Dispenser
AssigneeNovo Industri A/S
InventorsJorn Rex, Otto A. Vogeley
Life of this patent
Estimating the term…
Abstract
An dispenser characterized by provision for use of a replaceable needle and a prefilled cartridge. The dispenser comprises an elongated body separable into two body sections, with the front end section adapted to contain a prefilled cartridge and with provision at the front end for mounting a needle removably thereon. The back end section contains the operating mechanism shown by FIG. 10 to convert the longitudinal movement of a pushable element into unidirectionally rotary movement, then into longitudinal movement of a piston rod that acts to expel fluid through the needle. A multipurpose cap is protective of the needle end when mounted on the front end, and is an operating member when mounted on the rear end, as is illustrated by FIGS. 1 and 2.
Claims10
A dispenser device for dispensing predetermined successive quantities of fluid through a needle which comprises an elongated body adapted for placement of a double-pointed hollow needle at one end thereof;
- said elongated body further comprising separable top and bottom longitudinal sections secured together, the bottom section having a reservoir region adapted to contain therein a prefilled reservoir to serve as fluid reservoir for dispensing the fluid therefrom;
- a needle placement locale on the bottom section whereby a double-pointed hollow needle situated thereon would extend into the region for the prefilled reservoir and into the fluid of any reservoir in said region;
- the top section containing the dispensing mechanism of:
- a non-rotatable pressure responsive means element adapted to be pushed longitudinally inward from outside of said body, advancing same longitudinally in said body;
- a stationary rotatable screw operatively connected to said pressure responsive means element and rotated by advancing movement of said element;
- a stationary rotatable piston rod nut operatively connected to said rotatable screw and rotated by said rotatable screw and a non-rotatable piston rod threaded to said piston rod nut and advanced by rotation of said piston rod nut;
- spring means adapted to cause said pressure responsive means element to retract when pushing pressure thereon ceases;
- and means adjacent the connection between said screw and said piston rod nut for preventing reverse rotation of said screw during retraction movement of said element;
- said piston rod extending into the region for the prefilled reservoir whereby advancing movement of said piston rod could expel fluid from a reservoir in said region.
Dependencies are inferred from the claim text.