Patent ID: 9693879
Date: 2017-07-04
CPC Classifications: A61B,A61F

Claim:
1. An alignment guide, comprising: a shaft having a longitudinal axis; a housing attached to the shaft and rotatable about a first axis that is substantially perpendicular to the longitudinal axis, wherein the housing is not rotatable relative to the shaft about any other axis; a guide arm that extends from the housing at a predetermined angle along a second axis; and a spirit level connected to the housing on a plane aligned with the predetermined angle, wherein the spirit level is a substantially ovate container partially filled with a liquid, and wherein the container has a bubble disposed therein, a center, and has at least one indicator marking oriented substantially at the center; and wherein the housing includes a base attached to the shaft, and a plate rotatable about the first axis relative to the base, the first portion being attached to the plate and the base has an inner surface, and further comprising a ratchet disposed at least partially within the base, the ratchet configured to act against the inner surface of the base, the ratchet including a first ratchet portion having a first outer surface configured to act against the inner surface of the base, a second ratchet portion having a second outer surface configured to act against the inner surface of the base, and at least one spring disposed between the first ratchet portion and the second ratchet portion and wherein the first ratchet portion has an inner surface and a pin extending from the inner surface configured to be attached to the at least one spring.