# US 2017/0282175 A1 · Fluid inspection device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0282175 A1 - Document ID: US20170282175A1 - Status: Published application - Kind: A1 - Application number: 15/346,326 - Filed: 2016-11-08 - Published: 2017-10-05 - Earliest claimed: 2016-03-29 - Assignees: Lite-On Electronics (Guangzhou) Limited; Lite-On Technology Corporation - Applicants: Lite-On Electronics (Guangzhou) Co., Ltd.; Lite-On Technology Corporation - Inventors: Szu-Hsien Ho; Chia-Chun Wei; Hung-Wei Chen - Web page: https://patentgrep.com/patent/US20170282175A1 ## CPC - B01L 3/502: {with fluid transport, e.g. in multi-compartment structures} - B01L 3/502723: {characterised by venting arrangements} - B01L 3/50273: {characterised by the means or forces applied to move the fluids} - G01N 33/52: Use of compounds or compositions for colorimetric, spectrophotometric or fluorometric investigation, e.g. use of reagent paper {and including single- and multilayer analytical elements (immunological elements G01N33/54386; involving labelled immunochemicals G01N33/58; for haemoglobin or occult blood G01N33/72)} - G01N 33/525: {Multi-layer analytical elements} - B01L 2200/0684: Venting, avoiding backpressure, avoid gas bubbles - B01L 2300/0825: Test strips - B01L 2300/0848: Specific forms of parts of containers - B01L 2300/0851: Bottom walls - B01L 2300/0864: comprising only one inlet and multiple receiving wells, e.g. for separation, splitting - B01L 2300/0887: Laminated structure - B01L 2300/089: Virtual walls for guiding liquids - B01L 2400/0406: capillary forces - B01L: CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) ## Abstract The present invention provides a fluid inspection device comprising at least one channel including a top channel surface and a bottom channel surface, and a first spacing formed therebetween; at least one chamber communicating with the at least one channel from which a fluid flows into the at least one chamber and including a top chamber surface, a bottom chamber surface and a fluid-filling area and a through opening communicating with the at least one chamber and the outside. A second spacing is formed between the top chamber surface of at least one portion of the fluid-filling area and a corresponding bottom chamber surface thereof, wherein the second spacing is smaller than the first spacing. The fluid inspection device prevents bubbles from producing in the chamber and obstructing the inspection and further allows less required fluid amount in the chamber. ## Claims ### Claim 1 A fluid inspection device, comprising: at least one channel including a top channel surface and a bottom channel surface, wherein a first spacing is formed therebetween; at least one chamber communicating with the at least one channel from which a fluid flows into the at least one chamber and including a top chamber surface, a bottom chamber surface and a fluid-filling area, wherein a second spacing is formed between the top chamber surface of at least a portion of the fluid-filling area and the bottom chamber surface corresponding to the at least a portion of the fluid-filling area; and a through opening communicating with the at least one chamber and an outside. ### Claim 2 (depends on 1) The fluid inspection device as claimed in claim 1, wherein a surface is formed at at least one of the top chamber surface and the bottom chamber surface around the fluid-filling area to form a step between the surface and at least one of the top chamber surface and the bottom chamber surface of the at least a portion of the fluid-filling area. ### Claim 3 (depends on 2) The fluid inspection device as claimed in claim 2, wherein the at least one chamber further includes a lateral wall connected to at least one of the top chamber surface and the bottom chamber surface, and an interval is formed between the lateral wall and a periphery of the fluid-filling area. ### Claim 4 (depends on 2) The fluid inspection device as claimed in claim 2, wherein at least one of the top chamber surface and the bottom chamber surface of the at least a portion of the fluid-filling area has a paraboloid. ### Claim 5 A fluid inspection device, comprising: a test strip, including: a plurality of channels, each of which includes a top channel surface and a bottom channel surface, wherein a first spacing is formed therebetween; a plurality of chambers respectively communicating with the plurality of channels from which a fluid flows into the plurality of chambers, wherein each of the plurality of chambers includes a top chamber surface, a bottom chamber surface and a fluid-filling area, and a second spacing is formed between the top chamber surface of at least a portion of the fluid-filling area and the bottom chamber surface corresponding to the at least a portion of the fluid-filling area; and at least one through opening communicating with the plurality of chambers and an outside. ### Claim 6 (depends on 5) The fluid inspection device as claimed in claim 5, wherein a surface is formed at at least one of the top chamber surface and the bottom chamber surface around the fluid-filling area to form a step between the surface and the at least one of the top chamber surface and the bottom chamber surface of the at least a portion of the fluid-filling area. ### Claim 7 (depends on 6) The fluid inspection device as claimed in claim 6, wherein each of the plurality of chambers further includes a lateral wall connected to at least one of the top chamber surface and the bottom chamber surface, and an interval is formed between the lateral wall and a periphery of the fluid-filling area. ### Claim 8 (depends on 7) The fluid inspection device as claimed in claim 7, wherein at least one of the top chamber surface and the corresponding bottom chamber surface of the at least a portion of the fluid-filling area in each of the plurality of chambers has a paraboloid. ### Claim 9 (depends on 7) The fluid inspection device as claimed in claim 7, wherein the test strip includes a first sheet and a second sheet, the first sheet and the second sheet are configured opposite to each other, the plurality of channels and the plurality of chambers are configured between the first sheet and the second sheet, and the at least one through opening includes a plurality of through openings configured to communicate with the plurality of corresponding chambers respectively, wherein: the first sheet includes a plurality of top chamber portions and a plurality of top channel portions, the plurality of top chamber portions are connected to the plurality of corresponding top channel portions respectively, each of the plurality of top chamber portions has the top chamber surface and includes a first fluid-filling forming piece and a first groove, and the first fluid-filling forming piece is formed by extending from an end of the top channel portion in the first sheet and is surrounded by the first groove; and the second sheet includes a plurality of bottom chamber portions and a plurality of bottom channel portions, the plurality of bottom chamber portions are connected to the plurality of corresponding bottom channel portions respectively, and each of the plurality of bottom chamber portions has the bottom chamber surface, wherein each of the plurality of top chamber portions and each of the plurality of corresponding bottom chamber portions form each of the plurality of chambers, each of the plurality of top channel portions and each of the plurality of corresponding bottom channel portions form each of the plurality of channels, and the first fluid-filling forming piece and the corresponding bottom chamber surface form the fluid-filling area. ### Claim 10 (depends on 9) The fluid inspection device as claimed in claim 9, wherein the first groove is configured to be recessed on an inner surface of the first sheet and forms the interval between the lateral wall and the periphery of the fluid-filling area, and the step is formed between a wall of the first groove and the top chamber surface of the fluid-filling area. ### Claim 11 (depends on 10) The fluid inspection device as claimed in claim 10, wherein the first fluid-filling forming piece includes a stem portion and a main portion, the stem portion is connected to the end of the top channel portion, and a paraboloid is formed on the an inner side of the main portion. ### Claim 12 (depends on 9) The fluid inspection device as claimed in claim 9, wherein the through opening is configured on the first groove, or the first groove is a through groove. ### Claim 13 (depends on 9) The fluid inspection device as claimed in claim 9, wherein the plurality of bottom chamber portions and the plurality of bottom channel portions respectively include a plurality of concave chambers and a plurality of concave channels recessed on the upper surface of the second sheet. ### Claim 14 (depends on 9) The fluid inspection device as claimed in claim 9, wherein each of the plurality of bottom chamber portions includes a second fluid-filling forming piece corresponding to the first fluid-filling forming piece and a second groove corresponding to the first groove, and the fluid-filling area is formed by the first fluid-filling forming piece and the second fluid-filling forming piece. ### Claim 15 (depends on 5) The fluid inspection device as claimed claim 5, wherein the test strip further includes a fluid-containing trough configured at one end of the test strip to fill the fluid and communicate with the plurality of channels, wherein a shorter one of the plurality of channels has a smaller width and a longer one of the plurality of channels has a larger width so that the fluid filled in the fluid-containing trough enters in the plurality of chambers at the same time via the plurality of channels respectively. ### Claim 16 (depends on 15) The fluid inspection device as claimed in claim 15, wherein the plurality of channels are radially configured, and the plurality of chambers are linearly configured at the other end of the test strip. ### Claim 17 (depends on 15) The fluid inspection device as claimed in claim 15, wherein the test strip includes a first sheet and a second sheet, the first sheet and the second sheet are configured opposite to each other, the plurality of channels and the plurality of chambers are configured between the first sheet and the second sheet, the fluid-containing trough is configured to be recessed on an upper surface of the second sheet and has a front portion and a rear portion, the front portion is an opening for the fluid to be filled in, and the rear portion is covered by the first sheet so that the fluid is absorbed into the plurality of channels.