# US 7,406,753 B2 · Two-piece tie down clip for sheet material > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,406,753 B2 - Document ID: US7406753B2 - Status: Granted - Kind: B2 - Application number: 11/505,379 - Filed: 2006-08-17 - Published: 2008-02-21 - Granted: 2008-08-05 - Earliest claimed: 2006-08-17 - Inventors: Patrick J. LaScala - Web page: https://patentgrep.com/patent/US7406753B2 ## CPC - E04H 15/64: Tent or canopy cover fastenings - F16B 5/0692: {joining flexible sheets to other sheets or plates or to strips or bars (tent fastenings E04H15/64; coping elements for swimming pools with fixing means for sealing foil E04H4/142; greenhouses of flexible synthetic material A01G9/1407; end or aperture-closing arrangements or devices for sacks or bags B65D33/16)} - Y10T 24/44043: Channel and inserted bar - E04H: BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL (foundations E02D) - F16B: DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING (couplings for transmitting rotation F16D) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A two-piece clip for tying down a sheet of material has an elongated triple tapered wedge insertable in a mating triple tapered groove. The two components bind the covering material therebetween with a tight friction fit and compress a relatively large area of material, especially plastic material with a built-in reinforcing fiber grid. The clip binds a large number of rows and columns of reinforcing elements of a plastic cover sheet in a tight friction fit therebetween for a secure grip and easy release without damaging the material. ## Claims ### Claim 1 A two-piece clip device for tying down a sheet of material, the device comprising: an elongated triple tapered groove clip component positioned on one side of a sheet of material, the groove clip component comprising a flat outer bottom portion for bearing indicia thereon, and a top surface having a triple tapered groove open along the length of the top surface, the groove tapering inwardly from side to side from a wide front opening in a front face of the groove clip component to a narrow back opening in a back face of the groove clip component, the groove tapering from a low front opening at the front face to a high opening at the back face and the groove tapering from a narrower top slot opening to a wider flat groove bottom surface of the groove to form sloping inner sides of the groove, the flat groove bottom surface comprising a flat smooth plane from the front face to the back face; and a mating elongated triple tapered wedge clip component positioned on an opposite side of the sheet of material aligned with the groove clip component for engagement therewith to bind a portion of the sheet of material therebetween, the wedge clip component comprising a triple tapered wedge portion with a flat wedge bottom which slides into the mating triple tapered groove of the groove clip component with the flat wedge bottom and the flat groove bottom surface in parallel alignment sandwiching a portion of the sheet of material therebetween with the flat wedge bottom in full sliding contact with the top of the material and the flat groove bottom in full sliding contact with the bottom of the material and an upwardly protruding loop positioned entirely above the wedge bottom so that the loop does not interfere with the full contact of the wedge bottom with the top of the material and the simultaneous full contact of the groove bottom with the bottom of the material during an entire insertion of the wedge clip component into the groove clip component with the upwardly protruding loop extending above the wedge clip component for gripping by a user to install the wedge portion in the groove portion, the loop positioned above a narrow insertion end of the wedge clip component for gripping the wedge clip component to slide the wedge clip component into the mating triple tapered groove of the groove clip component and for attaching a tie down element through the protruding loop for tying down the sheet of material after installation of a series of mating groove clip components and wedge clip components spaced apart along a length of the material, the triple tapered wedge portion tapering from the narrow insertion end insertable in the wide front opening of the groove of the wedge clip component to a wide opposite binding end so that the wedge clip component is engaged by the low front opening of the groove clip component after insertion of the wedge clip component in the groove clip component, the wedge clip component tapering from a high insertion end which engages the high back end of the groove clip component after insertion to a low binding end which engages with the low front opening of the groove clip component after insertion with the material therebetween, and the wedge clip component outer sides tapering from a narrow top to a wider flat bottom to form sloping outer sides so that the sloping outer sides of the wedge clip component engage the sloping inner sides of the wedge clip component with the material therebetween after insertion and the flat wedge bottom engages the flat groove bottom after insertion with the material therebetween, thereby forming a two-piece clip device to bind any desired portion of the sheet of material between the wedge clip component and the groove clip component with the portion of the sheet of material sandwiched between the clip components, so that a series of two-piece clip devices spaced apart around a sheet of material at any desired locations on the sheet of material each engage a portion of the sheet of material and each of the protruding loops receives a tie down element attached thereto to tie down the sheet of material, each of the two-piece clip devices having a length and width sufficient to bind a portion of the sheet of material and securely hold it down without tearing the sheet of material. ### Claim 2 (depends on 1) The device of claim 1 wherein the sheet of material comprises a sheet with a grid pattern of intersecting reinforcing elements formed in the sheet of material and the two-piece clip device has a width sufficient to engage a plurality of reinforcing elements and a length sufficient to engage a plurality of reinforcing elements. ### Claim 3 (depends on 1) The device of claim 1 wherein the wedge clip component and groove clip component are each fabricated of a synthetic nylon material so that the components slide easily and resist weathering. ### Claim 4 (depends on 1) The device of claim 1 wherein the sheet of material is a sheet of cover material and a series of the two-piece clip devices are positioned as desired on the sheet of cover material adjacent to tie down locations on an object to be covered. ### Claim 5 (depends on 4) The device of claim 4 wherein the sheet of material is a sheet of cover material for a boat and a series of the two-piece clip devices are positioned as desired on the sheet of cover material adjacent to tie down locations on the boat to be covered. ### Claim 6 (depends on 5) The device of claim 5 wherein the sheet of cover material for a boat comprises a sheet of synthetic material with a grid pattern of intersecting horizontal and vertical reinforcing elements formed in the sheet of material and the two-piece clip device has a width sufficient to engage a plurality of vertical reinforcing elements and a length sufficient to engage a plurality of horizontal reinforcing elements when the two-piece clip is attached with a long centerline of the two-piece clip in a vertical orientation.