# US 11,306,797 B2 · Top cap assembly for shock absorber > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,306,797 B2 - Document ID: US11306797B2 - Status: Granted - Kind: B2 - Application number: 16/921,834 - Filed: 2020-07-06 - Published: 2022-01-06 - Granted: 2022-04-19 - Earliest claimed: 2020-07-06 - Assignees: Jihzhan International Co., Ltd. - Applicants: Jihzhan International Co., Ltd. - Inventors: Wei-Li Lin - Web page: https://patentgrep.com/patent/US11306797B2 ## CPC - F16F 9/3484: {characterised by features of the annular discs per se, singularly or in combination} - F16F 9/38: Covers for protection or appearance - F16F 9/3242: {of cylinder ends, e.g. caps} - F16F 2230/0041: Locking; Fixing in position - F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION ## Abstract A top cap assembly for a shock absorber includes a cap which has a first locking member connected to the center thereof, and an inner plate which has a second locking member connected to the center thereof. A first section of a piston rod extends through the first passage of the first locking member and is restricted by the first ridge of the first passage. A second section of the piston rod extends through the second passage of the second locking member and is restricted by the second ridge of the second passage. When installing the top cap assembly to different shock absorbers with different diameters, only the first locking member and the second locking member need to be replaced, and the cap and the inner plate do not need to be replaced. ## Claims ### Claim 1 A top cap assembly for a shock absorber having a coil spring contacting the top cap assembly, a piston rod extending through the top cap assembly, and a top mount plate connected with the piston rod, the top cap assembly comprising: a cap, wherein a top face of the cap includes a first hole defined through a center thereof, the first hole includes a first shoulder and a second shoulder formed in an inner periphery thereof, and a first threaded section is formed between the first and second shoulders; a first locking member connected to the first hole of the cap by a first connection assembly, the first locking member having a first passage defined through a center thereof, a first flange extending radially from an outer periphery thereof, and a second threaded section formed at the outer periphery thereof and located beneath the first flange, wherein the first passage includes at least one first ridge extending from an inner periphery thereof, and a first section of the piston rod extends through the first passage and is restricted by the at least one first ridge; an inner plate located in the cap, wherein an underside of the inner plate contacts a top end of the coil spring; and a second locking member connected to a center of the inner plate by a second connection assembly, the second locking member having a second passage defined through a center thereof, the second passage including at least one second ridge extending from an inner periphery thereof, wherein a second section of the piston rod extends through the second passage and is restricted by the at least one second ridge, wherein the first locking member is connected to the first hole of the cap by the first connection assembly implemented by connection between the first threaded section and the second threaded section, the first flange is rested on the first shoulder, and an underside of the first locking member is rested on the second shoulder. ### Claim 2 (depends on 1) The top cap assembly for a shock absorber as claimed in claim 1, wherein the first connection assembly includes threads. ### Claim 3 (depends on 2) The top cap assembly for a shock absorber as claimed in claim 2, wherein the second connection assembly includes threads. ### Claim 4 A top cap assembly for a shock absorber having a coil spring contacting the top cap assembly, a piston rod extending through the top cap assembly, and a top mount plate connected with the piston rod, the top cap assembly comprising: a cap; a first locking member connected to a center of the cap by a first connection assembly, the first locking member having a first passage defined through a center thereof, the first passage including at least one first ridge extending from an inner periphery thereof, wherein a first section of the piston rod extends through the first passage and is restricted by the at least one first ridge; an inner plate located in the cap, wherein the inner plate includes a second hole defined through a center thereof, the second hole includes a third shoulder and a fourth shoulder formed in an inner periphery thereof, a third threaded section is formed between the third and fourth shoulders, and an underside of the inner plate contacts a top end of the coil spring; and a second locking member connected to the second hole of the inner plate by a second connection assembly, the second locking member having a second passage defined through a center thereof, a third flange and a fourth flange extending radially from an outer periphery thereof, and a fourth threaded section is formed at the outer periphery thereof and located between the third flange and the fourth flange, wherein the second passage includes at least one second ridge extending from an inner periphery thereof, and a second section of the piston rod extends through the second passage and is restricted by the at least one second ridge, wherein the second locking member is connected to the second hole of the inner plate by the second connection assembly implemented by connection between the third threaded section and the fourth threaded section, the third flange contacts the third shoulder, and the fourth flange contacts the fourth shoulder. ### Claim 5 (depends on 4) The top cap assembly for a shock absorber as claimed in claim 4, wherein the first connection assembly includes threads. ### Claim 6 (depends on 5) The top cap assembly for a shock absorber as claimed in claim 5, wherein the second connection assembly includes threads. ### Claim 7 A top cap assembly for a shock absorber having a coil spring contacting the top cap assembly, a piston rod extending through the top cap assembly, and a top mount plate connected with the piston rod, the top cap assembly comprising: a cap, wherein a top face of the cap includes a first hole defined through a center thereof, the first hole includes a first shoulder and a second shoulder formed in an inner periphery thereof, and a first threaded section is formed between the first and second shoulders; a first locking member connected to the first hole of the cap by a first connection assembly, the first locking member having a first passage defined through a center thereof, a first flange extending radially from an outer periphery thereof, and a second threaded section formed at the outer periphery thereof and located beneath the first flange, wherein the first passage includes at least one first ridge extending from an inner periphery thereof, and a first section of the piston rod extends through the first passage and is restricted by the at least one first ridge; an inner plate located in the cap, wherein the inner plate includes a second hole defined through a center thereof, the second hole includes a third shoulder and a fourth shoulder formed in an inner periphery thereof, a third threaded section is formed between the third and fourth shoulders, and an underside of the inner plate contacts a top end of the coil spring; and a second locking member connected to the second hole of the inner plate by a second connection assembly, the second locking member having a second passage defined through a center thereof, a third flange and a fourth flange extending radially from an outer periphery thereof, and a fourth threaded section is formed at the outer periphery thereof and located between the third flange and the fourth flange, wherein the second passage includes at least one second ridge extending from an inner periphery thereof, and a second section of the piston rod extends through the second passage and is restricted by the at least one second ridge, wherein the first locking member is connected to the first hole of the cap by the first connection assembly implemented by connection between the first threaded section and the second threaded section, the first flange is rested on the first shoulder, and an underside of the first locking member is rested on the second shoulder, wherein the second locking member is connected to the second hole of the inner plate by the second connection assembly implemented by connection between the third threaded section and the fourth threaded section, the third flange contacts the third shoulder, and the fourth flange contacts the fourth shoulder. ### Claim 8 (depends on 7) The top cap assembly for a shock absorber as claimed in claim 7, wherein the first connection assembly includes threads. ### Claim 9 (depends on 8) The top cap assembly for a shock absorber as claimed in claim 8, wherein the second connection assembly includes threads.