Textiles: braiding – netting – and lace making – Apparatus – Shuttles – carriages and/or threading and loading or...
Reexamination Certificate
2003-03-07
2004-11-02
Calvert, John J. (Department: 3765)
Textiles: braiding, netting, and lace making
Apparatus
Shuttles, carriages and/or threading and loading or...
C087S022000
Reexamination Certificate
active
06810785
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a strand feeding device, more particularly to a strand feeding device for a coaxial cable braiding apparatus.
2. Description of the Related Art
Referring to
FIGS. 1 and 2
, a conventional strand feeding device
1
for a coaxial cable braiding apparatus is shown to include: a seat body
11
extending in a longitudinal direction and having a top end
110
″ defining a top end face
110
, a mounting bore
112
extending inwardly and downwardly from the top end face
110
in the longitudinal direction, and a side face formed with a slot
113
that extends in the longitudinal direction and that is in spatial communication with the mounting bore
112
; a bobbin-mounting post ill extending uprightly from the top end face
110
in the longitudinal direction; a bobbin
13
sleeved rotatably around the bobbin-mounting post
111
and having a lower end formed with a plurality of angularly spaced apart engaging grooves
114
, each of which is confined by a groove-defining wall
115
that has a flat wall portion
115
F; and a limiting member
15
including a spring biased rod
152
disposed movably in the mounting bore
112
, and a protrusion
153
extending outwardly and transversely from the rod
152
through the slot
113
. The rod
152
has a top portion formed with a flat abutment surface
152
F that is vertically aligned with a selected one of the engaging grooves
114
in the lower end of the bobbin
13
. The rod
152
is movable in the longitudinal direction between an upper position, in which the top portion of the rod
152
extends into the selected engaging groove
114
and the flat abutment surface
152
F of the rod
152
abuts against the flat wall portion
115
F of the groove-defining wall
115
of the selected engaging groove
114
so as to prevent rotation of the bobbin
13
relative to the bobbin-mounting post
111
, and a lower position, in which the top portion of the rod
152
retracts into the mounting bore
112
and disengages from the selected engaging groove
114
so as to permit rotation of the bobbin
13
relative to the bobbin-mounting post
111
. An urging member
151
is disposed in the mounting bore
112
for urging the rod
152
to move to the upper position. A swinging arm
14
is pivoted to the seat body
11
through a pivot shaft, and is disposed adjacent to the protrusion
153
of the rod
152
. The swinging arm
14
is turnable about the pivot shaft between a released position, in which the swinging arm
14
presses the protrusion
153
against urging action of the urging member
151
to move the rod
152
to the lower position, and a locking position, in which the swinging arm
14
moves away from the protrusion
153
so as to permit restoring of the rod
152
to the upper position by the urging action of the urging member
151
.
One disadvantage of the aforesaid conventional strand feeding device
1
resides in that when the rod
152
is moved to the upper position, the flat abutment surface
152
F of the rod
152
fully abuts against the flat wall portion
115
F of the groove-defining wall
115
of the aligned engaging groove
114
to prevent rotation of the bobbin
13
relative to the bobbin-mounting post
111
. As a result, a relatively large amount of friction is present between the rod
152
and the bobbin
13
that tends to expedite wearing of the groove-defining wall
115
and that consequently shortens the service life of the conventional strand feeding device
1
.
SUMMARY OF THE INVENTION
Therefore, the object of this invention is to provide a strand feeding device for a coaxial cable braiding apparatus, which includes a rod with a rounded surface, that is capable of overcoming the aforesaid drawback of the prior art.
A strand feeding device for a coaxial cable braiding apparatus according to the present invention includes: a seat body extending in a longitudinal direction, and having a top end defining a top end face, a mounting bore extending inwardly and downwardly from the top end face in the longitudinal direction, and a side face formed with a slot that extends in the longitudinal direction and that is in spatial communication with the mounting bore; a bobbin-mounting post extending uprightly from the top end face of the seat body in the longitudinal direction; a bobbin sleeved rotatably around the bobbin-mounting post and having a lower end formed with a plurality of angularly spaced apart engaging grooves, each of which is confined by a groove-defining wall; a limiting member including a spring-biased rod disposed movably in the mounting bore and a protrusion extending outwardly and transversely from the rod through the slot, the rod having a top portion that has a rounded surface and that is vertically aligned with a selected one of the engaging grooves in the lower end of the bobbin, the rod being movable in the longitudinal direction between an upper position, in which the top portion of the rod extends into the selected one of the engaging grooves and the rounded surface of rod abuts against the groove-defining wall of the selected one of the engaging grooves so as to prevent rotation of the bobbin relative to the bobbin-mounting post, and a lower position, in which the top portion of the rod retracts into the mounting bore and disengages from a vertically aligned one of the engaging grooves so as to permit rotation of the bobbin relative to the bobbin-mounting post; an urging member disposed in the mounting bore for urging the rod to move to the upper position; and a swinging arm pivoted to the seat body through a pivot shaft that extends in a transverse direction relative to the slot. The swinging arm is disposed adjacent to the protrusion of the rod, and is turnable about the pivot shaft between a released position, in which the swinging arm presses the protrusion against urging action of the urging member to move the rod to the lower position, and a locking position, in which the swinging arm moves away from the protrusion so as to permit restoring of the rod to the upper position by the urging action of the urging member.
REFERENCES:
patent: 3686997 (1972-08-01), Strangfeld et al.
patent: 5370031 (1994-12-01), Koyfman et al.
patent: 5383387 (1995-01-01), Chesterfield et al.
patent: 5520084 (1996-05-01), Chesterfield et al.
patent: 5732611 (1998-03-01), Voyer et al.
patent: 5904087 (1999-05-01), Freitas et al.
patent: 6450078 (2002-09-01), Frank et al.
Calvert John J.
Hurley Shaun R
LandOfFree
Strand feeding device for a coaxial cable braiding apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Strand feeding device for a coaxial cable braiding apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Strand feeding device for a coaxial cable braiding apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3356616