U.S. patent application number 11/245810 was filed with the patent office on 2007-04-12 for four parts manhole enabling an easy install and height adjustment.
Invention is credited to Jung Ho Yoon.
Application Number | 20070081857 11/245810 |
Document ID | / |
Family ID | 37911194 |
Filed Date | 2007-04-12 |
United States Patent
Application |
20070081857 |
Kind Code |
A1 |
Yoon; Jung Ho |
April 12, 2007 |
Four parts manhole enabling an easy install and height
adjustment
Abstract
A manhole comprised of four parts is provided. The manhole is
comprised of an outer-manhole pipe, an inner-manhole pipe, a
manhole cover, and a support pipe. Pluralities of concave arc band
shape blades are horizontally developed along the inner surface of
the outer manhole pipe. Same number of convex arc band shape blades
is horizontally developed along the outer surface of the inner
manhole pipe. The inner-manhole pipe is inserted into the
outer-manhole pipe vertically when the two kinds of arc shape
blades aligned to make pass way for each other. When a desired
height is reached, workers rotate the inner-manhole pipe 60 degrees
horizontally and put down the inner-manhole pipe. Then the two
kinds of blades are overlapped and fix the height of the manhole
cover. A support pipe, comprised of two pieces of equal hemi-pipe
connected one end, is engaged between the top flange of the
inner-manhole pipe and top end of the outer manhole pipe to hold
and support the distance between them.
Inventors: |
Yoon; Jung Ho; (Sasang-Ku,
KR) |
Correspondence
Address: |
Eugene Oak, Ph.D., J.D., M.Div., Patene Attorney;Law Office of Jane Oak
and Associates, P.C.
Suite #2470
3435 Wilshire Blvd.
Los Angeles
CA
90010
US
|
Family ID: |
37911194 |
Appl. No.: |
11/245810 |
Filed: |
October 7, 2005 |
Current U.S.
Class: |
404/26 |
Current CPC
Class: |
E02D 29/124 20130101;
E02D 29/14 20130101 |
Class at
Publication: |
404/026 |
International
Class: |
E02D 29/14 20060101
E02D029/14 |
Claims
1. A height adjustable manhole comprised of; a manhole cover with
handle cam lock that is comprised of a handle, a cam, a cam shaft,
and a cam lock box; and an outer-manhole pipe equipped with
pluralities of concave arc band shape blades of same size, whose
outer diameter is equal to the inner diameter of the outer pipe and
inner diameter is 1 mm larger than the outer diameter of the inner
pipe and center of each piece of the concave arc band shape blade
locates 60 degrees apart from the neighboring concave arc band
shape blade's center and a groove to guide a protrusion of a convex
arc band shape blade is developed along the upper surface of each
concave arc band shape blade and a dimple of the similar size of
the protrusion is developed at the center of the groove to hold the
position of the protrusion when the arc shape blades of an
inner-manhole pipe and outer manhole pipe are overlapped and a
flange with pluralities of flange holes is developed at the middle
of outside thereof; and an inner-manhole pipe equipped with a
flange that has an opening to receive the cam shaft and pluralities
of convex arc band shape blades of same size, whose inner diameter
is equal to the outer diameter of the inner-manhole pipe and outer
diameter of the annular plate is 1 mm smaller than the inner
diameter of the outer-manhole pipe and center of each piece of the
convex arc band shape blade locates 60 degrees apart from the
neighboring blade's center and a small protrusion is developed at
the center of the lower surface of each convex arc band shape
blades; and a support pipe that is comprised of two equal
hemi-pipes, one end of each hemi-pipe is connected by two male
connectors and two female connectors developed on each other
hemi-pipe and the other ends of the hemi-pipes are connected by a
key and a key hole and is installed between the top of the
outer-manhole pipe and the bottom of the flange of the
inner-manhole pipe.
2. A height adjustable manhole of claim 1, wherein three pieces of
convex arc band shape blades of same size are horizontally located
along the outer surface of the inner manhole pipe in one layer and
three pieces of concave arc band shape blades are horizontally
located along the inner surface of the outer manhole pipe in one
layer.
3. A height adjustable manhole of claim 1, wherein the
inner-manhole pipe move vertically freely when a space between the
two neighboring convex arc shape blade is occupied by a concave arc
shape blade,
Description
FIELD OF INVENTION
[0001] Current application is related with a road installing
manhole, especially related with an easy installation and height
adjustable manhole comprised of four parts.
BACKGROUND OF THE INVENTION
[0002] Most of manhole is comprised of one main steel pipe and one
cover. Once the manhole is installed on the street over sewage line
and many other facilities for city life, the position of the
manhole cover from the base of the pavement or from the outer
surface of the huge construction of a sewage line is fixed.
However, due to the severe weather conditions such as extreme
temperature change and rains, there develop creeks between the
manholes and the road surface surrounding them. Those creeks are
not only very dangerous for cars and pedestrians passing by the
area. Most local authorities spend lots of their budget to cover up
those creeks. The best way is to pave the whole road of that area
and paint the lines. But, as the pavements are repeated, the
surface of the road reaches well above the cover of the manhole. To
avoid such situation, road workers must dig out the whole manhole
structure and re-install it based on the new surface of the
road.
[0003] Many kinds of height adjustable manholes and manhole covers
are introduced. Most of those height adjustable manholes utilize
screw type support and/or male screw threads developed on the outer
surface of the inner pipe combined with female screw threads
developed on the inner surface of the outer pipe or support.
[0004] However, due to the environment of the places where the
manholes are located, it is not an easy procedure to install and
re-adjust the height of those screw shape manholes. First of all,
the workers must align both of the male and female threads in
correct position, engage them and turn the manhole pipe to the
desired position. Contaminants, such as sand and metal can stuck
between the screw threads make it hard to turn the manhole pipe.
Once a manhole is installed on the road, it usually takes at least
from couple of months to many years. The moistures from the under
ground water and surface water easily corrodes the screw threads
and make them stick together. Then it needs extra effort to
eliminate the corrodes from the threads.
[0005] It is purpose of the current application to provide a
manhole that can adjust a height from the cover to the road surface
without not only digging out the whole structure from the place
where it was buried, but also without extra effort of turning the
inner manhole until the desired position is reached. The structure
of the manhole of current application enables an easy installation
and easy adjustment of the height of the manhole cover from the
basin structure of sewage treatment system buried underground.
DESCRIPTION OF THE PRIOR ART
[0006] U.S. Pat. No. 6,698,973 and 6,179,518 to Suatac illustrates
an adjustable manhole cover frame assembly suitable for mounting on
a manhole basin upper section has an outer ring, capable of resting
on the top surface of the upper section, and an inner ring engaging
the outer ring by screw threads and having support for a manhole
cover. It is like screw cap.
[0007] U.S. Pat. No. 6,311,433 to Zdroik illustrates an adjustable
manhole/catch basin structure includes a mounting base, adjustable
tube, and protection sleeve. The adjustable manhole (1) is
installable only onto a concrete lateral (100) by fixing the
position with mortar (102).
[0008] U.S. Pat. No. 5,095,667 to Ryan, et al. illustrates a
telescopic manhole or storm drain installation includes a riser
assembly provided with an upper section and adjacent lower section
the former of which comprises a side wall defining an inverted
frustoconical configuration while the latter provides a vertically
disposed member having external threads cooperating with a
stationary threaded collar.
[0009] U.S. Pat. No. 4,075,796 to Cuozzo illustrates a manhole
consists primarily of a cast and internally threaded main body,
which receives a cast and internally threaded sleeve, which may be
raised to different pavement levels by means of a removable spanner
wrench. It includes a pair of diametrically opposed and slidable
locking plates, which have pin means on the underside for being
received within openings on the upper interior of the sleeve, and
the upper portion of the plates projects outwards of the sleeve, so
as to lock the sleeve and cover within the main body, thus
preventing rotation thereof, the plates when the sleeve is lowered
or elevated, serving as a means of rendering the sleeve and cover
stationary at various pavement levels.
[0010] U.S. Pat. No. 3,629,981 to Mc Caffery illustrates an
adjustable height assembly for supporting a cover over a
subterranean access opening wherein a cylindrical frame structure
having interior coaxial acme threads is adopted to be permanently
located in non-rotatable submerged position.
[0011] U.S. Pat. No. 3,533,199 to Pickett illustrates a manhole
structure comprising a first substantially cylindrical frame member
adapted to be disposed underground structure and a second
substantially cylindrical frame member adjustably and telecopy
disposed with respect to the first frame member adapted to extend
upwardly an adjustable distance to the surface of the ground.
[0012] None of the prior art teaches to provide a height adjustable
manhole system that enables an easy installation and height
adjustment without utilizing screw threads system shown in the
present application.
SUMMARY OF THE INVENTION
[0013] The manhole of current application is comprised of an
outer-manhole pipe, an inner-manhole pie, a manhole cover, and a
support pipe. Three concave arc band shape blades are horizontally
located along the inner surface of the outer-manhole pipe in one
layer. Five layers of concave arc shape blades, placed with same
distance, are aligned to form three vertical columns of blades.
Three convex arc band shape blades are horizontally located along
the outer surface of the inner manhole pipe. Five layers of convex
arc shape blades, placed with same distance, are aligned to form
three vertical columns of blades. Size of all the arc band blades
is the same. The size of the space between the two neighboring
concave blades is the same as the size of a convex blade. When a
space between the two neighboring concave blade is occupied by a
convex blade, the inner-manhole pipe can move vertically freely.
Once a desired vertical position of the inner-manhole pipe is
reached, workers turn the inner-manhole pipe horizontally 60
degrees and put down the pipe. Then the concave and convex arc
shape blades overlap each other. To separate the two pipes, lift up
the inner-pipe slightly, turn 60 degrees horizontally and pull up
the inner-pipe. The support pipe is engaged between the top flange
of the inner-manhole pipe and top end of the outer manhole pipe to
hold and support the distance between them. The structure of the
manhole of current application enables an easy installation and
easy adjustment of the height of the manhole cover from the basin
structure of sewage treatment system.
BRIEF DESCRIPTION OF THE DRAWINGS
[0014] FIG. 1 is a perspective view of a height adjustable manhole
of the current application.
[0015] FIG. 2 is a perspective view of a manhole cover with handle
cam lock for the height adjustable manhole of the current
application.
[0016] FIG. 3 is a perspective view of a handle cam lock of the
manhole cover when handle is in upward position and is in down
position.
[0017] FIG. 4 is a perspective view of an inner-manhole pipe
equipped with a flange.
[0018] FIG. 5 is a perspective view of a section `A` in FIG. 1,
showing arrangement of the convex arc band shape blades.
[0019] FIG. 6 is a perspective view of the outer- manhole pipe
showing the inner surface of the pipe.
[0020] FIG. 7 is a perspective view of a section `B` in FIG. 6,
showing arrangement of the concave arc band shape blades.
[0021] FIG. 8 is a perspective view of a support pipe.
[0022] FIG. 9 is a perspective view of the support pipe installed
on the outer- manhole pipe.
[0023] FIG. 10 is a vertical cross sectional view of the height
adjustable manhole of the current application assembled.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0024] FIG. 1 is a perspective view of a height adjustable manhole
(1) of the current application. The manhole (1) is comprised of an
outer-manhole pipe (2), an inner-manhole pipe (3), a manhole cover
(4), and a support pipe (5).
[0025] FIG. 2 is a perspective view of a manhole cover (4) with
handle cam lock (6) for the height adjustable manhole (1) of the
current application. FIG. 3 is a perspective view of a cam lock (6)
of the manhole cover (4). FIG. 4 is a perspective view of an inner-
manhole pipe (3) equipped with a flange (7). The flange (7) has an
opening (8) to receive cam shaft (9). When the handle (10) of the
cam lock (6) is vertically upward, the cam shaft (9) is placed in
down part of the cylindrical cam hole (11) due to the shape of cam
(12). When the handle (10) of the cam lock (6) is laid down and
inserted into the cam lock box (13), the camshaft (9) is placed in
the upper part of the cam hole (11).
[0026] To close the manhole cover (4), a worker picks up the handle
(10) in up right position to the cover (4) and insert the cam shaft
(9) through the opening (8). Turn the cover 90 degrees horizontally
to move the cam shaft (9), which is now located under the cover
(4), to a position perpendicular to the opening (9). Press down the
handle (10) into the cam lock box (13). Then the cam shaft (9)
moves up ward in the cam hole (11) and lock the manhole cover (4)
by adhering the shaft (9) to the underneath side of the flange (7).
Rubber packing may be installed between the manhole cover (4) and
the flange (7).
[0027] FIG. 4 and FIG. 5 show the inner-manhole pipe and the
arrangement of convex arc band shape blades (14). The arc band
shape blades are prepared from annular plates of same size. The
inner diameter of the annular plate is equal to the outer diameter
of the inner-manhole pipe (3) and outer diameter of the annular
plate is 1 mm smaller than the inner diameter of the outer-manhole
pipe (2). Each annular plate is divided into six pieces of same
size. On a circular plane, center of each piece of the convex arc
band shape blade (14) locates 60 degrees apart from the neighboring
blade's (14') center. A small protrusion (14-1) is developed at the
center of the lower surface of each convex arc band shape blades
(14). As shown in FIG. 4 and FIG. 5, three pieces of convex arc
band shape blades (14) are horizontally located along the outer
surface of the inner manhole pipe (3) in one layer. Each blade (14)
is located with same space (15) from the neighboring blade. The
size and shape of the space between the neighboring blades (14) are
same as the blade. Three to five layers of convex arc shape blades
(14), placed with same distance (16), are aligned to form three
vertical columns (17) of blades. Size of all the arc band blades is
the same. The size of the space (15) between the two neighboring
convex blades is the same as the size of a convex blade. When a
space between the two neighboring convex blade is occupied by a
concave blade, the inner-manhole pipe can move vertically
freely.
[0028] FIG. 6 is a perspective view of the outer-manhole pipe
showing the inner surface of the pipe. FIG. 7 is a perspective view
of a section `B` in FIG. 6, showing arrangement of the concave arc
band shape blades. The inner diameter of the annular plate is 1 mm
larger than the outer diameter of the inner-manhole pipe (3) and
outer diameter of the annular plate is equal to the inner diameter
of the outer-manhole pipe (2). On a circular plane, center of each
piece of the concave arc band shape blade (18) locates 60 degrees
apart from the neighboring blade's (18') center. As shown in FIG. 6
and FIG. 7, three pieces of concave arc band shape blades (18) are
horizontally located along the inner surface of the outer manhole
pipe (2) in one layer. A groove (18-1) to guide the protrusion
(14-1) of the convex arc band shape blade (14) is developed along
the upper surface of each concave arc band shape blade (18) and a
dimple (18-2) of the similar size of the protrusion (14-1) is
developed at the center of the groove (18-1) to hold the position
of the protrusion (14-1) when the arc shape blades of the
inner-manhole pipe and outer manhole pipe are overlapped.
[0029] Each blade (18) is located with same space (19) from the
neighboring blade. The size and shape of the space (19) between the
neighboring concave arc shape blades (18) are same as the blade.
Three to five layers of concave arc shape blades (18), placed with
same space (19), are aligned to form three vertical columns (20) of
concave arc shape blades. The size of the space (19) between the
two neighboring concave blades (18) is the same as the size of a
convex blade. When a space between the two neighboring concave
blade (18) is occupied by a convex blade (14), the inner-manhole
pipe can move vertically freely. A flange (21) with pluralities of
flange holes (22) is developed at the middle of the outer-manhole
pipe (2) along the outer surface thereof to fix the pipe to the
ground or to a structure underneath of the manhole (1).
[0030] When a worker installs a manhole, he/she aligns the blades
of the inner-manhole pipe (3) and outer-manhole pipe (2) to be
positioned in sequence on an imaginary circular plane that is
parallel to the horizontal surface. Then push down the
inner-manhole pipe (3) to the depth of desired and rotate the
inner-manhole pipe 60 degrees horizontally. The grooves (18-1)
developed on the concave arc band shape blades (18) guide the
protrusions (14-1) to rotate steadily in a circular motion. In this
position, the concave arc band shape blade (18) and convex arc
shape band blades (14) overlap each other. The protrusions (14-1)
and the dimples (18-2) meet. Push down the inner-manhole pipe (3)
to engage the protrusions (14-1) to the dimples (18-2).
[0031] FIG. 8 is a perspective view of a support pipe (5) for the
manhole (1) of the current application. The support pipe (5) is
comprised of two equal hemi-pipe (25). One end of each hemi-pipes
(25) are connected by two male connectors (26) and two female
connectors (27) developed on each other hemi-pipe. The other ends
of the hemi-pipes (25) are connected by a key (28) and key hole
(29).
[0032] FIG. 9 is a perspective view of the support pipe (5)
installed on the outer-manhole pipe (2). The height (24) of the
support pipe (5) is tailored to the distance between the top of the
outer-manhole pipe (2) and the bottom of the manhole cover (4). The
role of this support pipe (5) is preventing soil from getting into
the space between the top of the outer-manhole pipe (2) and the
bottom of the manhole cover (4) to stick between the concave arc
band shape blade (18) of the outer-manhole pipe (2) and convex arc
shape band blades (14) of the inner-manhole pipe (3).
[0033] FIG. 10 is a vertical cross sectional view of the height
adjustable manhole (1) of the current application assembled showing
how the four parts are assembled. The outer-manhole pipe (2) with
flange (21) received the inner-manhole pipe (3). The concave arc
band shape blades (18) of the outer-manhole pipe (2) and the convex
arc band shape blades (14) are over-lapped and engaged each other
via the protrusion (14-1) of the convex arc band shape blades (14)
and the dimple (18-2) of the concave arc band shape blades (18).
The support pipe (5) is installed between the top of the
outer-manhole pipe (2) and the bottom of the flange (7) of the
inner-manhole pipe (3). The handle (10) of the cam lock of the
manhole cover (4) is in open position.
[0034] The noble structure of the height adjustable manhole
comprised of four major part of the current application an easy
installation and height adjustment of a manhole buried on a road
surface. Many kind of variation is possible based on this
disclosure.
* * * * *