Elongated-member-driving apparatus – With means to move or guide member into driving position – Magnetic member-feed and/or holding means
Reexamination Certificate
2001-07-19
2002-04-02
Smith, Scott A. (Department: 3721)
Elongated-member-driving apparatus
With means to move or guide member into driving position
Magnetic member-feed and/or holding means
C227S130000
Reexamination Certificate
active
06364192
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a power nailer having a spring biased between a top of an action rod and an inside of a recess of the nailer. The spring prevents the action rod from descending to touch other parts when the nailer is put upside-down.
BACKGROUND OF THE INVENTION
A conventional is shown in FIG.
1
and generally includes casing
1
having an air inlet
10
and a neck
11
in which a piston rod
20
is movably inserted. A sleeve
3
having outer threads
31
is threadedly engaged with the neck
11
and a passage
30
is defined longitudinally through the sleeve
3
so that the piston rod
20
extends in the passage
30
. A slot
33
defined transversely through the sleeve
3
and an action rod
4
is inserted in the passage
30
in the sleeve
3
from a lower end of the sleeve
3
. A bolt
5
is inserted in the slot
33
and engaged with a hole
40
in the action rod
4
so that the action rod
4
is movable within a range of the slot
33
. A tool
6
is inserted in a grove
42
defined in the lower end of the action rod
4
and is fixedly positioned by extending a bolt
45
through a hole
410
in the action rod
4
and engaged with holes
60
in the tool
6
.
When the nailer is put upside-down, the action rod
4
descends because of the gravity and the movement of the action rod
4
will result the descent of the piston rod
20
which could activate an automatic operation mold without notice of the users. This could lead to a dangerous situation.
SUMMARY OF THE INVENTION
In accordance with one aspect of the present invention, there is provided a nailer which comprises a casing having an air inlet and a neck. A piston device is movably received in the casing and a piston rod extends through the neck. A sleeve is engaged with the neck and a passage is defined longitudinally through the sleeve for the piston rod movably received therein. A slot is defined through a wall of the sleeve and communicates with the passage. An action rod has a first end thereof inserted in the passage from a lower end of the sleeve and a hole is defined through the action rod. A pin extends through the slot and the hole. A spring has an end contacting the first end of the action rod and the other end of the spring contacts a flange extending from an inside of the neck.
The primary object of the present invention is to provide a nailer wherein the action rod will not descend to touch other parts in the casing when the nailer is put upside-down.
The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention.
REFERENCES:
patent: 3438449 (1969-04-01), Smith
patent: 3813993 (1974-06-01), Smith
patent: 5074453 (1991-12-01), Tachihara et al.
patent: 6095394 (2000-08-01), Wang-Kuan
patent: 6138888 (2000-10-01), Liao
patent: 6193127 (2001-02-01), Huang
Baxley Charles E.
Smith Scott A.
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