Suction-type blood sampler
First Claim
1. A suction-type blood sampler comprising:
- a housing;
a lancet unit positioned in a front region of the housing;
a rod connected to and extending in a direction away from the lancet unit;
a plunger provided in a rear region of the housing and having a gasket attached to a forward end of the plunger;
said rod connected to said plunger;
said housing having an open frontal end and an open rearward end;
said lancet unit including a lancet body fixed to a lancet retainer, said lancet body having a needle extending forwardly therefrom;
said lancet retainer being in sliding contact with an inner peripheral surface of said housing;
a first spring and a second spring provided in the housing between the lancet unit and the plunger and a third spring within said plunger, wherein said first spring urges said lancet unit forward to move said needle outwardly of said housing, and said second spring urges said lancet unit to be retracted behind said frontal end, and wherein said third spring controls reduction of air pressure in said housing, in response to movement of said plunger.
1 Assignment
0 Petitions
Accused Products
Abstract
A blood sampler of the suction-type is provided with a gasket, a lancet unit and a plunger slidable in a housing having an open front and an open rear end. A rod is connected at its front end to the lancet unit. The rod extends rearwardly over a detent integral with the inner periphery of the housing, through a central opening of the gasket and into an axial bore of the plunger. A flange, secured to the rear end of the rod is slidable within the axial bore, the gasket is slidable within the housing and behind the detent, and a protrusion formed integral with an intermediate portion of the rod is engageable with the detent. The blood sampler further has a first spring intervening between the detent and the lancet unit, and a second spring accommodated in the bore and intervening between the flange and the front end of the plunger.
375 Citations
15 Claims
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1. A suction-type blood sampler comprising:
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a housing; a lancet unit positioned in a front region of the housing; a rod connected to and extending in a direction away from the lancet unit; a plunger provided in a rear region of the housing and having a gasket attached to a forward end of the plunger; said rod connected to said plunger; said housing having an open frontal end and an open rearward end; said lancet unit including a lancet body fixed to a lancet retainer, said lancet body having a needle extending forwardly therefrom; said lancet retainer being in sliding contact with an inner peripheral surface of said housing; a first spring and a second spring provided in the housing between the lancet unit and the plunger and a third spring within said plunger, wherein said first spring urges said lancet unit forward to move said needle outwardly of said housing, and said second spring urges said lancet unit to be retracted behind said frontal end, and wherein said third spring controls reduction of air pressure in said housing, in response to movement of said plunger. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification