Traitement en cours

Veuillez attendre...

Paramétrages

Paramétrages

Aller à Demande

1. WO1992019164 - DISPOSITIF JETABLE A LANCETTE SERVANT A PERFORER LA PEAU

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

C L A I M S

1. A disposable device for puncturing skin and the blood vessels beneath to obtain blood for subsequent testing, said device comprising a rod (1) with an elongate body (3 ) and a lancet ( 5 ) embedded therein with an axially protruding tip (8); a sleeve (2) with a through-hole ( 13 ) to receive the body (3 ) of the rod via the rear end (11) of the sleeve; first stop means formed by a first radial projection means (9) arranged on the body ( 3 ) of the rod at a predetermined distance from the tip (8) of the lancet, in cooperation with a second radial projection means (15) arranged on the sleeve (2) at a predetermined distance from its front end ( 14 ) , said first stop means temporarily preventing insertion of the rod (1) and retaining the tip (8) of the lancet inside the sleeve (2) in a starting position located a
predetermined distance from the front end ( 14 ) of the sleeve, the arresting function of the first stop means being overcome by the application of external pressure on the rear end ( 6 ) of the rod ( 1 ) ; a second stop means formed by a pressure plate (7) at the rear end (6) of the rod, in cooperation with the rear end (11) of the sleeve, said second stop means determining the operative end position of the tip ( 8 ) of the lancet when it protrudes from the sleeve ( 2 ) ; and at least two longitudinal spring tongues (16, 17) made in one piece with the sleeve (2), distributed uniformly around its periphery, and extending into the sleeve ( 2 ) to abut against the body (3 ) of the rod ( 1 ) thereby centering it and the lancet being
retracted into the sleeve (2) with the aid of the spring force produced in the tongues (16, 17) when the rod (1) is pressed into the sleeve ( 2 ) with the aid of said external force, characterized in that each tongue (16, 17) is defined by axial slits (23) formed in the wall of the sleeve (2), that the tongues (16, 17) extend radially obliquely into the sleeve (2) with their free ends (19) located immediately inside the front end (14) or an orifice ring (20) of the sleeve (2) , the distance between the free ends (19) of the tongues (16, 17) when the rod (1) assumes said starting position, being less than the thickness of the rod (1) at the end provided with the lancet, and that the tongues (16, 17) are arranged to cooperate with the end of the rod (1) provided with the lancet upon movement of the lancet in said directions.

2. A device as claimed in claim 1 , characterized in that each tongue (16, 17) has a concave inner side (21), seen in cross section, so that during its insertion by pressing the rod (1) is guided in all radial directions, seen in a cross section of the rod ( 1 ) and the tongues (16, 17).

3. A device as claimed in claim 1, characterized in that the distance between the tongues (16, 17) at their free end portions is 2-4 mm, preferably 3 mm, less than the thickness of the rod ( 1 ) measured at its front end (4).

4. A device as claimed in any of claims 1-3,
characterized in that each tongue (16, 17) is defined by a U-shaped groove ( 18 ) , the shanks of which being formed by said axial slits (23), the free ends (19) of the tongues (16, 17) being located immediately inside the orifice ring ( 20 ) of the sleeve (2 ) , formed by the
U-shaped groove ( 18 ) .

5. A device as claimed in claim 4, characterized in that the distance between the front ends (19) of the tongues (16, 17) and the orifice ring (20) of the sleeve is 0.5-1.0 mm.

6. A device as claimed in any of claims 1-3,
characterized in that the axial slits ( 23 ) extend to the front end (14) of the rod (1), the free ends (19) of the tongues (16, 17) being located immediately inside the front end (14) of the sleeve.

7. A device as claimed in claim 6, characterized in that the distance between the front ends (19) of the tongues (16, 17) and the front end (14) of the sleeve is 0.5-2.0 mm.

8. A device as claimed in any of claims 1-7,
characterized in that the tongues (16, 17) are arranged to cooperate with a peripheral edge (4) or conical end surface ( 27 ) of the end of the rod ( 1 ) provided with the lancet.

9. *A device as claimed in claim 1, characterized in that the protrusion means (15) is arranged at the rear end (11) of the sleeve.

10. A device as claimed in any of claims 1-9,
characterized in that the body ( 3 ) of the rod ( 1 ) narrows conically towards the end provided with the lancet.