# US 8,465,695 B2 · Washing test apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,465,695 B2 - Document ID: US8465695B2 - Status: Granted - Kind: B2 - Application number: 10/555,502 - Filed: 2004-04-30 - Published: 2007-03-08 - Granted: 2013-06-18 - Earliest claimed: 2003-05-03 - Assignees: Albert Browne Limited - Applicants: Richard Bancroft - Inventors: Richard Bancroft - Web page: https://patentgrep.com/patent/US8465695B2 ## CPC - A61B 90/70: Cleaning devices specially adapted for surgical instruments - A61B 2090/702: {Devices for testing the cleaning process, e.g. test soils} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract Washing efficacy test apparatus (2) is provided which includes a holder (4) and a test soil device (6) for location with said holder (4). The test soil device (6) is in the form of sheet material with a test soil substance (34) provided thereon. The holder in one example includes two members (8, 10) between which the test soil device (6) is detachably attached so that the device (6) can be easily removed for inspection and maintained in a required orientation in the washing apparatus (2) in use. ## Claims ### Claim 1 A washing test apparatus comprising: a sheet of material comprising an indicator, the indicator comprising a colorant, a protein, a lipid, and a polysaccharide; and a holding device comprising at least first and second members joined together by a hinge, at least a portion of said first and/or second members being capable of undergoing relative movement between an open position and a closed position to allow for removable insertion of said sheet therebetween, and a spring positioned between the first and second members to bias said portion of said first and/or second members toward the closed position, wherein said sheet is removably retained between said portion of the first and/or second members while in the closed position, and said portion includes two or more surfaces provided in different directions, angles and/or orientations relative to each other, said sheet following the contours of said surfaces when located therebetween to allow multi-directional wash testing and to maintain said sheet in position during use. ### Claim 2 (depends on 1) The apparatus according to claim 1 wherein while said portion of said first and/or second members is in the closed position, the first and second members are substantially parallel and adjacent each other. ### Claim 3 (depends on 1) The apparatus according to claim 1 wherein the first and/or second members further comprise a handle portion. ### Claim 4 (depends on 1) The apparatus according to claim 1, wherein one of said first and second members includes said two or more surfaces. ### Claim 5 (depends on 1) The apparatus according to claim 1, wherein the two or more surfaces include opposing surfaces of the first and second members. ### Claim 6 (depends on 1) The apparatus according to claim 1, wherein each of said first and second members is provided with a first surface and a second surface substantially perpendicular thereto. ### Claim 7 (depends on 1) The apparatus according to claim 1, wherein said portion of said first and/or second members that removably retains said sheet is provided with one or more apertures therein. ### Claim 8 (depends on 7) The apparatus according to claim 7, wherein the apertures of said first and second members are substantially aligned. ### Claim 9 (depends on 7) The apparatus according to claim 7, wherein the apertures are provided in a grid like arrangement. ### Claim 10 (depends on 7) The apparatus according to claim 7, wherein the apertures are in the form of a mesh. ### Claim 11 (depends on 1) The apparatus according to claim 1, wherein the first and second members further comprise a handle portion and the spring is positioned between the handle portion of the first and second members to resiliently bias the first and second members to said closed position. ### Claim 12 (depends on 1) The apparatus according to claim 1, wherein the spring attaches the first and second members together. ### Claim 13 (depends on 1) The apparatus according to claim 1, wherein said portion that removably retains the sheet is substantially round, substantially cylindrical, substantially semi-circular, or any combination thereof. ### Claim 14 (depends on 1) The apparatus according to claim 1, wherein said portion that removably retains the sheet is tapered. ### Claim 15 (depends on 1) The apparatus according to claim 1, wherein the first and/or second members are substantially round, substantially semi-circular, or any combination thereof. ### Claim 16 (depends on 1) The apparatus according to claim 1, wherein the indicator is printed onto a surface of the sheet. ### Claim 17 (depends on 1) The apparatus according to claim 1, wherein the sheet of material is formed from a plastic material. ### Claim 18 (depends on 1) The apparatus according to claim 1, wherein the sheet of material is substantially transparent. ### Claim 19 (depends on 1) The apparatus according to claim 1, wherein the sheet of material is opaque. ### Claim 20 (depends on 1) The apparatus according to claim 1, wherein a portion of the sheet of material protrudes from the first and/or second members when in position therebetween in use. ### Claim 21 (depends on 1) The apparatus according to claim 1, wherein both of said first and second members include said two or more surfaces.