U.S. patent application number 11/564209 was filed with the patent office on 2008-05-29 for laminated tie plate.
This patent application is currently assigned to Yung-Yi CHEN. Invention is credited to Tsun-Lirng YANG.
Application Number | 20080121732 11/564209 |
Document ID | / |
Family ID | 39493141 |
Filed Date | 2008-05-29 |
United States Patent
Application |
20080121732 |
Kind Code |
A1 |
YANG; Tsun-Lirng |
May 29, 2008 |
LAMINATED TIE PLATE
Abstract
A tie plate includes an outer casing having a first wall
extending upward from a peripheral edge defining the hole, a rubber
casing received inside the outer casing by extending into the hole
of the outer casing and having a second wall extending from a
peripheral edge defining the recess to be engaged with an inner
face of the first wall and a mediate plate securely received inside
the recess of the rubber casing and sandwiched between the rubber
casing and the outer casing. Enclosure of the inner face of the
first wall of the outer casing to the outer periphery of the second
wall limits relative movement between the rubber casing and the
outer casing.
Inventors: |
YANG; Tsun-Lirng;
(Ming-Hsiung, TW) |
Correspondence
Address: |
PATENTTM.US
P. O. BOX 82788
PORTLAND
OR
97282-0788
US
|
Assignee: |
CHEN; Yung-Yi
Ming-Hsiung
TW
|
Family ID: |
39493141 |
Appl. No.: |
11/564209 |
Filed: |
November 28, 2006 |
Current U.S.
Class: |
238/287 |
Current CPC
Class: |
E01B 9/42 20130101 |
Class at
Publication: |
238/287 |
International
Class: |
E01B 9/02 20060101
E01B009/02 |
Claims
1. A tie plate comprising: an outer casing engageable with a tie
and having a centrally defined hole, a first wall extending upward
from a peripheral edge defining the hole; a rubber casing received
inside the outer casing by extending into the hole of the outer
casing, the rubber casing having a recess in communication with the
hole of the outer casing and a second wall extending from a
peripheral edge defining the recess, the second wall being
configured in such a manner that an outer periphery of the second
wall securely engages with an inner face of the first wall; and a
mediate plate securely received inside the recess of the rubber
casing and sandwiched between the rubber casing and the outer
casing, the mediate plate having a top face with a first area and a
bottom with a second area larger than that of the first area so
that after the mediate plate is received in the recess of the
rubber casing, an outer periphery of the mediate plate engages with
an inner face of the second wall to secure engagement between the
mediate plate and the rubber casing and enclosure of the inner face
of the first wall of the outer casing to the outer periphery of the
second wall limits relative movement between the rubber casing and
the outer casing.
2. The tie plate as claimed in claim 1, wherein the outer casing
has through holes defined therethrough for extension of fasteners
into a tie so as to secure the outer casing to the tie.
3. The tie plate as claimed in claim 2, wherein teeth is formed on
the outer casing such that after the fasteners are extended through
the through holes, engagement of the fasteners with the teeth
increases friction of the fasteners with the outer casing to
prevent the fasteners from loosening.
4. The tie plate as claimed in claim 1, wherein the outer casing
has through holes defined therethrough for extension of fasteners
into a tie so as to secure the outer casing to the tie and bosses
are formed on a bottom face of the rubber casing such that friction
between the rubber casing and the tie is increased.
5. The tie plate as claimed in claim 2, wherein bosses are formed
on a bottom face of the rubber casing such that friction between
the rubber casing and the tie is increased.
6. The tie plate as claimed in claim 3, wherein bosses are formed
on a bottom face of the rubber casing such that friction between
the rubber casing and the tie is increased.
7. The tie plate as claimed in claim 1, wherein an inner face of
the first wall is arcuate and an outer periphery of the rubber
casing is arcuate such that when the rubber casing is extended into
the hole of the outer casing, engagement between the outer
periphery of the second wall of the rubber casing and the inner
face of the first wall of the outer casing is secured.
8. The tie plate as claimed in claim 2, wherein an inner face of
the first wall is arcuate and an outer periphery of the rubber
casing is arcuate such that when the rubber casing is extended into
the hole of the outer casing, engagement between the outer
periphery of the second wall of the rubber casing and the inner
face of the first wall of the outer casing is secured.
9. The tie plate as claimed in claim 3, wherein an inner face of
the first wall is arcuate and an outer periphery of the rubber
casing is arcuate such that when the rubber casing is extended into
the hole of the outer casing, engagement between the outer
periphery of the second wall of the rubber casing and the inner
face of the first wall of the outer casing is secured.
10. The tie plate as claimed in claim 4, wherein an inner face of
the first wall is arcuate and an outer periphery of the rubber
casing is arcuate such that when the rubber casing is extended into
the hole of the outer casing, engagement between the outer
periphery of the second wall of the rubber casing and the inner
face of the first wall of the outer casing is secured.
11. The tie plate as claimed in claim 5, wherein an inner face of
the first wall is arcuate and an outer periphery of the rubber
casing is arcuate such that when the rubber casing is extended into
the hole of the outer casing, engagement between the outer
periphery of the second wall of the rubber casing and the inner
face of the first wall of the outer casing is secured.
12. The tie plate as claimed in claim 6, wherein an inner face of
the first wall is arcuate and an outer periphery of the rubber
casing is arcuate such that when the rubber casing is extended into
the hole of the outer casing, engagement between the outer
periphery of the second wall of the rubber casing and the inner
face of the first wall of the outer casing is secured.
13. The tie plate as claimed in claim 3, wherein the mediate plate
has a pair of positioning ears and a inclined face located between
the two positioning ears.
14. The tie plate as claimed in claim 6, wherein the mediate plate
has a pair of positioning ears and a inclined face located between
the two positioning ears.
15. The tie plate as claimed in claim 9, wherein the mediate plate
has a pair of positioning ears and a inclined face located between
the two positioning ears.
16. The tie plate as claimed in claim 13, wherein the first wall is
conical and the second wall is conical.
17. The tie plate as claimed in claim 14, wherein the first wall is
conical and the second wall is conical.
18. The tie plate as claimed in claim 15, wherein the first wall is
conical and the second wall is conical.
19. The tie plate as claimed in claim 14, wherein the first wall of
the outer casing consists of a pair of mutually inclined sides and
a pair of vertical sides, the pair of mutually inclined sides is
tilted toward the hole of the outer casing.
20. The tic plate as claimed in claim 15, wherein the first wall of
the outer casing consists of a pair of mutually inclined sides and
a pair of vertical sides, the pair of mutually inclined sides is
tilted toward the hole of the outer casing.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a tie plate, and more
particularly to a laminated plate.
[0003] 2. Description of the Prior Art
[0004] A tie plate is a device under the rails to position the
rails in position on top of a tie. Therefore, when a train is on
top of the rails, the ties arc able to support the weight o the
train and to reduce noise caused by the whirling train.
[0005] A conventional tie plate, as shown in FIGS. 7 and 8,
includes a top plate (50), a bottom plate (54) and a rubber layer
(53).
[0006] The top plate (50) has a pair of positioning ears (51) on a
top face thereof and a pair of cutouts (52) defined in diagonal
corners of the top plate (50). The bottom plate (54) is provided
under the top plate (50) and includes a pair of through holes (55)
respectively corresponding to the cutouts (52) of the top plate
(50). The rubber layer (53) is sandwiched between the top plate
(50) and the bottom plate (54) and respectively engages with the
top plate (50) and the bottom plate (54).
[0007] In the existing process of making the conventional tie
plate, the rubber layer (53) is superposed on top of the bottom
plate (54) and then the top plate (50) is superposed on top of the
rubber layer (53). After components of the tie plate are stacked on
top of each other, the combination of the tie plate is sent for
hardening by addition of sulfur.
[0008] After the tie plate is completed, the tie plate is fixed on
top of a tie via fasteners extending through the two through holes
(55). Then the rail is positioned between the two positioning ears
(51) via clamps such as Pandrol.RTM. clamp. One side of the
Pandrol.RTM. clamp is securely connected to one of the two
positioning ears (51) and the other side of the Pandrol.RTM. clamp
is securely connected to a bottom side face of the rail such that
the rail is securely fastened on top of the tie plate.
[0009] However, after a period of time using the tie plate, due to
constant exposure to sun and late night temperature, the tie plate
becomes hardened and components of the tie plate become easily
detached from one another. As a result, not only the tie plate can
not provide the support and cushion effect to the train, but also
the train is easily derailed should the components of the tie plate
become detached to one another.
[0010] To overcome the shortcomings, the present invention tends to
provide an improved tie plate to mitigate the aforementioned
problems.
SUMMARY OF THE INVENTION
[0011] The primary objective of the present invention is to provide
a laminated tie plate having restricting designs to prevent
components of the tie plate from detachment with one another.
[0012] In order to accomplish the aforementioned objective, the tie
plate of the present invention includes an outer casing, a rubber
casing received inside the outer casing and a mediate plate
sandwiched between the outer casing and the rubber casing. The
outer casing has a centrally defined hole, a substantially conical
first wall extending from a periphery defining the hole and teeth
formed on a top face of the outer casing. The rubber casing has a
centrally defined recess communicating with the hole of the outer
casing and a substantially conical second wall extending from a
periphery defining the recess. The conical second wall has a
dimension configured in such a way that an outer periphery of the
conical second wall is securely engaged with an inner periphery of
the conical first wall after the rubber casing is extended into the
hole of the outer casing. The mediate plate has a top face with a
first area and a bottom face with a second area larger than that of
the first area. The mediate plate further has a pair of positioning
ears formed on the top face and an inclined face formed on the top
face of the mediate plate. Further, a bottom face of the rubber
casing is provided with bosses formed thereon. Therefore, when
fasteners are extended through the outer casing to fix the tie
plate of the present invention on top of a tie, engagement between
the fasteners and the teeth prevents the fasteners from loosening.
In addition, the bosses on the bottom face of the rubber casing
increase friction between the tie plate and the tie.
[0013] Other objects, advantages and novel features of the
invention will become more apparent from the following detailed
description when taken in conjunction with the accompanying
drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0014] FIG. 1 is an exploded perspective view of the tie plate of
the present invention,
[0015] FIG. 2 is a bottom plan view of the rubber casing of the
present invention;
[0016] FIG. 3 is a partially cross sectional view showing the
structure of the combined tie plate of the present invention;
[0017] FIG. 4 is a schematic side plan view showing the application
of the tie plate of the present invention;
[0018] FIG. 5 is a partially cross sectional view showing the
structure of the second embodiment of the structure of the tie
plate of the present invention;
[0019] FIG. 6 is a top plan view showing the third embodiment of
the outer casing of the present invention;
[0020] FIG. 6A is a cross sectional view of the outer casing taken
by line 6A-6A in FIG. 6;
[0021] FIG. 6B is a cross sectional view of the outer casing taken
by line 6B-6B in FIG. 6;
[0022] FIG. 7 is a top plan view of a conventional tie plate;
and
[0023] FIG. 8 is a schematically cross sectional view of the
conventional tie plate.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0024] With reference to FIGS. 1, 2, and 3, it is noted that the
tie plate in accordance with the present invention includes an
outer casing (10), a rubber casing (30) received inside the outer
casing (10) and a mediate plate (20) sandwiched between the outer
casing (10) and the rubber casing (30).
[0025] The outer casing (10) has a centrally defined hole (11), a
substantially conical first wall (12) extending from a periphery
defining the hole (11), through holes (13) defined in corners of
the outer casing (10) and teeth (14) formed on a top face of the
outer casing (10) and adjacent to each of the through holes
(13).
[0026] The rubber casing (30) has a centrally defined recess (31)
corresponding to and communicating with the hole (11) of the outer
casing (10) and a substantially conical second wall (32) extending
from a periphery defining the recess (31). A bottom face of the
rubber casing (30) is provided with multiple bosses (33) formed
thereon. The conical second wall (32) has a dimension configured in
such a way that an outer periphery of the conical second wall (32)
is able to securely engage with an inner periphery of the conical
first wall (12) of the outer casing (10) after the rubber casing
(30) is extended into the hole (11) of the outer casing (10).
[0027] The mediate plate (20) has a top face with a first area and
a bottom face with a second area larger than that of the first
area. The mediate plate (20) further has a pair of positioning ears
(21) formed on the top face thereof and an inclined face (22)
formed on the top face of the mediate plate (20).
[0028] With reference to FIG. 3 especially, it is noted that when
the tie plate of the present invention is assembled, the mediate
plate (20) is extended into the hole (11) of the outer casing (10)
to allow the outer periphery to securely engage with the inner face
of the conical first wall (12) of the outer casing (10). Then the
rubber casing (30) is also extended into the hole (11) of the outer
casing (10) to allow the conical second wall (32) to securely
engage with the inner face of the conical first wall (12).
Thereafter, sulfur is added to secure the engagement among the
outer casing (10), the mediate plate (20) and the rubber casing
(30).
[0029] With reference to FIG. 4, after the combination of the tie
plate of the present invention is completed, the tie plate is
placed on a solid seat, such as a tie (43). Fasteners (40), i.e.
threaded bolts or the like, are employed to extend through the
through holes (13) of the outer casing (10) and into the tie (43)
to secure the tie plate of the present invention on top of the tie
(43). Due to the provision of the teeth (14) on top of the outer
casing (10), friction is provided between the fasteners (40) and
the outer casing (10) so that the fasteners (40) are kept engaged
with the outer casing (10). Also, the provision of the bosses (33)
at the bottom of the rubber casing (30) increase friction between
the tie plate of the present invention and the tie (43) so that the
rubber casing (43) is not movable relative to the tie (43).
[0030] It is appreciated that an I shaped rail (41) is placed on
top of the inclined face (22) of the mediate plate (20) to allow
the rail (41) to be inclined relative to the ground and between the
two positioning ears (21). Then a Pandrol.RTM. clamp (42) is
applied to respectively engage with one of the positioning ears
(21) and a side of the rail (41) to fix the rail (41) between the
two positioning ears (21).
[0031] Thereafter, when a train is riding on top of the rail (41),
the rubber casing (30) is able to provide the necessary cushion and
shock absorbing effect to smoothen the movement of the train on top
of the rail (41).
[0032] Because the conical first wall (12) encloses the periphery
of the mediate plate (20) and the conical second wall (32) and the
fasteners (40) secures the tie plate of the present invention to
the tie (43), the overall structure of the tie plate of the present
invention is kept complete such that accident of the train caused
by damaged tie plate is avoided.
[0033] With reference to FIG. 5, it is noted that in this
embodiment of the present invention, the inner face of the conical
first wall (12A) of the outer casing (10A) is arcuate and the outer
periphery of the rubber casing (30A) is also arcuate such that the
engagement between the outer casing (10A) and the rubber casing
(30A) is even secured.
[0034] With reference to FIGS. 6, 6A and 6B, in this embodiment, it
is noted that the conical first wall (12B of the outer casing (10B)
has one pair of mutually inclined sides and one pair of vertical
extending sides. The pair of mutually inclined sides is tilted
toward the hole (11B), which can still accomplish the objective of
enclosing the mediate plate (20) and the rubber casing (30) as
disclosed in the first embodiment of the present invention.
[0035] Therefore, it is noted that the first wall (12) of the outer
casing (10) is able to enclose and maintain the mediate plate (20)
and the rubber casing (30) inside the hole (11) of the outer casing
(10) so that the integrity of the tie plate of the present
invention is maintained during the entire life span of the tie
plate.
[0036] It is to be understood, however, that even though numerous
characteristics and advantages of the present invention have been
set forth in the foregoing description, together with details of
the structure and function of the invention, the disclosure is
illustrative only, and changes may be made in detail, especially in
matters of shape, size, and arrangement of parts within the
principles of the invention to the fall extent indicated by the
broad general meaning of the terms in which the appended claims are
expressed.
* * * * *