IP Forensics, LLC v. Colt's Manufacturing Company LLC

Filing 1

COMPLAINT against Colt's Manufacturing Company LLC ( Filing fee $ 350 receipt number 0540-3056109.), filed by IP Forensics, LLC. (Attachments: # 1 Exhibit, # 2 Exhibit, # 3 Exhibit, # 4 Exhibit, # 5 Exhibit, # 6 Civil Cover Sheet)(Konczal, Michael)

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4,754,689

of a conventional design and is removable to facilitate
disassembly of the pistol 10. Plug 42 is formed with a
cavity 48 which receives two concentric counterwound springs 50 and 52 that seat against the base 54 of
the cavity 48. The slide 20 embodies a U shape edge 5
surface 56 and it is this surface that would normally
engage an abutment on the frame 12 to terminate the
recoil stroke of the slide 20. A combination spring guide
and buffer, generally indicated at 58, is mounted in a U
shaped cavity 60 in the frame 12. Cavity 60 is formed 10
with the typical upwardly facing opening and a transverse shoulder or abutment 62 adjacent the rear sidewalls of the cavity 60. Cavity 60 communicates with a
smaller U shaped cavity 63 to the left of abutment 62.
The spring guide 58 is generally constituted by a head 15
segment, generally indicated at 64, against which the
springs 50 and 52 are seated and a guide rod segment,
generally indicated at 66 about which the springs 50 and
52 are coiled. The spring guide 58 is preferably made
virtually entirely of a plastic resilient material which has 20
energy absorbing capabilities. An acetal resin thermo
plastic polymer made by the polymerization of formaldehyde is a suitable material. Such a material is manufactured by E.I. dupont de Numours & Co. and is sold
under the trademark Delrin. Obviously, other plastic 25
materials would also be suitable for the spring guide.
With particular reference to FIGS. 2 and 3, wherein
the spring guide 58 is shown per se, it will be seen that
the head segment 64 of the spring guide 58 is constituted
by rear and front enlarged diameter portions 68 and 70. 30
The upper surface of the front enlarged diameter portion 70 has a central concave area adjoining convex side
areas. A circumferential recess 72 is dermed between
the enlarged diameter portions 68 and 70 in such a manner that a rearwardly extending semicircular lip 74 in 35
defined with a rear surface 75 perpendicular to the axis
of the spring guide. A metal plate 76 (FIGS. 4 and 5)
having a shape similar to that of the front enlarged
diameter portion 70, but with a centrally located opening 78 therein, is received within the recess 72 such that 40
the reduced diameter section of head segment 64 extends through the opening 78. The rear surface of the
plate 76 lies flush with that of the lip 74. As should be
evident from FIGS. 2 and 3, the rear enlarged diameter
portion 68 of the head segment 64 is cylindrical and is 45
smaller then the enlarged diameter portion 70, whereby
the outer peripheral rear surface of the plate 76 is exposed. From FIG. 2, it will be seen that the guide rod
segment 66 is hollow so as to facilitate the molding
process. The lip is formed and molded with a radius to 50
match a like radius in the abutting receiver area,
whereby the metal plate will not engage the radius and
cause stress concentrations in the frame.
The phantom lines in FIG. 2 best illustrate the disposition of the spring guide 58 to the frame 12. The cylin- 55
drical enlarged head portion 68 serves merely as a locator and is received within the cavity 63. It is the rear
peripheral surface of the plate 76 and the rear lip 75
which engage the shoulder 62. The springs 50 and 52
are, of course, seated against the front face of the en- 60
larged diameter portion 70, thereby urging the rear
peripheral surface of the plate 76 and rear surface 75 of
the lip 74 firmly against the shoulder.
As recoil terminates, the U-shaped surface 56 of the
slide 20 slams into the front face of the enlarged diame- 65
ter portion 70. Such an impact will tend to compress the
enlarged diameter portion 70. However, the plate 76
will cause an even distribution of the pressure acting

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upon the rear face of enlarged diameter portion 70 and
thereby prevent its deformation. Although the impact
of the slide 20 on the front face will not be evenly distributed thereover, it has been found that no unacceptable deformation of deteriation will result therefrom.
The spring guide shown in FIGS. 1-3 is integrally
molded with the metal plate 76 therein. Alternatively,
the spring guide can be readily assembled from discrete
components as is depicted in the exploded view of FIG.
6. In FIG. 6 parts identical to those previously described have like numerals and similar parts carry like
primed numerals. As shown in FIG. 6, the cylindrical
enlarged diameter portion 68' carries a projecting centrally disposed shaft 80 having a tapered land 82 (which
may be tapered or cylindrical) thereupon for extending
through the opening 78 in the metal plate. The land 82
could also take the form of a tab. The guide rod segment
has a cylindrical opening 84 therein which communicates with a smaller cylindrical opening 86 in the enlarged diameter portion 70' to thereby define an engagment surface 88 which the rear of the land 82 abuts
when snap fitted therein with the metal plate positioned
in the recess. This form of construction would typically
be less expensive than that previously described and
would involve only three parts.
Obviously, many modifications and variations are
possible in light of the above teachings without departing from the scope or spirit of the invention as herein
dermed in the appended claims.
I claim:
1. In a semi-automatic pistol of the type having a
frame with a U-shaped cavity with a transversely extending shoulder and a ssmall U-shaped cavity to the
rear of the shoulder; a barrel mounted on the frame; a
slide mounted on the frame in surrounding relationship
to the barrel for reciprocating movement between rearward recoil and forward battery positions; and an action
spring seated in the slide, an improved spring guide and
buffer comprising:
an elongated plastic guide rod segment having an
axis;
a plastic head segment having rear and front enlarged
diameter portions joined by a reduced diameter
section and a circumferential recess defined between the rear and front enlarged diameter portions such that a rearwardly extending, semicircular lip with a rear surface perpendicular to the axis
of the guide rod segment is defined on the front
enlarged diameter portion; the front enlarged diameter portion having an upper surface with a
central concave area adjoined by two convex side
areas; the rear enlarged diameter portion being
smaller than the front enlarged diameter portion
and having a cylindrical shape;
a metal plate having a front surface, a rear surface, an
outer peripheral edge with a shape generally similar to that of the front enlarged diameter portion
and a centrally located opening therein extending
between the front and rear surfaces thereof, the
metal plate being received in the recess such that
the reduced diameter section of the head segment is
received within the centrally located opening and
the rear surface of the metal plate is flush with the
rear surface of the lip; and the rear enlarged diameter portion being a locator and mounted within the
smaller U-shaped cavity, the front enlarged diameter portion and the guide rod segment being
mounted in the first mentioned U-shaped cavity

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