# US 5,334,434 A · Vibration or shock absorbing member > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,334,434 A - Document ID: US5334434A - Status: Granted - Kind: A - Application number: 07/832,961 - Filed: 1992-02-10 - Granted: 1994-08-02 - Earliest claimed: 1991-02-15 - Assignees: Matsushita Electric Industrial Co., Ltd. - Inventors: Tomio Shiota; Toshiharu Hikida; Masashi Sugimoto; Kazuhiko Kodama; Kaoru Shimizu - Web page: https://patentgrep.com/patent/US5334434A ## CPC - B29C 45/006: {Joining parts moulded in separate cavities} - B29C 45/16: Making multilayered or multicoloured articles {(B29C45/0062 takes precedence; feeding colouring materials into the injection unit B29C45/1816)} - B29C 45/1704: {the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles (B29C45/1732 and B29C45/1734 take precedence; injection blow-moulding B29C49/06)} - F16F 1/376: having projections, studs, serrations or the like on at least one surface ({F16F1/3835} , F16F1/387 take precedence) - F16F 2226/00: Manufacturing; Treatments - Y10T 428/2457: Parallel ribs and/or grooves - Y10T 428/24661: Forming, or cooperating to form cells - Y10T 428/24744: Longitudinal or transverse tubular cavity or cell - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A vibration or shock absorbing member which is composed of a material capable of effecting injection molding such as plastics, rubber, ceramics, metallic powder mixed and kneaded with a specified binder, or glass powder mixed and kneaded with a specified binder, and includes an integral structure, a plurality of protrusions formed at least on one main flat surface of the integral structure, and a plurality of independent hollow portions provided symmetrically or in an aligned state within the integral structure through intersecting partition walls. Such integral structure is molded as one unit by one-shot molding (molding at one time) or by a single molding die for expanding the range of selection for materials and spring constants so as to achieve freedom in the choice of shapes and reduction in weight. ## Claims ### Claim 1 A vibration or shock absorbing member which comprises an integral structure, a plurality of protrusions formed at least on one main flat surface of said integral structure in a matrix pattern, partition walls intersecting each other in the integral structure, and a plurality of independent hollow portions formed under said protrusions within the integral structure through said intersections partition walls in the matrix pattern, said integral structure being formed into one piece by a one-shot molding. ### Claim 2 (depends on 1) A vibration of shock absorbing member as claimed in claim 1, wherein said member is composed of a material capable of effecting injection molding, said material selected from the group consisting of plastics, rubber and ceramics. ### Claim 3 (depends on 1) A vibration or shock absorbing member according to claim 1, wherein each of said intersecting partition walls are substantially orthogonal to said one main flat surface. ### Claim 4 A vibration or shock absorbing member which comprises an integral structure, a plurality of thin walled protrusion and a plurality of first hollow portions corresponding in shape to said thin walled protrusions formed at least on one main flat surface of said integral structure in a matrix pattern, partition walls intersecting each other in the integral structure, and a plurality of independent second hollow portions, each of said second hollow portions formed within said integral structure through said intersection partition walls independently in the matrix pattern so as to be commonly communicated with the plurality of said first hollow portions, said integral structure being formed into one piece by a one-shot molding. ### Claim 5 (depends on 4) A vibration or shock absorbing member as claimed in claim 4, wherein said member is composed of a material capable of effecting injection molding, said material selected from the group consisting of plastics, rubber and ceramics. ### Claim 6 (depends on 4) A vibration or shock absorbing member according to claim 4, wherein each of said intersecting partition walls are substantially orthogonal to said one main flat surface. ### Claim 7 A vibration or shock absorbing member which comprises an integral structure, a plurality of protrusion formed at least on one main flat surface of said integral structure in a matrix pattern, partition walls intersecting each other in the integral structure, and a plurality of independent hollow portions, each of said hollow portions formed within the integral structure through said intersecting partition walls in the matrix pattern, said integral structure being formed into one piece with a single injection mold and also by sliding said one injection mold for secondary molding. ### Claim 8 (depends on 7) A vibration or shock absorbing member as claimed in claim 7, wherein said member is composed of a material capable of effecting injection molding, said material selected from the group consisting of plastics, rubber and ceramics. ### Claim 9 (depends on 7) A vibration or shock absorbing member according to claim 7, wherein each of said intersecting partition walls are substantially orthogonal to said one main flat surface. ### Claim 10 A vibration or shock absorbing member which comprises an integral structure, a plurality of thin walled protrusions and formed a plurality of first hollow portions corresponding in shape to said thin walled protrusions formed at least on one main flat surface of said integral structure in a matrix pattern, partition walls intersecting each other in the integral structure, and a plurality of independent second hollow portions, each of said second hollow portions. each of said second hollow portions formed within said integral structure through said intersecting partition walls independently in the matrix pattern so as to be commonly communicated with the plurality of said first hollow portions, said integral structure being formed into one piece by one injection mold and also by sliding said one injection mold for secondary molding. ### Claim 11 (depends on 7) A vibration or shock absorbing member as claimed in claim 7, wherein said member is composed of a material capable of effecting injection molding, said material selected from the group consisting of plastics, rubber and ceramics. ### Claim 12 (depends on 10) A vibration or shock absorbing member according to claim 10, wherein each of said intersecting partition walls are substantially orthogonal to said one main flat surface. ### Claim 13 A vibration or shock absorbing member which comprises an integral structure, a plurality of protrusions formed at least on one main flat surface of said integral structure in a matrix pattern, partition walls intersecting each other in the integral structure, and a plurality of independent hollow portions formed under said protrusions within the integral structure through said intersecting partition walls in the matrix pattern. ### Claim 14 (depends on 13) A vibration or shock absorbing member according to claim 13, wherein each of said intersecting partition walls are substantially orthogonal to said one main flat surface. ### Claim 15 A vibration or shock absorbing member which comprises an integral structure, a plurality of thin walled protrusions and a plurality of first hollow portions corresponding in shape to said thin walled protrusions formed at least on one main flat surface of said integral structure in a matrix pattern, partition walls intersecting each other in the integral structure, and a plurality of independent second hollow portions formed under said walled protrusions within said integral structure through said intersecting partition walls independently in the matrix pattern so as to be commonly communicated with the plurality of said first hollow portions. ### Claim 16 (depends on 15) A vibration or shock absorbing member according to claim 15, wherein each of said intersecting partition walls are substantially orthogonal to said one main flat surface. ### Claim 17 A vibration or shock absorbing member which comprises an integral structure, a plurality of protrusion formed at least on one main flat surface of said integral structure in a matrix pattern, partition walls intersecting each other on one level in the integral structure, and a plurality of independent hollow portions each having an area larger than that of each of said protrusions and formed under said protrusions within the integral structure through said intersecting partition walls in the matrix pattern. ### Claim 18 (depends on 17) A vibration or shock absorbing member according to claim 17, wherein each of said intersecting partition walls are substantially orthogonal to said one main flat surface.