Patent ID: 9707014
Date: 2017-07-18
CPC Classifications: A61B

Claim:
1. A method of limiting a range of angular positions of a screw with respect to a moveable head comprising the steps of: providing one or more screws, wherein at least one of said screws includes a shaft and a screw head attached to said shaft; providing one or more moveable heads, wherein at least one of said moveable heads includes a top portion and a bottom portion, wherein said top portion of said at least one movable head includes a proximal end defining a U-trough and said bottom portion includes a distal end opposite said proximal end, wherein said U-trough has a U-trough axis, and wherein said bottom portion includes a bottom opening therethrough, said bottom opening being disposed at said distal end, wherein said at least one moveable head is capable of receiving said screw head of said at least one screw; and positioning said at least one screw relative to said at least one moveable head, wherein said at least one screw projects from said bottom opening of said at least one moveable head, said bottom opening having a contact perimeter shape defining a range of angular positions of said screw with respect to said moveable head, wherein said contact perimeter shape comprises a curved portion and a single straight portion that connects with said curved portion, wherein said single straight portion is at said distal end.