# US 7,410,154 B2 · Fluid damper > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,410,154 B2 - Document ID: US7410154B2 - Status: Granted - Kind: B2 - Application number: 10/577,117 - Filed: 2004-11-04 - Published: 2007-07-12 - Granted: 2008-08-12 - Earliest claimed: 2003-11-05 - Assignees: Harn Marketing Sdn Bhd - Inventors: Harn Lian Lam; Harn Yan Lam - Web page: https://patentgrep.com/patent/US7410154B2 ## CPC - E05F 5/02: specially for preventing the slamming of {swinging} wings {during final closing movement, e.g. jamb stops} - F16F 9/3405: {Throttling passages in or on piston body, e.g. slots (F16F9/344, F16F9/3481 take precedence)} - F16F 9/512: Means responsive to load action, {i.e. static load} on the damper or {dynamic} fluid pressure {changes} in the damper, {e.g. due to changes in velocity (F16F9/504, F16F9/516 take precedence; non-automatic damper adjustment from a distance using servo control, the servo pressure being created by the flow of damping fluid F16F9/465; self-pumping fluid springs in vehicle suspensions B60G17/044)} - E05F 5/10: with piston brakes - E05Y 2201/21: Brakes - E05Y 2201/256: with pistons or vanes - E05Y 2201/264: linear - E05Y 2201/474: Compression springs - E05F: DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING - F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION - E05Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF ## Abstract The invention is a fluidic damper which comprises a closed cylinder (100) containing a valve mechanism. The valve mechanism is attached to a piston rod (110), a portion of which (the piston rod) emerges through an opening in one end wall of the cylinder (100). The valve mechanism (90) comprises a disc (10) with an axle (15), a rotatable annular cover piece (20) and an annular turning piece (40). A spring (30) is disposed between the cover piece (20) and the turning piece (40). ## Claims ### Claim 1 A fluidic damper comprising: a closed cylinder filled with fluid, containing a valve mechanism attached to a piston rod, a portion of said piston rod emerges through an opening in an end wall of the cylinder, wherein a disc portion having multiple passages for fluid to flow from one side of said disc to the other side, and a shaft with at least one guide members disposed on the surface of said shaft at an angle; a rotatable annular cover piece which rotates about the said shaft, such that rotation of the cover piece in one direction closes said passages and in the other direction opens up said passages; an annular turning piece, which is structurally connected to the cover piece, having a retention mechanism for holding itself onto said guide member wherein the retention mechanism fits or engages slidingly to said guide member on the surface of the said shaft, so that the turning piece rotates when the retention mechanism slides along the guide member; a resilient means disposed between the said turning piece and said cover piece, to push the turning piece back to its original position and consequently rotates the cover piece to a position that opens up the passages of said disc. ### Claim 2 (depends on 1) A fluidic damper according to claim 1 wherein the guide member is a ridge and the retention mechanism is a notch on the inner surface of the turning piece. ### Claim 3 (depends on 2) A fluidic damper according to claim 2 wherein the resilient means is a spring wound around the said shaft. ### Claim 4 (depends on 2) A fluidic damper according to claim 2 wherein the turning piece is structurally connected to the cover piece by means of claws extending from the cover piece to the said turning piece. ### Claim 5 (depends on 3) A fluidic damper according to claim 3 wherein the turning piece is structurally connected to the cover piece by means of claws extending from the cover piece to the said turning piece. ### Claim 6 (depends on 1) A fluidic damper according to claim 1 wherein the guide member is a groove and the retention mechanism is a knob extending from the inner surface of the turning piece. ### Claim 7 (depends on 6) A fluidic damper according to claim 6 wherein the turning piece is structurally connected to the cover piece by means of claws extending from the cover piece to the said turning piece. ### Claim 8 (depends on 6) A fluidic damper according to claim 6 wherein the turning piece is structurally connected to the cover piece by means of claws extending from the cover piece to the said turning piece. ### Claim 9 (depends on 1) A fluidic damper according to claim 1, wherein the shaft is a hollow tube to receive the piston rod therethrough. ### Claim 10 (depends on 9) A fluidic damper as claimed in claim 9, wherein said piston rod is retained across said valve mechanism with a pair of retaining means mounted onto said piston rod against said turning piece and said disc portion respectively. ### Claim 11 (depends on 10) A fluidic damper according to claim 10, wherein the fluidic damper further comprises a spring which connects the closed end of the cylinder at one end and rested on said retaining means at the other end. ### Claim 12 (depends on 1) A fluidic damper according to claim 1 wherein the resilient means is a spring wound around the said shaft. ### Claim 13 (depends on 12) A fluidic damper according to claim 12 wherein the turning piece is structurally connected to the cover piece by means of claws extending from the cover piece to the said turning piece. ### Claim 14 (depends on 1) A fluidic damper as claimed in claim 1, wherein said shaft is partially hollowed to receive said piston rod. ### Claim 15 (depends on 14) A fluidic damper as claimed in claim 14, wherein said shaft having a locking portion which is extended therefrom and said locking portion is mounted with a retaining means having extensions and flanges for retaining said unitary piece of disc portion at one side and said spring of the cylinder at the other side. ### Claim 16 (depends on 1) A fluidic damper according to claim 1 wherein the turning piece is structurally connected to the cover piece by means of claws extending from the cover piece to the said turning piece. ### Claim 17 (depends on 1) A fluidic damper according to claim 1, wherein said multiple passages of the disc are formed with parts of the circular periphery of said disc are removed forming the openings to allow the fluid to pass there through. ### Claim 18 (depends on 1) A fluidic damper according to claim 1, wherein said multiple passages of the disc are formed with openings punctuated adjacent the circular periphery of said disc.