A spring-loaded surgical awl is provided for orthopedic applications that include creating or enlarging holes in bone. The awl has an awl shaft with a cutting tip within a sleeve, with a spring disposed between the awl shaft and sleeve to return the cutting tip of the awl tip to a position within the...http://www.google.fr/patents/US7338494?utm_source=gb-gplus-shareBrevet US7338494 - Spring-loaded awl
