Washer supply device on a power nailer

Details Washer supply device on a power nailer Washer supply device on a power nailer

2003-03-18

2003-12-09

Smith, Scott A. (Department: 3721)

Elongated-member-driving apparatus

With means to position 'mating-member' in alignment with driver

Comprising feed means for 'mating-member'

C227S015000, C227S119000, C227S136000

Reexamination Certificate

active

06659326

ABSTRACT:

FIELD OF THE INVENTION
Background of the Invention
A conventional washer supply device for a power nailer
12
is shown in
FIGS. 1 and 2
and generally includes a retaining tube
13
connected to a side of the power nailer
12
and a pushing rod
150
extends through the retaining tube
13
. A spring
15
is connected to the pushing rod
150
and a engaging head
151
is connected to a lower end of the pushing rod
150
. A washer transferring member
14
connected to a nose
120
of the nailer
12
and a tubular casing
11
is engaged between the retaining tube
13
and the washer transferring member
14
. A plurality of washers
10
are piled in the tubular casing
11
and the washers
10
can be transferred to the nose
120
so as to be work with the nails ejected from the nose
120
. The washers
10
are pressed downward by the engaging head
151
and the tubular casing
11
is made of stiff material so that when some of the washers
10
are jammed in the tubular casing
11
, the tubular casing
11
has to be discarded. The tubular casing
11
cannot be reused again so that it is a huge waste and the cost for the tubular casings
11
are expensive.
U.S. Pat. No. 5,163,580 to Beach et al. discloses a roofing washer-dispensing and fastener-driving machine which uses a rigid rod
38
with a head (not numbered) to push the stack of the washers downward. It is to be noted that, the size of the head connected to the rigid rod
38
is limited when compared with the size of the washers so that it has to be positioned in the center of the washers or the washers could be pushed off the central axial direction and cannot be provided as expected. This is important when the size of the washers is smaller than the interior of the magazine.
The present invention intends to provide a washer supply device wherein the pushing rod has an engaging head which is accurately engaged with a groove in a surface of each washer so that the washers are exerted an axial force and are ensured to be pushed along a desired path.
SUMMARY OF THE INVENTION
In accordance with one aspect of the present invention, there is provided a washer supply device and comprises a hollow tubular member connected to a side of a power nailer and an opening is defined longitudinally through the tubular member. A washer transferring member is connected to the power nailer and a lower end of the tubular member is rested on the washer transferring member. A hole is defined through the washer transferring member and communicates with an interior of the tubular member. A cap is connected to a top end of the tubular member and a pushing rod extends through the cap and an engaging head is connected to a lower end of the pushing rod so as to engage with a groove defined in a surface of each washer. A spring is mounted to the pushing rod and located between the cap and the engaging head. A flexible wire frictionally extends through the central holes of the stack of the washers. The washers are received in the tubular member via the opening and the wire is pulled out from the washers via the hole in the washer transferring member.
The primary object of the present invention is to provide a washer supply device wherein the washers are correctly pushed along the axial direction toward the washer transferring member.


REFERENCES:
patent: 3595460 (1971-07-01), Pitkin
patent: 5056684 (1991-10-01), Beach et al.
patent: 6065660 (2000-05-01), Cabrera
patent: 6098442 (2000-08-01), Walldorf et al.
patent: 6273315 (2001-08-01), McGuinness et al.
patent: 6302310 (2001-10-01), Lamb
patent: 6481610 (2002-11-01), Liu et al.
patent: 6543666 (2003-04-01), Huang

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