3 4
prevents shifting by small forces exerted during handling, FIG. 9 is a cross-section view of a conventional high
the conversion kit according to the present invention pressure syringe without the piston, along with a distal end
includes means for providing a resilient projection on the view thereof. In particular. FIG. 9 shows a high-pressure
inner periphery of the cylindrical guide of the injection syringe body, generally designated by reference numeral 1,
machine corresponding to a recess formed on the outer 5 having a cylinder 2. and a radially outward projecting
periphery of the reducing sleeve, or vice versa. In a particu- peripheral edge 3, in the form of a cylinder handle plate at
larly simple and convenient construction according to the the distal end of the cylinder 2.
present invention, the resilient projection is formed by an FIG. 10 is a cross-section view of a manual syringe
O-ring inserted into a groove formed on the inner periphery without the piston, and a distal end view thereof. In
of the guide or on the outer periphery of the reducing sleeve. 10 particular. FIG. 10 shows a manual syringe body, generally
The reducing sleeve of the conversion kit according to the designated by reference is numeral 4. having a cylinder 5.
present invention is preferably made of plastic, and particu- and a radially outward projecting peripheral edge 6, in the
larly a resilient plastic such as polytetrafluoroethylene, poly- form of a cylinder handle plate at the distal end of the
ester or polyamide. cylinder 5.
The present invention provides several advantages, some 15 As will be readily apparent from FIGS. 9 and 10. one
of which have been mentioned above and others which will difference between the high-pressure syringe body 1, and the
be described in detail with reference to a the drawing figures manual syringe body 4, is that the cylinder 5, of the manual
below. syringe body 4, has both a smaller inner and outer diameter
as compared with the cylinder 2, of the high-pressure
BRIEF DESCRIPTION OF THE DRAWINGS 20 syringe is primarily because the manual syringe
FIG. 1 is a partial diagrammatic view, mainly in cross- is designed for smaller volumes than the high-pressure
section, of an injection machine designed for high-pressure syringe. Consequently, the outer diameter of the piston (not
syringes, and including portions of the conversion kit shown) of the manual syringe is also smaller man the outer
according to the present invention. 25 diameter the piston (not shown) of the high-pressure
FIG. 2 is a cross-section view of the receiving head of a syringe,
conversion vessel for the conversion kit according to one A further difference between high-pressure syringes and
embodiment of the present invention. manual syringes is that the peripheral edge 6, of the manual
FIG. 3 is a perspective view of the bottom of the head of ^ 4' has a shaPe than of TMe
the conversion vessel shown in FIG. 2. i.e. showing the side 3o Puberal 3* of fte high-pressure syringe body 1. As
from which a preferably prefilled manual syringe is inserted shown m nG- 9< me peripheral edge 3. of the high-pressure
into the receiving head. syringe body 1, comprises a ring 7, which has diametrically
„_ . . .. ... , i-*A- opposite flat edges 8. The flat edges 8, interact with the
FIG. 4 is an cross-section view taken along line A—A in vv . x, 6 , . . . 7* * .....
HG. 5 of a reducing sleeve for a conversion kit according to f?*" m *e vessel of w ^wn machine to hold the
the present invention. 35 *frl!>*°«? TM » substantially non-rotatable posi
„ _ . , . tion when inserted into the injection machine, as will be
HG. 5 is a top view of the reducing sleeve shown in FIG. mQfe ^ described below. It is noted that some high
4, i.e. showing the side having the peripheral edge which is ^ s^ ^ onl one flat ed^e g Mso as shown
received by the recess in the head of the conversion vesse m mG 9 me edge 3, of ^ high-pressure syringe
and which receives (he distal peripheral edge of the manual body 1 has a rclativelv snort radial lengthi Le. me ^ 7< is
syTM^- 40 relatively narrow.
FIG. 6 is an cross-section view taken along Hoe R-B of ^ contrast as shown m mQ w me ^ heral ed 6 of
FIG. 7 of a porhon of a conversion piston holder for a ^ ^ ^ 4 has ^^3,^ opposite radial
conversion kit according to the present invention. projections or wings 9, having a relatively great axial length,
FIG. 7 is a top view of the conversion piston holder shown ^ i e me wings 9 w& relatively wide. The wings 9. of the
in FIG. 6, i.e. showing the side which faces the retractable manual syringe body 4, are generally considerably greater in
and extendable spindle of the injection machine. widm man me of me ring 7 of ^ high-pressure
FIG. 8 is a bottom view of the conversion piston holder syringe body 1, to facilitate easy manual handling of the
shown in FIG. 6, i.e. showing the side which contacts and manual syringe. Preferably, flat portions 6a, 6b, are provided
moves the piston of the manual syringe and which can be 5Q along a section of the peripheral edge 6, situated between the
releasably connected to the piston of a high-pressure wings 9, of the manual syringe body 4.
syringe. "With the above differences in mind, the conversion kit
FIG. 9 is a cross-section view of a high-pressure syringe according to the present invention will now be described
without the piston, along with a distal end view thereof. with reference to FIGS. 1-8. FIG. lis a partial diagrammatic
showing the shape of a peripheral edge radially projecting 55 view, mainly in cross-section, of an injection machine
from the high-pressure syringe body. designed for high-pressure syringes, and including portions
FIG. 10 is a cross-section view of a manual syringe of the conversion kit according to the present invention. For
without the piston, and a distal end view thereof, showing simplicity, FIG. 1 shows only the power-driven retractable
the shape of a distal radial peripheral edge including two and extendable spindle 10, of the injection machine which is
radially opposite wings. 60 used to move the piston of either a high-pressure syringe or
a manual syringe using the conversion kit of the present
DETAILED DESCRIPTION OF THE invention. In FIG. 1, the distal end region a manual syringe,
INVENTION generally designated by reference numeral 12, having a
Initially, the main differences between conventional piston 11, is shown,
manual syringes and high-pressure syringes, especially as 65 The conversion kit according to the present invention
such are important for understanding the present invention comprises a conversion vessel, generally designated by
will be discussed with reference to FIGS. 9 and 10. reference numeral 13. a reducing sleeve, generally desig
