# US 8,739,971 B2 · Stopper storage case > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,739,971 B2 - Document ID: US8739971B2 - Status: Granted - Kind: B2 - Application number: 13/246,373 - Filed: 2011-09-27 - Published: 2012-03-29 - Granted: 2014-06-03 - Earliest claimed: 2010-09-27 - Assignees: GC Corporation - Applicants: Naoto Fujii; Hirotaka Yoshihara - Inventors: Naoto Fujii; Hirotaka Yoshihara - Web page: https://patentgrep.com/patent/US8739971B2 ## CPC - A61C 19/02: Protective casings, e.g. boxes for instruments; Bags {(A61C5/44 takes precedence)} - B25H 3/003: {Holders for drill bits or the like} - A61C 5/44: Means for controlling working depth, e.g. supports or boxes with depth-gauging means, stop positioners or files with adjustably-mounted handles - A61C 8/0089: {Implanting tools or instruments} - A61C: DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE (non-driven toothbrushes A46B; {tongue scrapers A61B17/24;} preparations for dentistry A61K6/00; preparations for cleaning the teeth or mouth A61K8/00, A61Q11/00) - B25H: WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS (storing or packaging B65) ## Abstract A stopper storage case has openings and drill blade insertion paths. The openings are large enough to allow a spring-like engagement portion of the stopper to pass. Each drill blade insertion path is large enough to allow a drill blade to pass. Concave parts extend from the respective openings to the drill blade insertion paths and can store stoppers of different lengths. Each of the concave parts has a protrusion to be engaged in a groove in the outer peripheral surface of the stopper. Stopper holding overhangs formed at the top of each concave part are elastic enough not to interfere with insertion of the stopper from above into the concave part and removal of the stopper from inside the concave part. ## Claims ### Claim 1 A stopper storage case, comprising: a case body having a first end, sides, and a second end, which is opposite from the first end of the case body; a plurality of parallel openings formed in the first end of the case body; a plurality of parallel drill blade insertion paths formed in the second end of the case body; concave parts of different lengths formed between respective openings and drill blade insertion paths of the case body such that each concave part together with a respective opening and drill blade insertion path forms a through-hole from the first end of the case body to the second end of the case body, wherein each concave part comprises a protrusion on an inner surface thereof and a stopper holding overhang at the top of each concave part; and (Y) a plurality of stoppers each formed as a cylinder having a first end and a second end opposite to the first end, and each comprising (Ya) a stopper through-hole formed between the first end and the second end of the stopper, (Yb) a spring engagement portion at the first end of the stopper, and (Yc) a groove formed in the outer peripheral surface of the stopper, wherein the protrusion of the inner surface of the concave part is engaged with the groove (Yc) formed in the outer peripheral surface of the stopper, wherein the stopper storage case is configured such that when a drill (X) comprising a blade (Xa) at a free end, a shank (Xb) at the other end, and a projecting flange (Xc) disposed between the blade (Xa) and the shank (Xb) is inserted into the opening of the case body, the blade (Xa) of the drill passes through the stopper through-hole (Ya) and the drill blade insertion path at the second end of the case body, and the projecting flange (Xc) of the drill engages the spring engagement portion (Yb) of the stopper thereby defining a penetration depth of the blade (Xa). ### Claim 2 (depends on 1) The stopper storage case of claim 1, wherein the ends of the openings of the concave parts are positioned in a line. ### Claim 3 (depends on 1) The stopper storage case of claim 1, wherein the concave part has a rectangular cross section and the protrusions are formed on both side faces of the concave part. ### Claim 4 (depends on 1) The stopper storage case of claim 1, wherein the concave part has a semicircular cross section and the protrusions are formed on the bottom of the concave part. ### Claim 5 (depends on 1) The stopper storage case of claim 1, wherein the stopper holding overhang is formed from the material from which the case body is formed. ### Claim 6 (depends on 1) The stopper storage case of claim 1, wherein the stopper holding overhang is formed from an elastic material bonded and fixed on the top of a material of the case body, and wherein the case body is formed from a rigid material. ### Claim 7 (depends on 1) The stopper storage case of claim 1, further comprising: an extension, which is provided either integrally with or separately from the case body at the sides of the drill blade insertion paths on the second end of the case body, wherein the extension comprises a cut out portion which will be covered by at least concave parts if the concave parts are extended. ### Claim 8 (depends on 7) The stopper storage case of claim 7, further comprising: a measuring concavity comprising a further opening parallel with the plurality of openings formed in the first end of the case body, a further drill blade insertion path parallel with the drill blade insertion paths formed in the second end of the case body, and a further concave part connecting the further opening and the further drill blade insertion path of the measuring concavity; and a scale on the extension, wherein the scale on the extension reads a length from the second end of the stopper to the free end of the blade (Xa) of the drill when the drill (X) is inserted through the measuring concavity opening and the stopper through-hole (Ya) such that the projecting flange (Xc) of the drill abuts the spring engagement portion (Yb) of the stopper and the spring engagement portion is engaged with force. ### Claim 9 (depends on 1) The stopper storage case of claim 1, wherein the stopper case is formed from a material capable of resisting the heat during autoclaved sterilization.