Appeal No. 2000-0652 Page 12
Application No. 08/868,774
elements have a generally cylindrical configuration, and are
arranged coaxially to define a generally cylindrical housing
20 which can easily be handled by a patient or medical
attendant. As shown in Figures 1, 5b and 7-9, a plunger 22 is
at least partially positioned within the portion of the
injection device housing 20 defined by the adjusting knob 12,
upper body 14 and center body 16. The plunger includes a
hollow, substantially cylindrical body 22a including a band of
radially projecting ribs 22b extending
outwardly therefrom. A pair of opposing projections 22c extend
radially inwardly from the front end of the cylindrical body.
The rear end of the plunger includes a pair of projections 22d
which extend radially outwardly from the cylindrical body 22a.
The rear end of the plunger 22 is secured to a push button 24.
The push button fits partially within the adjusting knob 12
when the plunger is fully inserted within the injection device
housing 20.
Balkwill's transparent housing 18 receives a cartridge 46
of the type including an internal piston 46b and a pierceable
seal 46a at one end thereof. Both ends of the transparent
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Last modified: November 3, 2007