Material thickness control over retro-reflective marker

• US 8,668,342 B2
• Filed: 02/29/2012
• Issued: 03/11/2014
• Est. Priority Date: 11/30/2011
• Status: Active Grant

• Current Assignee: IZI Medical Products
• Original Assignee: IZI Medical Products
• Inventors: Shafer, Helen Zinreich, Zinreich, David Alan, Crumb, Douglas
• Primary Examiner(s): CHERRY, EUNCHA P
• Application Number:
  US13/408,272
• Publication Number:
  US 20130135733A1
• Time in Patent Office: 741 Days
• Field of Search: 359/515, 359/536, 359543-545
• US Class Current: 359/544
• CPC Class Codes: B65D 2575/3281 Tear lines dividing the package into a plurality of packages
• CPC Class Codes: B65D 2575/329 Fixing or supporting means for the contents
• CPC Class Codes: B65D 75/327 and forming several compartments
• CPC Class Codes: B65D 75/36 one sheet or blank being recessed and the other formed of relatively stiff flat sheet material, e.g. blister packages , the recess or recesses being preformed B65D73/0057, B65D73/0092 take precedence
• CPC Class Codes: B65D 85/58 for ball bearings, washers, buttons or like spherical or disc-shaped articles cards for buttons, collar-studs or sleeve-links A44B7/00
• CPC Class Codes: G01T 1/105 Read-out devices G01T1/115 takes precedence
• CPC Class Codes: G01T 1/2014 Reading out of stimulable sheets, e.g. latent image
• CPC Class Codes: G02B 5/134 including a threaded mounting member

Abstract

Described is a device comprising a retro-reflective marker sphere comprising: a core ball comprising: a generally spherical body portion, a mounting base extending from one end of the body portion of the core ball, and a mounting recess having a recess opening in the mounting base and extending into the body portion of the core ball, and a retro-reflective covering on the core ball, the retro-reflective covering comprising an opening through which the mounting base of the core ball extends, wherein a flat lower surface of the mounting base is spaced proximally from a lower edge of the opening of the retro-reflective covering, and wherein the mounting recess includes an interior screw thread for engaging an exterior screw thread of a mounting post when the retro-reflective marker sphere is mounted on the mounting post.

Claims

1. A device comprising a retro-reflective marker sphere comprising:

a core ball comprising;

a generally spherical body portion, and

a mounting recess extending into the body portion of the core ball, and

a retro-reflective covering on the core ball,

wherein the retro-reflective covering has an opening aligned with the mounting recess of the core ball,

wherein the mounting recess includes one or more interior engagement structures for engaging one or more exterior engagement structures of a mounting post when the retro-reflective marker sphere is mounted on a mounting post, and

wherein the thickness of the retro-reflective covering varies by no more than 0.00762 cm.

2. The device of claim 1, wherein the mounting recess includes an interior screw thread for engaging an exterior screw thread of the mounting post when the retro-reflective marker sphere is mounted on the mounting post.

3. The device of claim 1, wherein the mounting recess includes one or more interior snap-on engagement structures for engaging one or more exterior snap-on engagement structures of the mounting post when the retro-reflective marker sphere is mounted on the mounting post.

4. The device of claim 1, wherein the retro-reflective covering comprises only two pieces and wherein the opening in the retro-reflective covering is in only one of the two pieces.

5. The device of claim 2, wherein the interior screw thread is a semi-locking interior screw thread.

6. The device of claim 5, wherein the semi-locking interior screw thread includes a rounded ridge that does not fully mate with a groove of the exterior screw thread during engagement.