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US 5,957,886 AGranted
Spring-Powered dispensing device
AssigneeWeston Medical Limited
InventorTerence Edward Weston
Life of this patent
Estimating the term…
Abstract
A needleless injector is described for dispensing a liquid material, comprising a dispensing member which moves under the force of a spring providing an energy store. A damping arrangement, employing a viscous damping medium such as grease, is used to damp recoil during dispensing.
Claims9
A needleless injector comprising:
- a first, user-holdable member,
- a second member which is movable with respect to the first member, the second member having a liquid outlet for a liquid to be injected into a subject, and a dispensing member movable to expel the liquid through the outlet under the force of a spring which provides an energy store, , and
- damping means, comprising a viscous damping medium, operable to damp movement of said first member with respect to said second member.
Dependencies are inferred from the claim text.