Adjustable food shield with detents

1. An adjustable food shield, comprising:

a pair of support columns, one at each end of the adjustable food shield, each support column having a top end and a bottom end and including features for affixing the support column to a surface at the bottom end of the support column, and each support column defining an integral pocket formed in a side of the support column and positioned between the top and bottom ends for coupling to a rotation and detent mechanism;

a pair of rotation and detent mechanisms, one of the rotation and detent mechanisms being at least partially housed within the integral pocket of each support column;

a top shelf resting on and attached to the top ends of the support columns, the top shelf having a front edge and a back edge;

a pair of rotation arms, one of the rotation arms coupled respectively to each of the rotation and detent mechanisms, such that the rotation arms are rotatable about an axis essentially parallel with a lengthwise dimension of the adjustable food shield, the rotation and detent mechanisms providing detents at a number of angular positions of the rotation arms; and

a shield panel fixed to the rotation arms.

2. The adjustable food shield of claim 1 , wherein the top shelf includes a main portion made of glass and a downwardly-angled lip made of glass, the main portion and the downwardly-angled lip being bonded together at their common edge.

3. The adjustable food shield of claim 1 , wherein the rotation and detent mechanisms limit the angular travel of the rotation arms and shield panel, and wherein the shield panel can reach at least a horizontal orientation under the top shelf, and a vertical orientation below the front edge of the top shelf.

4. The adjustable food shield of claim 3 , wherein the detent mechanisms provide detents for the horizontal orientation of the shield panel, the vertical orientation of the shield panel, and at least one intermediate orientation of the shield panel between the horizontal and vertical orientations.

5. The adjustable food shield of claim 4 , further comprising at least one retractable locking pin configured to lock the rotation and detent mechanisms at each of the detent positions.

6. The adjustable food shield of claim 3 , wherein each rotation and detent mechanism comprises:

a detent body of a shape and size to mount at least partially within the pocket formed in the respective support column, the detent body defining a cavity and the detent body including a travel limiter protruding into the cavity, the travel limiter having two fixed travel limiting faces;

a detent plate of a shape and size to nest and rotate within the cavity of the detent body, the detent plate having two limiting surfaces between which the travel limiter of the detent body is disposed, such that one of the two limiting surfaces engages a respective one of the fixed travel limiting faces of the detent body at each extreme of angular rotation of the arms, and the detent plate includes features for engaging a respective one of the arms such that the arm rotates with the detent plate; and

one or more spring loaded ball plungers mounted in the detent body, each ball plunger positioned to engage a recess in the detent plate at each of the detent positions in the rotation of the arms.