Handpiece for spraying on a fluid jet and insertion member for this handpiece

Inventors

Moser, Beat • Widmer, Beat • Butler, Martin • Good, Roman • Rothlin, Cyrill

Assignees

Medaxis AG

Abstract

The present invention relates to a handpiece for spraying on a fluid jet with a handpiece casing in which a nozzle element for forming the jet geometry of the fluid jet is accommodated. The present invention is based on the object of specifying a handpiece for spraying on a fluid jet which can be produced in a more simple and inexpensive manner, and proposes to satisfy the object in that a nozzle element be fixedly connected to an integrally formed nozzle holder which sealingly abuts against the outer circumferential surface of the nozzle element and is fixed relative to the handpiece casing.

Core Innovation

The invention relates to a debridement handpiece for spraying a micro fluid jet, where a compact nozzle element forming a jet geometry is accommodated in a handpiece casing. The nozzle element is fixedly connected to a nozzle holder, such that the nozzle holder sealingly abuts against an outer circumferential surface of the nozzle element and is fixed relative to the handpiece casing. An adapter element is provided with a nozzle holder receptacle adapted to receive the nozzle holder and a tube well for a tube that supplies fluid in communication with the nozzle element.

In the disclosed architecture, a filter element is arranged between the nozzle holder and the tube, while the nozzle holder and the tube are adhesively bonded to the adapter element. The adapter element comprises adhesive introduction openings radially reaching up to the nozzle holder and radially reaching up to the tube, with geometric clearance relationships used so that adhesive introduction does not block flow paths or the filter element. The adapter further includes upstream tapered flow channels for the tube supply and is configured to retain the filter element.

The nozzle holder and nozzle end are additionally protected and positioned by a nozzle cap that reaches over the nozzle holder on the outlet side. The nozzle cap is formed from transparent plastic material and is adhesively bonded to the nozzle holder, with an adhesive introduction opening extending radially to reach up to the nozzle holder. A free space is formed between the nozzle holder and the nozzle cap, and this free space is penetrated by the nozzle element such that an outlet end projects over the nozzle holder and is received within the nozzle cap; an O-ring may be provided as backup sealing.

Claims Coverage

The document provides three independent claims (clm-00001, clm-00010, clm-00011) directed to a handpiece architecture for spraying a fluid jet with a nozzle element fixed relative to a casing, an adapter with nozzle-holder receptacle and tube well, and specific sealing, filtering, adhesive introduction, and nozzle-cap structural relationships. Across the independent claims, the inventive features focus on fixed sealed nozzle-to-holder connection, adhesive-bonded adapter-to-tube and nozzle-holder integration with radially directed adhesive introduction, filter placement, and mechanical/positional positive-fit and nozzle-cap/free-space configurations.

Overall, the independent claims cover a handpiece in which the nozzle element is fixedly connected to a sealingly abutting nozzle holder fixed relative to the casing; fluid is supplied through a tube via an adapter having a nozzle holder receptacle and tube well; a filter element is arranged between the nozzle holder and the tube; adhesive bonding is performed with radially reaching adhesive introduction openings to connect nozzle holder and tube to the adapter; and the outlet-side nozzle cap configuration includes either positive-fit rib/groove interaction or a transparent plastic nozzle cap with a radially extending adhesive introduction opening and a free space penetrated by the nozzle element for receipt of the outlet end.

Stated Advantages

Documented Applications