US 12,472,071 B2Granted

Apparatus for measuring size of cup for hip arthroplasty

AssigneeImedicom Co., Ltd.

InventorDon Soo Ju

Life of this patent

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Abstract

Apparatus for measuring size of a cup for hip arthroplasty according to the present disclosure includes a scale plate marked with a scale to measure size, a first leg portion fixed to one end of the scale plate, and a second leg portion slidably moved relatively to the first leg portion along the scale plate, in which the second leg portion is marked with reading line. First and second jaws for contacting the cup are provided with 180° rotational symmetry on ends of the first and second leg portions, respectively. Central portions of the first and second jaws are bent to protrude in direction in which the first and second leg portions are farther away from each other, so that when contacting inner diameter of the cup, the jaws form one-point contact with the cup, and when contacting outer diameter of the cup, form two-point contact with the cup.

Claims9

Dependent claims

An apparatus for measuring a size of a cup for hip arthroplasty, comprising:

a scale plate marked with a scale to measure the size of the cup for hip arthroplasty;
a first leg portion fixed to one end of the scale plate;
a second leg portion slidably movable relative to the first leg portion along the scale plate, the second leg portion marked with a reading line;
and
a first jaw and a second jaw, each having 180° rotational symmetry, wherein the first jaw is provided on a distal end of the first leg portion opposite a proximal end of the first leg portion fixed to the scale plate and the second jaw is provided on a distal end of the second leg portion opposite a proximal end of the second leg portion, and
central portions of the first jaw and the second jaw are bent to protrude in a direction such that the first leg portion and the second leg portion are farther away from each other, so that when contacting an inner diameter of the cup, the first jaw and the second jaw form a one-point contact with the cup, and when contacting an outer diameter of the cup, the first jaw and the second jaw form a two-point contact with the cup.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/923,516Filed 22 Apr 2021
Priority: KR 10-2020-007318116 Jun 2020
Published: US 2023/0181325 A115 Jun 2023
Granted: 18 Nov 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

A61F 2/32
Joints: for the hip
A61F 2/4609
For insertion or extraction of endoprosthetic joints or of accessories thereof: of acetabular cups
A61F 2/34
For the hip: acetabular cups
A61F 2/4657
Special tools for implanting artificial joints: measuring instruments used for implanting artificial joints