U.S. patent application number 10/304678 was filed with the patent office on 2004-05-27 for small-size grease gun.
Invention is credited to Chen, Li Chen.
Application Number | 20040099484 10/304678 |
Document ID | / |
Family ID | 32325278 |
Filed Date | 2004-05-27 |
United States Patent
Application |
20040099484 |
Kind Code |
A1 |
Chen, Li Chen |
May 27, 2004 |
Small-size grease gun
Abstract
A small-size grease gun includes a hollow main body, a grease
nipple connected to a front end of the main body, a push rod
elastically movably disposed in the main body, and a cylindrical
grease container screwed to a sleeve vertically extended from a top
of the main body. A rear section of the push rod is projected from
a rear open end of the main body to connect to a knob. The grease
container has a hold-down disc positioned therein and being
normally pushed downward by a spring fixed to a lower side of a top
cover of the grease container. An amount of grease filled in the
grease container is forced into the main body by the hold-down
disc. By pushing the rear section of the push rod into the main
body, the grease is compressed to inject into a small-size
pneumatic tool via the grease nipple.
Inventors: |
Chen, Li Chen; (Taichung
Hsien, TW) |
Correspondence
Address: |
ROSENBERG, KLEIN & LEE
3458 ELLICOTT CENTER DRIVE-SUITE 101
ELLICOTT CITY
MD
21043
US
|
Family ID: |
32325278 |
Appl. No.: |
10/304678 |
Filed: |
November 27, 2002 |
Current U.S.
Class: |
184/105.2 |
Current CPC
Class: |
F16N 3/08 20130101; F16N
3/12 20130101 |
Class at
Publication: |
184/105.2 |
International
Class: |
F01M 011/04 |
Claims
What is claimed is:
1. A small-size grease gun, comprising: a hollow main body having a
conical grease nipple connected to a front end thereof, a sleeve
vertically extended from a top of said main body, and a push rod
movably associated with said main body; said push rod including a
front section that is received in a hollow space defined by said
main body with a first spring put thereon, and a rear section that
is projected from a rear open end of said main body to connect at a
rear end to a knob; and a cylindrical grease container having a
locking neck portion provided at a lower end thereof for screwing
onto said sleeve of said main body; a hold-down disc having an
O-ring mounted around an outer peripheral edge thereof being
positioned in said grease container, and a top cover having a
second spring fixed to a lower side thereof being closed onto an
upper open end of said grease container, such that said second
spring normally pushes said hold-down disc downward; Whereby when
said hold-down disc is positioned into and said top cover is closed
onto said grease container after the latter is filled with an
amount of grease, said second spring pushes said hold-down disc
downward to force said grease into said main body via said sleeve;
and when said rear section of said push rod is pushed into said
main body, said grease in said main body is compressed to inject
into a small-size pneumatic tool via said grease nipple.
Description
BACKGROUND OF THE INVENTION
[0001] The present invention relates to a small-size grease gun,
and more particularly to a grease gun specially designed for
conveniently and quickly injecting grease into a small-size
pneumatic tool.
[0002] Most of the currently commercially available grease guns are
designed for greasing a large-scale machine table but not suitable
for greasing small-size pneumatic tools. Therefore, operators of
small-size pneumatic tools often have troubles in maintaining or
repairing such small pneumatic tools due to lack of suitable grease
guns.
SUMMARY OF THE INVENTION
[0003] A primary object of the present invention is to provide a
small-size grease gun suitable for injecting grease into small-size
ball bearings of a pneumatic tool, so that the pneumatic tool could
be maintained in a more convenient and quick manner.
[0004] To achieve the above and other objects, the small-size
grease gun of the present invention mainly includes a hollow main
body, a grease nipple connected to a front end of the main body
with a conical spring and a steel ball disposed between them, a
push rod elastically movably associated with the main body, and a
cylindrical grease container screwed to a sleeve vertically
extended from a top of the main body. A front section of the push
rod is located inside the main body with a spring put thereon, and
a rear section of the push rod is projected from a rear open end of
the main body to connect to a knob. The grease container has a
hold-down disc positioned therein and being normally pushed
downward by a spring fixed to a lower side of a top cover of the
grease container. An amount of grease filled in the grease
container is forced into the main body by the hold-down disc. By
pushing the rear section of the push rod into the main body, the
grease in the main body is compressed to inject into a small-size
pneumatic tool via the grease nipple.
BRIEF DESCRIPTION OF THE DRAWINGS
[0005] The structure and the technical means adopted by the present
invention to achieve the above and other objects can be best
understood by referring to the following detailed description of
the preferred embodiments and the accompanying drawings,
wherein
[0006] FIG. 1 is an assembled perspective view of a small-size
grease gun according to the present invention;
[0007] FIG. 2 is an exploded perspective view of FIG. 1;
[0008] FIG. 3 is a sectional view of FIG. 1; and
[0009] FIG. 4 shows the manner of using the small-size grease gun
of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0010] Please refer to FIGS. 1, 2, and 3 at the same time, in which
a small-size grease gun 100 according to the present invention is
shown. The small-size grease gun 100, as shown, mainly includes a
main body 1 in the form of a hollow tubular member, a grease nipple
2 connected to a front end of the main body 1 with a steel ball 11
and a conical spring 12 disposed between them, a push rod 3 movably
associated with the main body 1, and a cylindrical grease container
7 connected to a sleeve 13 vertically extended from a top of the
main body 1.
[0011] A front section of the push rod 3 is disposed inside the
main body 1 with a spring 4 put thereon, and a rear section of the
push rod 3 is projected from a rear open end of the main body 1
while a cap 5 is put around the push rod 3 to close the rear open
end of the main body 1. A knob 6 is connected to a rear end of the
push rod 3 to enable comfortable pushing and pulling of the push
rod 3 at the knob 6.
[0012] The cylindrical grease container 7 is provided at a lower
end with a locking neck 71 having external threads 711. And, the
sleeve 13 on the top of the main body 1 is provided with internal
threads 131 meshing with the external threads 711 to enable firm
connection of the grease container 7 to the sleeve 13 of the main
body 1 through engagement of the external threads 711 with the
internal threads 131. A hold-down disc 8 having an O-ring 81
mounted around an outer peripheral edge thereof is fitly positioned
in the cylindrical grease container 7. A top cover 9 is closed onto
an upper open end of the grease container 7 with a spring 91
fixedly connected to a lower side of the top cover 9 to normally
push the hold-down disc 8 downward in the grease container 7.
[0013] After the small-size grease gun 100 is assembled from the
above-mentioned components with the locking neck 71 of the grease
container 7 screwed to the sleeve 13 of the main body 1, an amount
of grease may be filled into the grease container 7 before the
hold-down disc 8 is disposed into the grease container 7 and the
top cover 9 is closed onto the upper open end of the grease
container 7. The spring 91 fixed to the lower side of the top cover
9 pushes the hold-down disc 8 downward, forcing the grease in the
grease container 7 into the main body 1 for injection via the
grease nipple 2.
[0014] Please refer to FIG. 4 that shows the manner of using the
small-size grease gun 100 of the present invention. To use the
grease gun 100, first fill the grease container 7 with an amount of
grease. Allow the spring 91 and the hold-down disc 8 to apply a
downward pressure on the grease and thereby forces the same into
the hollow main body 1 via the sleeve 13. And then push the knob 6
toward the main body 1, so that the rear section of the push rod 3
is moved into the main body 1. At this point, the grease in the
main body 1 is compressed to inject into a small-size pneumatic
tool via the grease nipple 2.
[0015] Due to the small size of the grease gun of the present
invention, it is particularly suitable for greasing small-size ball
bearings in general pneumatic tools.
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