Solid tire having shock-absorbing blind bores

Details Solid tire having shock-absorbing blind bores Solid tire having shock-absorbing blind bores

2002-12-10

2004-04-13

Stormer, Russell D. (Department: 3617)

Resilient tires and wheels

Tires, resilient

Cushion

C152S005000

Reexamination Certificate

active

06719027

ABSTRACT:

FIELD OF THE INVENTION
The invention relates to a tire, more particularly to a solid tire that has a plurality of axially extending shock-absorbing blind bores.
BACKGROUND OF THE INVENTION
Referring to
FIG. 1
, a conventional solid tire
100
is used in a vehicle for lifting heavy objects and is shown to include an annular rubber tire body
10
which defines a rotating axis
13
and which has a mounting hole
16
, opposite left and right side faces
11
,
12
, and a circumferential ground contacting face
14
interconnecting the left and right side faces
11
,
12
.
As illustrated, each of the left and right side faces
11
,
12
of the tire body
10
is formed with a plurality of annularly arranged and axially extending shock-absorbing blind bores
18
. Each of the blind bores
18
is confined by a bore-defining wall
18
W that includes an inner flat wall portion
183
and a cylindrical wall portion
181
that extends from the inner flat wall portion
183
and that terminates at an opening
185
in the respective one of the left and right side faces
11
,
12
, as best shown in FIG.
2
.
When the tire body
10
of the conventional solid tire
100
is subjected to an impact force when moving over a relatively large groove in the road surface, the blind bores
18
in the left and right side faces
11
,
12
of the tire body
10
will deform in shape to provide a shock-absorbing effect. However, as shown in
FIG. 3
, since a sharp corner is formed between the inner flat wall portion
183
and the cylindrical wall portion
181
of each of the blind bores
18
and since the blind bores
18
are substantially uniform in cross-section from the flat wall portion
183
to the opening
185
, non-uniform deformation of the blind bores
18
will occur during use, which tends to result in cracking of the tire body
10
at the aforesaid corners, thereby shortening the service life of the conventional solid tire
100
.
SUMMARY OF THE INVENTION
The object of this invention is to provide a solid tire that has two side faces formed with a plurality of shock-absorbing blind bores so as to be capable of eliminating the disadvantage of the aforesaid conventional solid tire.
Accordingly, a solid tire of the present invention includes: an annular tire body having opposite left and right side faces and a ground contacting face interconnecting the left and right side faces. Each of the left and right side faces is formed with a plurality of axially extending blind bores. Each of the blind bores has an open end, a closed end opposite to the open end, a reduced section extending inwardly from the open end, and an enlarged section extending from the reduced section to the closed end. The enlarged section reduces gradually in cross-section toward the reduced section and the closed end.


REFERENCES:
patent: 1026468 (1912-05-01), Selzer
patent: 1268298 (1918-06-01), Swartz
patent: 1616843 (1927-02-01), Brubaker

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