Stereoscopic video magnification and navigation system

• US 20050090730A1
• Filed: 11/27/2001
• Published: 04/28/2005
• Est. Priority Date: 11/27/2001
• Status: Active Grant

• Current Assignee: Gianpaolo Cortinovis, Maurizio Mascheretti
• Original Assignee: Freni Brembo S.P.A.
• Inventors: Cortinovis, Gianpaolo, Mascheretti, Maurizio
• Granted Patent: US 7,703,582 B2
• Time in Patent Office: Days
• US Class Current: 600/407
• CPC Class Codes: F16D 51/50 mechanically actuated
• CPC Class Codes: F16D 65/40 mechanical
• CPC Class Codes: F16D 65/42 non-automatic

Abstract

An apparatus and method for providing stereoscopic magnified observation enabling an operator to perform surgical procedures without having to remove his eyes from the operating field comprising a head mounted display for provding the operator with stereoscopic magnified images in an operating field, a camera module for providing stereoscopic magnified images, an operator controller unit for enabling an operator to control the operation of the apparatus; and an interface processing unit for processing and dynamically presenting the stereoscopic magnified images in an operating field.

Claims

1. A device for adjusting a dual-servo brake with internal shoes, the device cooperating with adjacent ends of two shoes which are constantly urged towards one another by a resilient element, the shoes being supported for floating freely on a shoe-holder plate so as to perform floating auto-expansion movements against a braking surface of a drum, the device comprising:

adjustment elements, each of which cooperates with one of the adjacent shoe ends and which are movable jointly in opposite directions so as to move the adjacent shoe ends substantially towards one another or apart, the adjustment elements comprising thrust surfaces cooperating with opposed counter-thrust surfaces of a pyramidal end of an actuation element provided with a threaded portion housed rotatably in a threaded through-hole of a support element, the threaded through-hole being arranged substantially along an axis transverse the axis of the mutual separation or approach movement of the ends of the shoes, the support element further comprising support means for housing the adjustment elements slidably so as to form, with the actuation element, a support and thrust structure closed onto the opposed adjustment elements, the actuation element further comprising an operating extension which can be housed so as to float freely in a slot provided in the shoe-holder plate so that an activation end projects from the brake.

2. The device according to claim 1 in which each of the adjustment elements comprises a spacer.

3. The device according to claim 2 in which the spacer comprises a portion suitable for form coupling with a portion of the end of the shoe.

4. The device according to claim 3 in which the portion suitable for form coupling comprises a fork forming a seat for an end portion of a rib of the shoe.

5. The device according to claim 1 in which each of the adjustment elements comprises an end face which is remote from the shoe and a portion of which forms the thrust surface.

6. The device according to claim 5 in which the portion of the end face which forms the thrust surface covers a fraction of the extent of the end face.

7. The All device according to claim 5 in which the portion forming the thrust surface is inclined at a predetermined angle of inclination to a plane transverse the thrust element.

8. The device according to claim 7 in which the angle of inclination is between 10 degrees and 40 degrees.

9. The device according to claim 7 in which the angle of inclination is 20 degrees.

10. The device according to claim 5 in which the portion forming the thrust surface is inclined to a plane transverse the thrust element so as to transfer a force transmitted by the actuation element in a direction suitable for moving the ends of the shoes apart in order to take up the wear of the friction material.

11. The device according to claim 1 in which the adjustment elements are arranged opposite one another so as to form, with the inclined portions, a V-shaped seat for the pyramidal end of the actuation element.

12. The device according to claim 1 in which the actuation element comprises a pyramidal end defined by a plurality of counter-thrust surfaces suitable for abutting the thrust surfaces of the adjustment elements.

13. The device according to claim 12 in which the pyramidal end comprises counter-thrust surfaces which are identical to one another.

14. The device according to claim 12 in which the pyramidal end comprises six counter-thrust surfaces.

15. The device according to claim 12 in which opposed surfaces of the pyramidal end are inclined so as to be arranged parallel to the thrust surfaces facing them.

16. The device according to claim 1 in which the actuation element comprises a body which extends substantially longitudinally with an axis substantially transverse the axis of the mutual approach or separation movement of the ends of the shoes.

17. The device according to claim 16 in which the body comprises an externally threaded cylindrical portion which can cooperate with the threaded through-hole of the support element.

18. The device according to claim 17 in which the threaded portion is provided in the vicinity of the pyramidal end.

19. The device according to claim 17 in which the threaded portion has an extent sufficient to allow the pyramidal end to be inserted between the adjustment elements so as to move the shoes apart by a distance at least equal to the maximum wear of the friction material.

20. The device according to claim 16 in which the actuation element comprises a shank of a length such as to allow an end thereof remote from the pyramidal end to project from the shoe-holder plate.

21. The device according to claim 20 in which the shank comprises an abutment element which can abut a counter-abutment surface provided in the support element, the abutment element defining a position of maximum insertion of the actuation element between the adjustment elements.

22. The device according to claim 16 in which the actuation element comprises an activation end which projects from the brake and can be activated in order to rotate the actuation element, advancing it or retracting it between the adjustment elements.

23. The device according to claim 22 in which the activation end comprises key or nut surfaces suitable for cooperating with a tool such as a wrench or spanner.

24. The device according to claim 1 in which the support element comprises a body provided with a support and guide for the activation element and fork-like arms forming opposed support means for the support and sliding of the adjustment elements.

25. The device according to claim 24 in which the body comprises a plate bent so as to be U-shaped, forming a base comprising a threaded seat for the actuation element and two parallel arms provided with through-holes forming the means for the support and sliding of the adjustment elements.

26. The device according to claim 25 in which the base comprises a cylindrical extension provided with the threaded through-hole for the support and guiding of the actuation element.

29. The device according to claim 6 in which the portion forming the thrust surface is inclined at a predetermined angle of inclination to a plane transverse the thrust element.

30. The device according to claim 6 in which the portion forming the thrust surface is inclined to a plane transverse the thrust element so as to transfer a force transmitted by the actuation element in a direction suitable for moving the ends of the shoes apart in order to take up the wear of the friction material.

31. The device according to claim 13 in which the pyramidal end comprises six counter-thrust surfaces.

27. A dual-servo brake with internal floating shoes comprising an adjustment device, said device cooperating with adjacent ends of two shoes which are constantly urged towards one another by a resilient element, the shoes being supported for floating freely on a shoe-holder plate so as to perform floating auto-expansion movements against a braking surface of a drum, the device comprising:

adjustment elements, each of which cooperates with one of the adjacent shoe ends and which are movable jointly in opposite directions so as to move the adjacent shoe ends substantially towards one another or apart, the adjustment elements comprising thrust surfaces cooperating with opposed counter-thrust surfaces of a pyramidal end of an actuation element provided with a threaded portion housed rotatably in a threaded through-hole of a support element, the threaded through-hole being arranged substantially along an axis transverse the axis of the mutual separation or approach movement of the ends of the shoes, the support element further comprising support means for housing the adjustment elements slidably so as to form, with the actuation element, a support and thrust structure closed onto the opposed adjustment elements, the actuation element further comprising an operating extension which can be housed so as to float freely in a slot provided in the shoe-holder plate so that an activation end projects from the brake.

28. The brake according to claim 27 further comprising an actuator acting on the ends of the shoes remote from those which cooperate with the adjustment device, the actuation ends facing an abutment element for discharging the braking stress directed circumferentially by the shoes, to the shoe-holder plate.