Lancing device
First Claim
1. A method of using a lancing device, the method comprising the acts of:
- providing a lancing device including a parallelogram-shaped gear rack, the gear rack comprising teeth, a pinion rotatably supported in the gear rack, a slider-crank system including a drive arm coupled to the pinion, a lance holder coupled to the drive arm, and a drive spring coupled to the gear rack;
moving the gear rack via the drive spring;
rotating the pinion in response to the movement of the gear rack; and
driving the lance holder in linear motion via the slider-crank system in response to the rotation of the pinion.
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Accused Products
Abstract
A lancing device comprising a movable parallelogram-shaped rack. The rack rotates a linearly fixed pinion which drives a slider-crank system. The slider-crank system in turn drives a lance holder. The parallelogram-shaped rack defines one or more predetermined paths along which the pinion moves. The lance holder is prevented from being extended beyond a predetermined depth when the pinion reaches a predetermined position along the one or more predetermined paths. The pinion is mechanically stopped from further progress by intersecting two legs of the parallelogram-shaped rack. Teeth of the rack may be modified to reduce the change the pinion may jam in the rack.
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Citations
19 Claims
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1. A method of using a lancing device, the method comprising the acts of:
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providing a lancing device including a parallelogram-shaped gear rack, the gear rack comprising teeth, a pinion rotatably supported in the gear rack, a slider-crank system including a drive arm coupled to the pinion, a lance holder coupled to the drive arm, and a drive spring coupled to the gear rack; moving the gear rack via the drive spring; rotating the pinion in response to the movement of the gear rack; and driving the lance holder in linear motion via the slider-crank system in response to the rotation of the pinion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of using a lancing device, the method comprising the acts of:
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providing a frame including a parallelogram-shaped gear rack, the gear rack comprising teeth, a pinion rotatably mounted to interface the gear rack, a lance holder, and a drive spring coupled to the gear rack, the frame being movably supported; moving the gear rack via the drive spring; rotating the pinion in response to the movement of the gear rack; and moving the lance holder between a fired position and a cocked position, wherein movement of the lance holder is in response to rotation of the pinion. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification