# US 2018/0022191 A1 · Suction dampening device with internal dampening for vehicle air conditioning compressor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0022191 A1 - Document ID: US20180022191A1 - Status: Published application - Kind: A1 - Application number: 15/412,204 - Filed: 2017-01-23 - Published: 2018-01-25 - Earliest claimed: 2016-07-21 - Assignees: Hanon Systems - Applicants: Hanon Systems - Inventors: Zoltán Horváth; István Pajor; Dávid Kovács - Web page: https://patentgrep.com/patent/US20180022191A1 ## CPC - F16K 17/0433: {with vibration preventing means} - F16K 15/026: {the valve member being a movable body around which the medium flows when the valve is open} - F16K 17/04: spring-loaded - B60H 2001/006: {Noise reduction} - F04B 27/10: having stationary cylinders - F04B 27/18: by varying the relative positions of a swash plate and a cylinder block - F04B 53/001: {Noise damping} - F04B 53/10: Valves; Arrangement of valves - F04C 18/0215: {where only one member is moving} - F04C 28/18: characterised by varying the volume of the working chamber (by changing the positions of inlet or outlet openings F04C28/10) - F04C 29/06: Silencing (gas-flow silencers or exhaust apparatus for machines or engines in general F01N) - F04C 29/124: {with inlet and outlet valves specially adapted for rotary or oscillating piston pumps} - F04C 2240/30: Casings or housings - F16F 7/08: with friction surfaces rectilinearly movable along each other (F16F7/01 takes precedence {; one of the members being a spring F16F13/02}) - F16F 2222/04: Friction - F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)} - B60H: ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES - F04B: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F) - F04C: ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS (engines F03C); ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS - F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION ## Abstract A suction dampening device comprises a housing with an inlet port formed therein and a valve case disposed adjacent the inlet port. The valve case includes at least one opening formed therein. A valve core is slidably disposed within the valve case. A lever having an axis of rotation fixed to a portion of the valve case includes a first lever arm disposed to a first side of the axis of rotation and a second lever arm disposed to a second side of the axis of rotation. The second lever arm abuts an outer circumferential surface of the valve core. A spring element is disposed between the first lever arm and the valve core. The spring element is configured to apply a force to the first lever arm to cause the second lever arm to apply a lateral force to the valve core to dampen vibrations of the spring element. ## Claims ### Claim 1 A suction dampening device for a compressor comprising: a valve case including a circumferentially extending sidewall having an inner surface; a valve core having an outer surface slidably engaging the inner surface of the sidewall of the valve case; a lever including a first lever arm and a second lever arm formed on opposing sides of an axis of rotation thereof, at least a portion of the second lever arm frictionally engaging the outer surface of the valve core; and a spring element disposed between the first lever arm and the valve core, the spring element configured to urge the first lever arm in an axial direction of the valve case to cause the at least a portion of the second lever arm to engage the outer surface of the valve core. ### Claim 2 (depends on 1) The suction dampening device of claim 1, wherein the second lever arm is disposed within an opening formed in the sidewall of the valve case. ### Claim 3 (depends on 1) The suction dampening device of claim 1, wherein the second lever arm includes a radially extending portion and an axially extending portion, the radially extending portion disposed between the axis of rotation of the lever and the axially extending portion. ### Claim 4 (depends on 3) The suction dampening device of claim 3, wherein the axially extending portion of the second lever arm forms the at least a portion of the second lever arm engaging the outer surface of the valve core. ### Claim 5 (depends on 1) The suction dampening device of claim 1, wherein the force applied to the outer surface of the valve core is applied in a direction transverse to the axial direction of the valve case. ### Claim 6 (depends on 1) The suction dampening device of claim 1, wherein the at least a portion of the second lever arm applies a force to a first side of the outer surface of the valve core to cause a second side of the outer surface of the valve core to engage the inner surface of the sidewall, the second side of the outer surface opposing the first side of the outer surface. ### Claim 7 (depends on 1) The suction dampening device of claim 1, wherein the lever is formed separately from the valve case. ### Claim 8 (depends on 7) The suction dampening device of claim 7, wherein the axis of rotation of the lever is formed between a pivot arm projecting from the lever and a portion of the valve case. ### Claim 9 (depends on 8) The suction dampening device of claim 8, wherein the portion of the valve case is an end cap of the valve case formed at an end of the sidewall thereof. ### Claim 10 (depends on 1) The suction dampening device of claim 1, wherein the lever is formed monolithically with the valve case. ### Claim 11 (depends on 10) The suction dampening device of claim 10, wherein the axis of rotation of the lever is formed by a strip of a material forming a portion of each of the valve case and the lever. ### Claim 12 (depends on 11) The suction dampening device of claim 11, wherein the strip of material extends from an end cap of the valve case to an intersection of the first lever arm and the second lever arm. ### Claim 13 (depends on 1) The suction dampening device of claim 1, wherein the valve case includes at least one opening providing fluid communication between the valve case and a suction chamber of the compressor, the suction chamber having a suction pressure. ### Claim 14 (depends on 13) The suction dampening device of claim 13, further comprising a valve body including a valve seat configured to engage an end of the valve core opposite the spring element, the valve body in fluid communication with a first fluid having a first pressure. ### Claim 15 (depends on 14) The suction dampening device of claim 14, wherein the valve core disengages the valve seat of the valve body in response to a force applied to the valve core by the first pressure exceeding a force applied to the valve core by the suction pressure and the spring element. ### Claim 16 A compressor comprising: a housing including an inlet for receiving a flow of a refrigerant and a suction chamber disposed downstream of the inlet with respect to a flow of the refrigerant, the inlet exposed to a first pressure and the suction chamber exposed to a suction pressure; a valve case including a circumferentially extending sidewall having an inner surface; a valve core having an outer surface slidably engaging the inner surface of the sidewall of the valve case, a first end of the valve core exposed to the first pressure and a second end of the valve core exposed to the suction pressure; a lever including a first lever arm and a second lever arm formed on opposing sides of an axis of rotation thereof, at least a portion of the second lever arm engaging the outer surface of the valve core; and a spring element disposed between the first lever arm and the valve core, the spring element configured to urge the first lever arm in an axial direction of the valve case to cause the at least a portion of the second lever arm to engage the outer surface of the valve core. ### Claim 17 (depends on 16) The compressor according to claim 16, further including a valve body including a valve seat configured to engage the first end of the valve core. ### Claim 18 (depends on 17) The compressor according to claim 17, wherein the first end of the valve core disengages the valve seat of the valve body in response to a force applied to the valve core by the first pressure exceeding a force applied to the valve core by the suction pressure and the spring element. ### Claim 19 (depends on 16) The compressor according to claim 16, wherein the lever is formed monolithically with the valve case and wherein the axis of rotation of the lever is formed by a strip of a material forming a portion of each of the valve case and the lever. ### Claim 20 (depends on 16) The compressor according to claim 16, wherein the axis of rotation of the lever is formed between a pivot arm projecting from the lever and an end cap of the valve case formed at an end of the sidewall thereof.