Lancing device
First Claim
Patent Images
1. A lancing device for use with a lance, the device comprising:
- a parallelogram-shaped gear rack;
a pinion rotatably supported in the gear rack, the pinion being rotated in response to the movement of the gear rack;
a slider-crank system comprising a drive arm coupled to the pinion; and
a lance holder coupled to the drive arm, wherein rotation of the pinion drives the lance holder in linear motion.
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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 chance the pinion may jam in the rack.
170 Citations
23 Claims
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1. A lancing device for use with a lance, the device comprising:
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a parallelogram-shaped gear rack; a pinion rotatably supported in the gear rack, the pinion being rotated in response to the movement of the gear rack; a slider-crank system comprising a drive arm coupled to the pinion; and a lance holder coupled to the drive arm, wherein rotation of the pinion drives the lance holder in linear motion. - View Dependent Claims (2, 3, 4, 5)
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6. A lancing device for use with a lance, the device comprising:
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a parallelogram-shaped rack; a pinion rotatably supported in the rack, the pinion being rotated in response to the movement of the gear rack; a slider-crank system comprising a drive arm coupled to the pinion; and a lance holder coupled to the drive arm, wherein rotation of the pinion drives the lance holder in linear motion, wherein the parallelogram-shaped rack comprises a proximal acute angle, and a distal acute angle positioned closer to the lance holder than the proximal acute angles, and wherein the pinion rotates 180°
when moving between the distal acute angle and the proximal acute angle. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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13. A lancing device for use with a lance, the device comprising:
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a parallelogram-shaped rack, the rack comprising four segments; a pinion rotatably supported in the rack, the pinion being rotated in response to the movement of the rack, the pinion moving between a first acute angle position and a second acute angle position, the pinion comprising teeth; a slider-crank system comprising a drive arm coupled to the pinion; and a lance holder coupled to the drive arm, wherein rotation of the pinion drives the lance holder in linear motion, wherein the rack segments comprise teeth adapted to engage the pinion teeth and at least two teeth on each segment are modified to reduce chances of the pinion jamming at either one of the first and second acute angle positions.
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14. A lancing device for use with a lance, the device comprising:
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a frame comprising a parallelogram-shape gear rack, the frame being movably supported; a pinion rotatably mounted to interface the gear rack, the pinion being rotated in response to the movement of the gear rack; and a lance holder movable 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)
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17. A lancing device for use with a lance, the device comprising:
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a frame comprising a parallelogram-shape rack, the frame being movably supported; a pinion ratably mounted to interface the rack, the pinion being rotated in response to the movement of the gear rack; and a lance holder movable between a fired position and a cocked position, wherein movement of the lance holder is in response to the rotation of the pinion. wherein the parallelogram-shaped rack comprises a first acute angle and a second acute angle and the pinion is positioned proximate to the first acute angle when the lance holder is in the cooked position and the pinion is positioned proximate to the second acute angle when the lance holder is in the fired position. - View Dependent Claims (18)
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19. A lancing device for use with a lance, the device comprising:
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a frames; parallelogram shaped gear rack and pinion means for moving the frame along a predetermined path from a cocked position to a fired position, the gear rack and pinion means comprising one or more rack segments fixed relative to the frame, and a pinion interfacing the one or more rack segments; lance holder means for holding and moving the lance in linear motion from a retracted position to a predetermined extended position; means for coupling movement of the frame to the lance holder means such that the lance holder moves the lance from the retracted position to the extended position as the frame moves from the cocked position to the fired position along the predetermined path; and means for preventing the lance from extending beyond the predetermined extended position. - View Dependent Claims (20, 21, 22, 23)
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Specification