# US 8,783,672 B2 · Rack apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,783,672 B2 - Document ID: US8783672B2 - Status: Granted - Kind: B2 - Application number: 13/209,563 - Filed: 2011-08-15 - Published: 2012-07-05 - Granted: 2014-07-22 - Earliest claimed: 2010-12-29 - Assignees: Hon Hai Precision Industry Co., Ltd. - Applicants: Bing Guo; Mao-Lin Li; Xi-Hua Xu - Inventors: Bing Guo; Mao-Lin Li; Xi-Hua Xu - Web page: https://patentgrep.com/patent/US8783672B2 ## CPC - C25D 17/08: {Supporting} racks {, i.e. not for suspending} - C25D 11/005: {Apparatus specially adapted for electrolytic conversion coating (apparatus in general for electrolytic coating C25D17/00)} - C25D: PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR ## Abstract A rack apparatus used for retaining a workpiece having at least one threaded hole, includes a hanging frame, and at least one clamping assembly fixed on the hanging frame. Each clamping assembly includes a plurality of latching members and a plurality of connecting members detachably assembled on the latching members. Each connecting member includes a screw portion. At least one screw portion is engaged in a corresponding threaded hole of the workpiece. ## Claims ### Claim 1 A rack apparatus used for retaining a workpiece comprising at least one threaded hole, comprising: a hanging frame; at least one clamping assembly fixed to the hanging frame, the at least one clamping assembly comprising a plurality of latching members and a plurality of connecting members detachably fixed on the latching members, wherein each of the connecting members comprises a screw portion, and at least one screw portion is engaged in a corresponding threaded hole of the workpiece; each of the latching members comprises a main body and two latching portions extending towards each other from two opposite ends of the main body, each of the latching portions defining a latching notch at a distal end of the latching portion away from the main body to fix the connecting member to the latching member. ### Claim 2 (depends on 1) The rack apparatus of claim 1, wherein each of the connecting members further comprises a cylindrical body defining a latching groove, and the latching notch engages with the latching groove to fix the connecting member to the latching member. ### Claim 3 (depends on 2) The rack apparatus of claim 2, wherein each of the connecting members further comprises a connecting portion extending out from an end of the cylindrical body, and the screw portion extends out from an end of the connecting portion away from the cylindrical body. ### Claim 4 (depends on 3) The rack apparatus of claim 3, wherein the connecting portion is conical, and the diameter of the connecting portion gradually decreases from an end of the connecting member adjacent to the cylindrical body to the other end of connecting portion adjacent to the screw portion. ### Claim 5 (depends on 3) The rack apparatus of claim 3, wherein each of the connecting members further comprises a diametric groove defined at a distal end of the cylindrical body away from the connecting portion, and each of the latching members comprises a post protruding from a distal end of the main body engaged by means of the diametric groove to secure the connecting member in place. ### Claim 6 (depends on 4) The rack apparatus of claim 4, wherein each of the connecting members is integrally formed. ### Claim 7 (depends on 1) The rack apparatus of claim 1, wherein the hanging frame comprises a pole member, a hanging member jointed to the top of the pole member, and a plurality of supporting members attached at the pole member. ### Claim 8 (depends on 7) The rack apparatus of claim 7, wherein the hanging member further comprises a connecting portion and two hanging hooks respectively at either end of the connecting portion. ### Claim 9 (depends on 7) The rack apparatus of claim 7, wherein of the plurality of the supporting member members comprises two first supporting poles and a second supporting pole between the two first supporting poles. ### Claim 10 (depends on 9) The rack apparatus of claim 9, wherein the two first supporting poles and the second supporting pole are attached to the pole member at a same side of the pole member and are parallel with each other. ### Claim 11 (depends on 9) The rack apparatus of claim 9, wherein the at least one clamping assembly further comprises a resisting member comprising a base portion attached to an end of the second supporting pole and two latching hooks detachably assembled on the two opposite ends of the base portion. ### Claim 12 (depends on 11) The rack apparatus of claim 11, wherein the base portion is made of a structurally and chemically durable metal. ### Claim 13 (depends on 12) The rack apparatus of claim 12, wherein the base portion is made of titanium alloy. ### Claim 14 (depends on 11) The rack apparatus of claim 11, wherein the latching hook is made of aluminum alloy.