Suction tube with a sieve

• US 20040014002A1
• Filed: 03/12/2003
• Published: 01/22/2004
• Est. Priority Date: 09/13/2000
• Status: Active Grant

• Current Assignee: Bladhs Medical AB
• Original Assignee: Bladhs Medical AB
• Inventors: Lundgren, Dan
• Granted Patent: US 6,881,060 B2
• Time in Patent Office: Days
• US Class Current: 433/91
• CPC Class Codes: A61C 17/08 Aspiration nozzles
• CPC Class Codes: A61M 1/84 Drainage tubes; Aspiration tips for negative pressure wound therapy A61M1/90; for surgical cutting instruments A61B17/32

Abstract

A device in a suction tube to be connected to a suction conduit for surgical or dental use to separate from the suction flow entrained particulate material. The suction tube being open at both ends and has a sieve element located therein. The sieve is inclined in relation to the axial direction of the suction tube in order that separated material shall be collected in a pocket formed at the suction end of the suction tube.

Claims

1. A device in a suction tube to be connected to a suction conduit for surgical or dental use to be connected with a suction conduit, for separating from the suction flow particulate material entrained therein the suction tube (1) being opened at both ends and has a sieve element located therein, characterized in that the sieve element (3) is inclined in relation to the axial direction of the suction tube.

2. Device as in claim 1 characterized in that the sieve element (3) is located in a separate sieve insert (2) which is detachably connected with the inlet end of the suction tube (1).

3. Device as in claim 2, characterized in that the sieve insert (2) has light slide fit in the suction tube (1).

4. Device as in claim 3, characterized in that the suction tube (1) has an aperture (9) which as seen in the flow direction is located behind the sieve element (3) of the sieve insert (2).

5. Device as in claim 4, characterized in that the sieve insert behind the sieve element (3) as seen in the flow direction is provided with one or more lateral apertures (8) the sieve insert being rotatable about the longitudinal axis of the suction tube to bring the apertures to overlap to a major or minor degree, in dependence of the rotational position, and thus to establish a major or minor stray flux.

6. Device as in claim 4 characterized in that the aperture in the suction tube (1) comprises a slot (11) extending in the longitudinal direction of the suction tube (1), and that a button (12) penetrating the slot and being fixed to the sieve insert, together with the sieve insert being displaceable outwards and inwards in the suction tube (1) to provide a major or minor stray flux through the slot.

7. Device as in claim 6, characterized in that the sieve element (3) is transversely suspended in an inclined position by a spring blade and by means of the spring blade is biased towards a sieving position in the forward end of the sieve insert, the sieve element being rotatable under the influence of an operating member (14) to an inactive position in which maximum and unlimited flow is allowed.

8. Device as in any of the preceding claims, characterized in that the inner end of the sieve element (3) as seen in the suction flow direction has an unperforated portion for collecting separated particulate material in a pocket (3) formed between said portion and the inside surface of the suction tube.

9. Device as in any of the preceding claims characterized in that the inlet muzzle is inclined in relation to the axial direction of the suction tube.

10. Device as in any of the preceding claims characterized in that the sieve element (3) and the inlet muzzle are inclined substantially in the same direction.

11. Device as in any of the preceding claims characterized in that apertures of the sieve element (3) are arranged on protrusions from the surface of the sieve element the apertures being perpendicular to the axial direction of the suction tube.

12. Device as in claim 8 characterized in that the apertures of the sieve have diminishing dimension in the direction towards the unperforated portion.

13. Device as in any of the preceding claims characterized in that the muzzle of the suction tube (11) or the separate sieve insert (2) is intended to be held, at use thereof, substantially horizontally, the sieve element being arranged such that separated material will be collected in a pocket (5) formed at the muzzle side at the lower portion of the sieve element (3).