EP0688532A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Suction-type blood sampler
Assignee: Nipro Corp
•
Filing: 1995-06-01
•
Granted: —
•
Expires: 2015-06-01
Abstract
Abstract A suction-type blood sampler has a housing (1), a lancet unit (2) having a rod (4) extending backward from the lancet unit, and a plunger (3) connected to the rod in the housing and having a seal (7) attached to a forward end of the plunger. The seal is in sliding airtight contact with an inner periphery of the housing. The lancet unit consists of a lancet body (11) having a forwardly extending needle (12) and held by a lancet retainer (18) which is in sliding contact with the inner periphery. The blood sampler further has first, second and third springs (8, 9, 10) placed between the lancet unit and the plunger. The second spring urges the lancet unit to project the needle forwards, and the third spring tends to retract it. The first spring acts to reduce air pressure in the housing when the plunger is released. The blood sampler also has a checking means (32) disposed in the plunger so as to exhaust air and inhibit ambient air from entering the housing, so that the skin is pierced sharply and quickly, and by introducing ambient air into the evacuated housing, just a required amount of blood can be taken accurately and without any fear that the blood will scatter when the open end of the housing is removed from the skin.
Inventors
- 👤 Masao Horie
- 👤 Yoshikazu Kishigami
- 👤 Hiroyuki Nakagami
- 👤 Masayuki Takatera
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 14:51
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/15; A61B5/151; A61B5/15186; A61B5/15188; A61B5/15192; A61B5/15194; A61B5/150007; A61B5/150015; A61B5/150022; A61B5/150053; A61B5/150061; A61B5/150099; A61B5/150206; A61B5/150213; A61B5/150374; A61B5/150381; A61B5/150412; A61B5/15101; A61B5/15103; A61B5/15107; A61B5/15111; A61B5/15115; A61B5/15117
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
261 words
A suction-type blood sampler comprising: a housing, the housing having an open frontal end and an open rearward end; a lancet unit accommodated in a front region of the housing, the lancet unit comprising a lancet body fixed to a lancet retainer, the lancet body having a needle extending forward toward the frontal end of the housing and the lancet retainer being in sliding contact with the inner peripheral surface of the housing; a rod attached to and extending backward from the lancet unit toward the open rearward end of the housing; a plunger provided in a rear region of the housing and having a seal attached to a forward end of the plunger, the seal being in sliding and airtight contact with an inner peripheral surface of the housing; a first spring, a second spring and a third spring all accommodated in the housing between the lancet unit and the plunger, wherein the second spring urges the lancet unit forward to move the needle outwardly of the frontal end of the housing, and the third spring urges the lancet unit to be retracted behind the frontal end, when the plunger is pressed, and wherein the first spring urges said plunger to move toward said open rearward end and to reduce the air pressure in the housing, when the plunger is released; and a checking means disposed in a rear region of an internal cavity of the plunger and capable of exhausting air out of the housing, but inhibiting air from entering the housing through the internal cavity of said plunger.
Claim 2
Dependent Claim
261 words
A suction-type blood sampler comprising: a housing, the housing having an open frontal end and an open rearward end; a lancet unit accommodated in a front region of the housing, the lancet unit comprising a lancet body fixed to a lancet retainer, the lancet body having a needle extending forward toward the frontal end of the housing and the lancet retainer being in sliding contact with the inner peripheral surface of the housing; a rod attached to and extending backward from the lancet unit toward the open rearward end of the housing; a plunger provided in a rear region of the housing and having a seal attached to a forward end of the plunger, the seal being in sliding and airtight contact with an inner peripheral surface of the housing; a first spring, a second spring and a third spring all accommodated in the housing between the lancet unit and the plunger, wherein the second spring urges the lancet unit forward to move the needle outwardly of the frontal end of the housing, and the third spring urges the lancet unit to be retracted behind the frontal end, when the plunger is pressed, and wherein the first spring urges said plunger to move toward said open rearward end and to reduce the air pressure in the housing, when the plunger is released; and a checking means disposed in a rear region of an internal cavity of the plunger and capable of exhausting air out of the housing, but inhibiting air from entering the housing through the internal cavity of said plunger.
Claim 3
Dependent Claim
129 words
A suction-type blood sampler as defined in claim 1, wherein the first spring intervenes between the lancet unit and the internal cavity of the plunger, and said sampler further comprises: an inner cylindrical member which extends forward of the plunger; a flange formed integral with a rear end of the rod; a spring separator; and a hookable member fitting in a rear recess of the lancet unit; wherein the spring separator is formed around the rod and integral with the inner cylindrical member, the second spring intervenes between the lancet unit and the spring separator, the third spring is interposed between said spring separator and said flange, and the hookable member is engageable with a rearward rim extending radially and inwardly from the inner peripheral surface of the housing.
Claim 4
Dependent Claim
76 words
A suction-type blood sampler as defined in claim 2, further comprising a fourth spring and a first partition, the first partition being attached to and closing a rear open end of the inner cylindrical member, and wherein the first spring is interposed between the lancet unit and the first partition, and the fourth spring is disposed partially in the internal cavity of the plunger and between the first partition and the rear region of said cavity.
Claim 5
Dependent Claim
57 words
A suction-type blood sampler as defined in claim 3, further comprising a cap attached to the frontal end of the housing, and at least one lug formed in and integral with an inner periphery of the cap, with the lug being behind a frontal end thereof so as to delimit the forward movement of the lancet unit.
Claim 6
Dependent Claim
24 words
A suction-type blood sampler as defined in any one of claim 1, 2, 3 or 4, wherein the checking means is a check valve.
Claim 7
Dependent Claim
77 words
A suction-type blood sampler as defined in any one of claim 1, 2, 3 or 4, further comprising a second partition for dividing the interior of the plunger into the internal cavity and a rear compartment disposed adjacent to and behind the internal cavity, wherein the second partition has a bore in which a check valve as the checking means is secured, and an air exhausting aperture is formed through a cylindrical wall defining the rear compartment.
Claim 8
Dependent Claim
15 words
A suction-type blood sampler as defined in claim 1, wherein the seal is an O-ring.
References Cited (Backward Citations)
JPS6238140A
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.