Abstract: The present invention provides an improved trocar assembly for use in creating an incision in a patient. The trocar of the present invention includes a unique piercing apex, which eases the insertion process, and an internal tip protector to protect the patient and medical personnel from accidental puncture injuries. The improved tip protector is designed to become fully extended immediately after the leading edge of the trocar enters the patient, thus avoiding many of the operational drawbacks of existing trocar tip protector designs. Additionally, the present invention provides an improved tip protector locking mechanism which is believed to be far simpler and more reliable than existing locking mechanisms.

Abstract: A merchandise display hook for apertured panelboard displays, preferably of all-plastic construction for manufacture by injection molding, is provided with an optionally useable locking key which is installed after mounting of the display hook, to prevent accidental removal thereof. The base of the display hook is formed with a rearwardly opening guide channel arrangement which provides for the reception and guidance of front and back guide legs for the locking key, by means of which the key is installed on and secured to the display hook. Provision is made for removal of the key, when necessary, by insertion of a small tool.