摘要 |
Over tightening of the threaded rods (36, 38, 40, 42) used to engage and remove the cement for prosthetic joints is avoided by measuring the depth of the passages into which the rods (36, 38, 40, 42) are threaded and providing sleeves (28, 30, 32, 34) on the rods (36, 38, 40, 42) which serve as visual indicia of the extent of penetration of the rods (36, 38, 40, 42) into the cement. A depth gauge (20) calibrated in both units of length and screw thread turns is provided for the measuring function. The sleeves (28, 30, 32, 34) are slidably received on the rods (36, 38, 40, 42) and proportioned to engage the edges of the passages into which the rods (36, 38, 40, 42) are threaded. In use, the sleeves (28, 30, 32, 34) slide toward a marker as the rods (36, 38, 40, 42) are threaded into place <IMAGE> |
申请人 |
ZIMMER, INC., WARSAW, IND., US |
发明人 |
CHIN, ALBERT K., PALO ALTO, CALIFORNIA 94306, US;MCCOLL, MILTON B., LOS ALTOS HILLS, CALIFORNIA 94022, US;WATKINS, F. THOMAS, MENLO PARK, CALIFORNIA 94025, US |