Skin graft preparation apparatus
First Claim
Patent Images
1. A skin graft preparation apparatus, comprising:
- (a) a housing;
(b) support means on said housing for supporting roller means;
(c) roller means supported on said support means and comprising a guide roller and a cutting roller;
(d) openable cover means on said support means for allowing, in an open position thereof, removal and replacement of said cutting roller;
(e) actuator means for said roller means including an actuator coupled to one of said rollers and drive means drivingly coupling said rollers together whereby rotations of one of said rollers result in rotations of another of said rollers;
(f) said guide roller including laterally adjacent cylindrical regions of differing diameters; and
(g) carrier means having a first face and a second face, said first face having a stepped surface and said second face being substantially flat whereby said carrier means has adjacent regions of differing thicknesses;
(h) said carrier means being insertable between said rollers with said first face facing said guide roller with at least one of said adjacent regions of said carrier means having a greater thickness at least partially engaging an aligned one of said adjacent regions of said guide roller having a lesser diameter and with a piece of skin on said second face whereby movement of said actuator means in a prescribed direction results in movement of said carrier means in a direction of motion between said rollers and engagement of said cutting roller with said piece of skin to cut a desired pattern of cuts thereon;
(i) said adjacent regions of said carrier means being elongated in said direction of motion.
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Abstract
A skin graft preparation apparatus is disclosed which includes the use of an extruded skin carrier having guide surfaces thereon which mesh with corresponding guide surfaces on one of the rollers of the apparatus. The device includes structure allowing easy removal, replacement and exchange of the cutter mechanism thereof so that cutters of different ratios may easily be interchanged. Springs engaging respective ends of the cutter mechanism allow slight upward movements thereof to accommodate to skin of varying thickness.
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Citations
17 Claims
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1. A skin graft preparation apparatus, comprising:
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(a) a housing; (b) support means on said housing for supporting roller means; (c) roller means supported on said support means and comprising a guide roller and a cutting roller; (d) openable cover means on said support means for allowing, in an open position thereof, removal and replacement of said cutting roller; (e) actuator means for said roller means including an actuator coupled to one of said rollers and drive means drivingly coupling said rollers together whereby rotations of one of said rollers result in rotations of another of said rollers; (f) said guide roller including laterally adjacent cylindrical regions of differing diameters; and (g) carrier means having a first face and a second face, said first face having a stepped surface and said second face being substantially flat whereby said carrier means has adjacent regions of differing thicknesses; (h) said carrier means being insertable between said rollers with said first face facing said guide roller with at least one of said adjacent regions of said carrier means having a greater thickness at least partially engaging an aligned one of said adjacent regions of said guide roller having a lesser diameter and with a piece of skin on said second face whereby movement of said actuator means in a prescribed direction results in movement of said carrier means in a direction of motion between said rollers and engagement of said cutting roller with said piece of skin to cut a desired pattern of cuts thereon; (i) said adjacent regions of said carrier means being elongated in said direction of motion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A skin graft preparation apparatus, comprising:
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(a) a housing; (b) support means on said housing for supporting roller means; (c) roller means supported on said support means and comprising a guide roller and a cutting roller; (d) openable cover means on said support means for allowing, in an open position thereof, removal and replacement of said cutting roller; (e) actuator means for said roller means including an actuator coupled to one of said rollers and drive means drivingly coupling said rollers together whereby rotations of one of said rollers result in rotation of another of said rollers; (f) said guide roller including adjacent regions of differing diameters; and (g) carrier means having a first face and a second face, said first face having a stepped surface and said second face being substantially flat whereby said carrier means has adjacent regions of differing thicknesses; (h) said carrier means being insertable between said rollers with said first face facing said guide roller and with a piece of skin on said second face whereby movement of said actuator means in a prescribed direction results in movement of said carrier means between said rollers and engagement of said cutting roller with said piece of skin to cut a desired pattern of cuts thereon; (i) a region of said guide roller of relatively greater diameter having a knurled surface, whereby when said carrier means is inserted between said rollers, a realtively thinner area thereof engages said knurled surface.
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17. A skin graft preparation apparatus, comprising:
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(a) a housing; (b) support means on said housing for supporting roller means; (c) roller means supported on said support means and comprising a guide roller and a cutting roller; (d) openable cover means on said support means for allowing, in an open position thereof, removal and replacement of said cutting roller; (e) actuator means for said roller means including an actuator coupled to one of said rollers and drive means drivingly coupling said rollers together whereby rotations of one of said rollers result in rotations of another of said rollers; (f) said guide roller including adjacent regions of differing diameters; and (g) carrier means having a first face and a second face, said first face having a stepped surface and said second face being substantially flat whereby said carrier means has adjacent areas of differing thicknesses; (h) said carrier means being insertable between said rollers with said first face facing said guide roller and with a piece of skin on said second face whereby movement of said actuator means in a prescribed direction results in movement of said carrier means between said rollers and engagement of said cutting roller with said piece of skin to cut a desired pattern of cuts thereon; (i) further wherein a platform is provided on said housing to support said carrier means in alignment with a space between said rollers, said platform including a surface defining adjacent regions of different elevations corresponding to said adjacent regions on said guide roller and said adjacent areas on said carrier means first face, whereby said carrier means is guideable on said platform surface into said space.
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Specification