Device for the transnasal or oral administration of drugs or the like
First Claim
1. A device for the administration of fluid drugs or similar fluid media to a patient by a human operator, comprising a finger-like applicator (3) having a spray nozzle (6) disposed at the free end thereof and a cylinder unit (1) for accommodating the media to be administered, a piston (7) having an inner end located within the cylinder unit and having an outer actuating end (20) projecting from the cylinder unit, said outer actuating end engagable by the fingers of the human operator for movement of said inner end through the cylinder unit (1) and forcing the media through the spray nozzle (6), the improvement comprising a substantially flat membrane seal (4) located between the cylinder unit and the spray nozzle, said membrane seal having an outer peripheral edge secured to said cylinder unit and spray nozzle having a central flexible portion having a first side exposed to the cylinder unit and a second side exposed to the spray nozzle, said central flexible portion including at least one slot portion forming a normally closed fluid passage, said flexible portion of said membrane seal being deflected adjacent said slot in response to a selected pressure applied to said membrane seal to open said fluid passage, said first and second sides of said central flexible portion of said membrane seal being unsupported and free to deflect toward said cylinder unit or toward said spray nozzle, said selected pressure generated by movement of said piston by the operator forcing said media from the cylinder unit and deflecting said flexible portion to open said slot portion of said membrane seal and transfer the media into the spray nozzle (6), means for coupling and loading said nozzle and said cylinder unit with pressurized source of said media, said selective pressure deflecting said flexible portion toward said cylinder unit to open said slot and transfer media into said cylinder unit from said pressurized source of said media.
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Accused Products
Abstract
A device for the transnasal or oral administration of drugs or similar media, comprising a finger-like applicator (3) which has a spray nozzle (6) disposed at its free end and includes a cylinder unit (1) for accommodating the medium to be administered. The medium is applied by moving a piston (7) into the cylinder unit (1). A membrane-like seal (4) is located between the cylinder unit and spray nozzle and is slotted to open and form a fluid passage under pressure. The cylinder unit may be built into the applicator or may include a separate cartridge releasably mounted in the applicator. The piston may be activated in steps or in a continuous motion. A second applicator may be attached to the side of the first applicator with the spray nozzles located generally in accordance with spacing of human nose nostrils.
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Citations
13 Claims
- 1. A device for the administration of fluid drugs or similar fluid media to a patient by a human operator, comprising a finger-like applicator (3) having a spray nozzle (6) disposed at the free end thereof and a cylinder unit (1) for accommodating the media to be administered, a piston (7) having an inner end located within the cylinder unit and having an outer actuating end (20) projecting from the cylinder unit, said outer actuating end engagable by the fingers of the human operator for movement of said inner end through the cylinder unit (1) and forcing the media through the spray nozzle (6), the improvement comprising a substantially flat membrane seal (4) located between the cylinder unit and the spray nozzle, said membrane seal having an outer peripheral edge secured to said cylinder unit and spray nozzle having a central flexible portion having a first side exposed to the cylinder unit and a second side exposed to the spray nozzle, said central flexible portion including at least one slot portion forming a normally closed fluid passage, said flexible portion of said membrane seal being deflected adjacent said slot in response to a selected pressure applied to said membrane seal to open said fluid passage, said first and second sides of said central flexible portion of said membrane seal being unsupported and free to deflect toward said cylinder unit or toward said spray nozzle, said selected pressure generated by movement of said piston by the operator forcing said media from the cylinder unit and deflecting said flexible portion to open said slot portion of said membrane seal and transfer the media into the spray nozzle (6), means for coupling and loading said nozzle and said cylinder unit with pressurized source of said media, said selective pressure deflecting said flexible portion toward said cylinder unit to open said slot and transfer media into said cylinder unit from said pressurized source of said media.
Specification