DISPOSABLE LANCET

• US 3,789,830 A
• Filed: 09/22/1971
• Issued: 02/05/1974
• Est. Priority Date: 09/23/1970
• Status: Expired due to Term

• Current Assignee: Sven-Erik Malmstrom
• Original Assignee: Sven-Erik Malmstrom
• Inventors: Malmstrom, Sven-Erik
• Primary Examiner(s): Pace, Channing L.
• Application Number:
  US05/182,862
• Time in Patent Office: 867 Days
• Field of Search: 128/2F,314
• US Class Current: 606/181
• CPC Class Codes: A61B 17/32093 for skin incisions
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/150175 Adjustment of penetration depth
• CPC Class Codes: A61B 5/150259 Improved gripping, e.g. with high friction pattern or projections on the housing surface or an ergonometric shape
• CPC Class Codes: A61B 5/150282 for piercing elements, e.g. blade, lancet, canula, needle
• CPC Class Codes: A61B 5/150427 Specific tip design, e.g. for improved penetration characteristics
• CPC Class Codes: A61B 5/15105 Purely manual piercing, i.e. the user pierces the skin without the assistance of any driving means or driving devices
• CPC Class Codes: A61B 5/15146 Devices loaded with multiple lancets simultaneously, e.g. for serial firing without reloading, for example by use of stocking means. multiple simultaneous cutting or piercing A61B5/150977
• CPC Class Codes: B21D 28/06 Making more than one part out of the same blank; Scrapless working
• CPC Class Codes: Y10T 29/49794 Dividing on common outline

Abstract

A disposable lancet used for piercing the tissue of a finger to obtain blood specimens. The lancet is designed to contain minimum material to achieve low material costs which still have the strength and rigidity to be completely functional. The lancet design permits multiple lancets to be punched from a strip of sheet steel to obtain economy in the manufacturing operation.

Claims

1. A blood-letting lancet constructed from sheet metal comprising, a grip portion of a generally elongated shape, a piercing portion disposed at one end of the lancet provided with a sharp point, a lateral recess formed in the grip portion adjacent the end thereof opposite said pointed end a penetration limiting portion disposed between the grip portion and the piercing portion and integral therewith for restricting the penetration depth of the piercing portion, said penetration limiting portion having a substantially greater width than the adjacent grip portion, said penetration limiting portion being defined by at least one lateral projection having the same configuration as the lateral recess formed in the grip portion.

2. The combination according to claim 1 wherein said grip portion includes recesses on opposite sides of the grip portion axis which are complementary to the configuration of said penetration limiting portion.

3. The combination according to claim 1 wherein said penetration limiting portion comprises a pair of sections projecting respectively, transversely from the longitudinal axis of said grip portion and are symmetrically disposed relative to said axis, and saId sections each having an edge on the piercing portion side of said penetration limiting portion which lies perpendicular to said axis for limiting the depth of penetration of said piercing portion.

4. The combination according to claim 1 wherein said penetration limiting portion is asymmetrically positioned on one side of said strip.