Medical holding arm

Patent metadata

Field	Value
Publication number	US-10072793-B2
Application number	US-201314648865-A
Country	US
Kind code	B2
Filing date	Dec 3, 2013
Priority date	Dec 20, 2012
Publication date	Sep 11, 2018
Grant date	Sep 11, 2018

Abstract

A medical holding arm, comprising at least one joint with two joint bodies which are rotatable relative to each other about a rotational axis (D), wherein a first of the joint bodies has a plurality of locking pins and a second of the joint bodies has a plurality of locking recesses, the number of locking pins differs from the number of locking recesses, the locking pins each have an axially tapered engagement part, the locking recesses are respectively formed axially tapered to selectively receive each of the engagement parts for locking the joint, and when the joint is locked, at least one of the locking pins is received with its tapered engagement part completely in one of the tapered locking recesses, while at least one of the other locking pins is received with its tapered engagement part only partially in one of the other tapered locking recesses.

First claim

What is claimed is:

1. A medical holding arm, comprising at least one joint disposed at the junction of a pair of joint bodies, the pair of joint bodies comprising a first and second joint body, the first and second joint bodies are rotatable relative to each other about a rotational axis, wherein:
the first joint body comprises a plurality of locking pins configured to mechanically engage a plurality of recesses of the second joint body,
at the at least one joint, the number of locking pins of the first joint body differs from the number of locking recesses of the second joint body, and at the at least one joint the locking pins each have an axially tapered engagement part and
the locking recesses are axially tapered to selectively receive at least a portion of the engagement parts for locking the joint, and,
wherein when the at least one joint is locked, at least one of the locking pins of the plurality of locking pins is received with its tapered engagement part completely in one of the tapered locking recesses of the plurality of recesses, while at least one of the other locking pins of the plurality of locking pins is received with its tapered engagement part only partially in one of the other tapered locking recesses of the plurality of locking recesses, wherein
the engagement part of the plurality of locking pins has at least one first flattened contact surface, and the locking recess of the plurality of locking recesses has at least one first flattened contact surface such that when the engagement part of the at least one locking pin is received in the locking recess of the one of the tapered locking recesses, the first contact surfaces of the locking pin and locking recess establish at least partial flat contact with each other.

2. The holding arm according to claim 1 , wherein the first contact surface of the locking pin and the first contact surface of the locking recess are formed as flat surfaces.

3. The holding arm according to claim 2 , wherein that the engagement part of the locking pin is formed as a truncated cone on which the first contact surface is formed.

4. The holding arm according to claim 2 , wherein the locking recess is formed as a truncated pyramid and the second contact surface is formed from a side surface of the locking recess formed in this manner.

5. The holding arm according to claim 2 , wherein the at least one first contact surface of the locking pin comprises at least two contact surfaces, and the at least two contact surfaces are arranged on diametrically opposed sides of the engagement part of the locking pin.

6. The holding arm according to claim 2 , wherein the locking pin, when its respective engagement part is received in the locking recess, only contacts the locking recess with its first contact surface.

7. The holding arm according to claim 1 , wherein the engagement part of the first of the tapered locking pins is formed as a truncated cone on which the first contact surface is formed.

8. The holding arm according to claim 7 , wherein the locking recess is formed as a truncated pyramid and the second contact surface is formed from a side surface of the locking recess formed in this manner.

9. The holding arm according to claim 7 , wherein the at least one first contact surface of the locking pin comprises at least two contact surfaces, and the at least two contact surfaces are arranged on diametrically opposed sides of the engagement part of the locking pin.

10. The holding arm according to claim 7 , wherein the locking pin, contacts the locking recess with its first contact surface of its engagement part when the locking pin is received in the locking recess.

11. The holding arm according to claim 1 , wherein the locking recess of the first of the plurality of tapered locking recesses is formed as a truncated pyramid and the second contact surface is formed from a side surface of the first of the plurality of tapered locking recesses.

12. The holding arm according to claim 11 , wherein the at least one first contact surface of the locking pin comprises at least two contact surfaces, and the at least two contact surfaces are arranged on diametrically opposed sides of the engagement part of the locking pin.

13. The holding arm according to claim 1 , wherein the at least one first contact surface of the first of the tapered locking pins comprises at least two contact surfaces, the at least two contact surfaces are arranged on diametrically opposed sides of the engagement part of the first of the tapered locking pins.

14. The holding arm according to claim 1 , wherein the first of the tapered locking pins, when its engagement part is received in the locking recess of the first of the plurality of tapered locking recesses, only contacts the locking recess of the first of the plurality of tapered locking recesses with its first contact surface.

15. The holding arm according to claim 1 , wherein the plurality of tapered locking pins and the plurality of tapered locking recesses each form a circular arrangement.

16. The holding arm according to claim 15 , wherein the first contact surfaces of the plurality of tapered locking pins and the first contact surfaces of the plurality of tapered locking recesses are aligned along the circular arrangement.

17. The holding arm according to claim 1 , wherein the first joint body has a plurality of through-bores, in which at least one of the locking pins is axially guided.

18. The holding arm according to claim 1 , wherein the plurality of tapered locking pins are resiliently supported at the first joint body and biased against the second joint body.

19. The holding arm according to claim 1 , wherein the number of locking recesses is of a greater magnitude than the number of locking pins.

20. The holding arm according to claim 1 , further comprising at least two rigid holding members, wherein a first holding member of said at least two rigid holding members is coupled to the first joint body and the second holding member of said at least two rigid holding members is coupled to the second joint body.

Assignees

• MAQUET GmbH

Inventors

• Wyslucha Ulrich
• Peter Stefan

Classifications

• A61B90/50

  Supports for surgical instruments, e.g. articulated arms · CPC title

• A61B2090/508

  with releasable brake mechanisms · CPC title

• F16M11/2007

  comprising means allowing pivoting adjustment · CPC title

• F16B2200/50

  Flanged connections · CPC title

• F16C11/10

  Arrangements for locking · CPC title