×

Device for administering an injectable product

  • US 6,258,068 B1
  • Filed: 05/14/1999
  • Issued: 07/10/2001
  • Est. Priority Date: 05/15/1998
  • Status: Expired due to Term
First Claim
Patent Images

1. A device for administering an injectable product, comprising:

  • a) a base section;

    b) a container arranged in the base section from which a product dose is dispensed through a needle by displacement of a piston associated with the container;

    c) a drive unit, comprising a driven member and a drive element, the drive element applying a drive force on said driven member upon actuating the drive unit, by which drive force on said drive member said driven member is displaced in the direction of the piston, thus advancing said piston within said container; and

    d) a chamber open to the atmosphere for creating a damping force, wherein a portion of the driven member forms at least one wall of the chamber, said chamber comprising a port open to the atmosphere for allowing air to flow in and out of said chamber, whereby, when advancing said driven member the chamber changes in volume, said port allowing for a delayed pressure compensation accompanying the change in volume thereby creating the damping force, said damping force interacting with the drive force and counter forces associated with the use of the device.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×