Elongated-member-driving apparatus – With means to move or guide member into driving position – Adaptable to dispense different sizes or quantities of members
Reexamination Certificate
2002-12-03
2003-05-20
Smith, Scott A. (Department: 3721)
Elongated-member-driving apparatus
With means to move or guide member into driving position
Adaptable to dispense different sizes or quantities of members
C227S120000
Reexamination Certificate
active
06564985
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a nail driving gun, more particularly to a cartridge assembly that is adapted to be connected to a nail-discharging plate of a nail driving gun and that is adapted to feed nails into a nail-discharging track formed in the nail-discharging plate in a stable manner.
2. Description of the Related Art
In a known nail driving gun, a nail feeding unit aligns a nail from a cartridge assembly with a nail impelling unit so as to discharge the nail via a nail-discharging track.
Referring to
FIGS. 1 and 2
, a conventional nail driving gun
10
is shown to include a gun housing
100
, a nail-discharging plate
101
projecting forwardly from the gun housing
100
and formed with a nail-discharging track
102
extending in a longitudinal direction, and a cartridge assembly connected securely to a rear portion
101
R of the nail-discharging plate
101
for supplying nails in succession into the nail-discharging track
102
.
As illustrated, the cartridge assembly includes a left cartridge half
11
, a right cartridge half
12
, a plurality of urging members
16
, a primary pusher
14
, and a plurality of secondary pushers
15
. The left cartridge half
11
has a left side face
113
formed with a plurality of retention grooves
111
adjacent to the rear portion
101
R thereof and extending in a transverse direction relative to the longitudinal direction. A leading plate
13
is fixed on the left side face
113
of the left cartridge half
11
to form a leading chamber
13
″ therebetween adjacent to a front portion
101
F of the nail-discharging plate
101
. The right cartridge. half
12
is coupled to the left cartridge half
11
, and has a right side face
120
confronting and spaced apart from the left side face
113
to define a nail-receiving chamber
131
in alignment with and in spatial communication with the leading chamber
13
″ (see FIG.
3
). The leading chamber
13
″ and the nail-receiving chamber
131
are in vertical alignment and in spatial communication with the nail-discharging track
102
. The right side face
120
of the right cartridge half
12
is formed with a plurality of spaced apart spring-receiving grooves
121
, each of which extends in the transverse direction and each of which is in spatial communication with a respective one of the retention grooves
111
in the left cartridge half
11
through the nail-receiving chamber
131
. The urging members
16
are respectively disposed in the spring-receiving grooves
121
in the right cartridge half
12
.
The primary pusher
14
is received movably in the leading chamber
13
″, and is connected to a corresponding one of the urging members
16
so as to be urged to move in the transverse direction. Each of the secondary pushers
15
includes a nail-pushing plate
150
disposed in the nail-receiving chamber
131
, and connected to a respective one of the urging members
16
so as to be urged to move in the transverse direction. Each of the nail-pushing plates
150
has a distal portion
150
D extending into a respective one of the retention grooves
111
in the left cartridge half
11
, a front end face
150
F (see FIG.
3
), and a rear end face
150
R that is spaced apart from the front end face
150
F of an adjacent one of the nail-pushing plates
150
to form a gap
13
G (see
FIG. 3
) therebetween.
Referring to
FIGS. 2 and 4
, when a row of nails
20
is placed in the nail-receiving chamber
131
so as to be pushed upward toward the nail-discharging track
102
by the top ends of the pushers
14
,
15
, due to the presence of the gaps
13
G between an adjacent pair of the nail-pushing plates
150
, the nail
20
cannot be properly supported.
SUMMARY OF THE INVENTION
Therefore, the object of this invention is to provide a nail driving gun with a cartridge assembly that is adapted to support nails in a stable manner so as to overcome the aforementioned drawback that is generally associated with the conventional nail driving gun.
Accordingly, a cartridge assembly of the present invention is adapted to be connected to a nail-discharging plate of a nail driving gun for supplying nails into a nail-discharging track formed in the nail-discharging plate. The nail-discharging track extends in a longitudinal direction. The cartridge assembly includes a left cartridge half, a right cartridge half, a plurality of urging members, and a plurality of pushers. The left cartridge half is formed with a left side face. The right cartridge half is coupled to the left cartridge half, and has a right side face confronting and spaced apart from the left side face to define a nail-receiving chamber therebetween. The nail-receiving chamber is adapted to be in vertical alignment and in spatial communication with the nail-discharging track. The right side face of the right cartridge half is formed with a plurality of spaced apart spring-receiving grooves, each of which extends in a transverse direction relative to the longitudinal direction and each of which is in spatial communication with the nail-receiving chamber. The urging members are respectively disposed in the spring-receiving grooves. Each of the pushers includes a nail-pushing plate received movably in the nail-receiving chamber. The nail-pushing plates of the pushers are respectively connected to the urging members so as to be urged by the urging members to move in the transverse direction. Each of the nail-pushing plates has a cross-section extending in the longitudinal direction. The cross-section of each of the nail-pushing plates has a first portion aligned with a respective one of the spring-receiving grooves, and a second portion extending from the first portion in the longitudinal direction between two adjacent ones of the spring receiving grooves.
REFERENCES:
patent: 3834602 (1974-09-01), Obergfell
patent: 5522533 (1996-06-01), Mukoyama et al.
patent: 5632431 (1997-05-01), Lin
patent: 5692665 (1997-12-01), Lee
patent: 5873509 (1999-02-01), Liao
patent: 5934539 (1999-08-01), Lee
patent: 5967396 (1999-10-01), Chuang
patent: 6161746 (2000-12-01), Wey
Christie Parker & Hale LLP
Smith Scott A.
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