Joints and connections – Member ends joined by inserted section – Laterally inserted section
Reexamination Certificate
2000-12-13
2002-07-23
Novosad, Christopher J. (Department: 3671)
Joints and connections
Member ends joined by inserted section
Laterally inserted section
C403S309000, C403S317000, C403S318000, C403S319000, C403S359500, C403S359600, C403S375000, C030S254000, C030S329000, C030S341000
Reexamination Certificate
active
06422780
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention is related to a structure for connecting a tool with a grip. The connecting structure includes an insertion rod which is easily detachably inserted in and connected with an outer sheath. In addition, the connecting structure is not subject to rusting and free from clogging.
FIGS. 6 and 7
show a conventional gardening tool. In order to elongate the length of the gardening tool, save application force and replaceably connect the tool with the grip
9
, a tool stem
91
of the tool is fitted into a sleeve
92
of the grip
9
to increase the length of the tool. The sleeve
92
is formed with a dent
93
. A spring
94
and a pushing pin
95
pushed by the spring
94
are disposed in the dent
93
. When the sleeve
92
is inserted into the grip
9
, the pushing pin
95
is inserted and engaged in a fixing hole
96
of the grip
9
. However, the spring
94
is made of iron material and is subject to rusting. As a result, the rust tends to clog the dent
93
and makes it uneasy to push out or press in the pushing pin
95
. Therefore, it will be difficult to connect the sleeve
92
with the grip
9
or disconnect the sleeve
92
from the grip
9
. Also, it often takes place that the pushing pin
95
cannot be pushed out by the spring
94
and the grip
9
is detached from the sleeve
92
.
SUMMARY OF THE INVENTION
It is therefore a primary object of the present invention to provide a structure for connecting a tool with a grip. The outer sheath is formed with a split in which the projecting block of the insertion rod is inserted. A periphery of the outer sheath is formed with an annular groove corresponding to the transverse recess of the projecting block. The inner circumference of the fastening ring is formed with an annular rib fitted in the annular groove. The rib is formed with a dent having a width slightly larger than the width of the split. When rotating the fastening ring, the rib is engaged in the transverse recess of the projecting block to restrict the insertion rod from displacement. When the dent of the rib is aligned with the transverse recess of the projecting block, the projecting block can be passed therethrough, permitting the insertion rod to be extracted out of the outer sheath.
The present invention can be best understood through the following description and accompanying drawings wherein:
REFERENCES:
patent: 2408567 (1946-10-01), Mauch
patent: 2966931 (1961-01-01), Dreier
patent: 3621899 (1971-11-01), Hula
patent: 3922784 (1975-12-01), Prince et al.
patent: 4092918 (1978-06-01), Hamisch, Jr.
patent: 4304426 (1981-12-01), Francis
patent: 4400878 (1983-08-01), Vaudreuil
patent: 4738446 (1988-04-01), Miles
patent: 4777725 (1988-10-01), Hirsch
patent: 5454165 (1995-10-01), Thompson et al.
patent: 5575071 (1996-11-01), Phillips et al.
patent: 5657541 (1997-08-01), Hickok et al.
patent: 6045292 (2000-04-01), Placide et al.
Novosad Christopher J.
Rosenberg , Klein & Lee
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