as to engage the both brake shoes (G) to the
rotating disk (A) uniformly from both sides so wear and tear in
both the brake shoes are uniform. This principle can be used in
other embodiments as well. Alignment and centering is done by
adjusting screws (J3 and K3).
[0038] FIG. 4 shows Self Activated Power Brake for disc brake with
hydraulic arrangement according to one embodiment of the present
invention. In this embodiment actuating mechanism is a master
cylinder (D4) so that when actuating mechanism is actuated said
master cylinder applies pressure on hydraulic sliding piston (E4)
so as to engage the brake shoes (G) to the rotating disk (A).
[0039] FIG. 5 shows Self Activated Power Brake for drum brake with
mechanical arrangement according to one embodiment of the present
invention. In this embodiment actuating mechanism is an oval shaped
arm (D5) so that when actuating mechanism is actuated said oval
shaped arm moves and pushes concave shaped engaging means (E5) so
as to engage the brake shoes (G) to the rotating disk (A). Tension
spring (I) is connected to said brake shoes (G) to keep them
untouched to the drum in ideal condition. Gap adjusting arrangement
(H) is provided to adjust gap between said shoes (G) and said drum
(A).
[0040] FIG. 6 shows Self Activated Power Brake for drum brake with
hydraulic arrangement according to one embodiment of the present
invention. Engaging brake shoe (P) is connected to two sliding
piston cylinders (C) connected to hydraulic pressure line (N) to
engage with the rotating drum (A). In this embodiment actuating
mechanism is an eye shaped arm (D6) so that when actuating
mechanism is actuated said eye shaped arm tilts and pushes engaging
means (E6) so as to build up pressure in hydraulic master cylinders
(R) which further build up pressure in main hydraulic cylinder (K)
to engage the brake shoes (G) to the rotating drum (A). Tension
spring (I) is connected to said brake shoes (G) to keep them
untouched to the drum in ideal condition. Gap adjusting arrangement
(H) is provided to adjust, gap between said shoes (G) and said drum
(A).
[0041] FIG. 10 shows Self Activated Power Brake for disc brake with
mechanical lever according to one embodiment of the present
invention for railways. In this embodiment actuating mechanism is a
mechanical lever system (D10) so that when actuating mechanism is
actuated engaging means (E10) engages the brake shoes (G) to the
rotating disk (A).
[0042] Said Self Activated Power Brake can be used in a disc brake,
a drum brake, a hydraulic brake or a pneumatic brake or mechanical
brakes of railways. Force applied by the brake shoes on the
disc/drum is multifold of the force applied by the driver/operator
on the brake pedal as the pilot caliper generates the actual force
for the brake shoes. Again as the actual force is generated by the
pilot caliper, when rotating disk/drum is stopped completely said
force becomes zero and the main brake shoes are released from the
disk.
[0043] Although the invention has been described with reference to
specific embodiments, this description is not meant to be construed
in a limiting sense. Various modifications of the disclosed
embodiments, as well as alternate embodiments of the invention,
will become apparent to persons skilled in the art upon reference
to the description of the invention. It is therefore contemplated
that such modifications can be made without departing from the
spirit or scope of the present invention as defined.
* * * * *