Medspray B.v.

Medspray Humidification B.v.

Henri Joseph Van Egmond

Cornelis Johannes Maria Van Rijn

Wietze Nijdam

Wilhelmus Petrus Johannes De Kruijf

Jacob Baggerman

Eric Jacobus Cornelis Kroon

Stefanus Maria Van Der Vegte

Tom Vincent Huijgen

The present invention provides a spray device that generates a fluidic micro-jet spray and that allows and retains a relatively narrow droplet size distribution, of micro-jets and droplets obtained via the Rayleigh breakup mechanism, under a well-defined control of coalescence. To tint end a spray device is characterized in that a spray nozzle unit is formed by a nozzle body (), comprising a support body () with at least one cavity () spanned by a membrane layer () having a nozzle orifice throughout a thickness of said membrane layer at an area of said cavity () in fluid communication with that cavity (). The nozzle orifice may be part of a first relatively dense group of first orifices () or of a less dense second group of second nozzle orifices () in the membrane layer. A mean diameter of the nozzle orifices () located in the first group substantially differs from the mean diameter of the nozzle orifices () in the second group to obtain a uniform droplet size distribution in the spray.

Spray device for generating a micro-jet spray

An atomizer device for atomizing a liquid under increased pressure, comprising an atomizer bodywith one or more atomizing openings from which a mist formed from the liquid escapes during operation. The device comprises a valve deviceupstream of the atomizer body. The valve devicecomprises a valve cavitywith a valve bodyand a spring chamberin which spring meansare compressible counter to a spring tension. The valve bodyreceives the liquid in valve cavitywith a first operative cross-section D, which first operative cross-section is smaller than a second operative cross-section Dof spring chamberin which spring meansare compressible.

Atomizer device

The invention relates to a spray device having a spray nozzle unit and at least one further spray nozzle unit. Each spray nozzle unit has at least one spray nozzle body, wherein at least one spray nozzle body comprises a chamber for receiving a pressurized fluid. The chamber is bound by a spray wall having at least one spray orifice that extends through the spray wall and opens to an external environment. Each of at least one orifice in a spray wall has a substantially identical predetermined size lying in a predetermined range and releases a mono disperse spray jet of the pressurized fluid fed from the associated reservoir. The range within the first spray nozzle unit differs from the range within at least one further spray nozzle unit; particularly, the ranges do not overlap.

Spray device, spray unit and spray cartridge

A spray device has a spray nozzle unit (), wherein said spray nozzle unit () comprises a cavity () with an inlet () for receiving a pressurized liquid at an operating pressure and an outlet () for releasing a liquid spray during operation. A spray nozzle body () is fitted sealingly within said cavity (), having a perforated nozzle layer () with at least one spray orifice () that extends between an upstream surface and a down stream surface thereof releasing at least one jet of said liquid spray at said downstream surface of said nozzle layer. The spray nozzle unit () is provided with a pressure safety device () upstream of said spray nozzle body (). Said pressure safety device () comprises a closed burst layer () that closes a fluid pathway between said inlet () and said spray nozzle body () but ruptures once a threshold pressure is exceeded. Said operating pressure exceeds said threshold pressure.

Spray device and spray nozzle unit

The present invention relates to a spray of microjets emanating at an inclined angle from nozzles comprised in a substantially planar membrane layer. A spray nozzle unit for spraying a plurality of fluidic microjets from a pressurized liquid comprises a substantially planar (semiconductor) support having an upstream surface and a downstream surface, and a spray membrane layer arranged on the downstream surface of the support. The spray membrane layer comprises a plurality of nozzle orifices each configured for spraying a fluidic microjet in a Rayleigh regime. Thee support defines a cavity extending from the upstream surface to the spray membrane layer. The cavity is in fluid communication with each one of the nozzle orifices for supplying the pressurized liquid to the nozzle orifices. A position of the nozzle orifices, seen along a direction perpendicular to the downstream surface, is offset in respect of a centre of the cavity. At least two of the nozzle orifices exhibit a different offset in respect of the centre of the cavity.

Spray device and spray nozzle body

The present invention relates to a spray device, comprising a spray nozzle body () and a substantially planar membrane layer () suspended over a nozzle cavity () to generate microjets, especially for pharmaceutical applications, in particular preservative free formulations. The nozzle body () contains a microbial barrier, particularly a microvalve () between a fluid supply channel () and said cavity ().

Growing community of inventors

Enschede, Netherlands

Henri Joseph Van Egmond