# US 2019/0170131 A1 · Suction pulsation reduction apparatus of swash plate-type compressor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0170131 A1 - Document ID: US20190170131A1 - Status: Published application - Kind: A1 - Application number: 15/780,565 - Filed: 2017-06-27 - Published: 2019-06-06 - Earliest claimed: 2016-08-24 - Assignees: Hanon Systems - Applicants: Hanon Systems - Inventors: Young Seop Yoon; Seung Taek Lim - Web page: https://patentgrep.com/patent/US20190170131A1 ## CPC - F04B 49/225: {with throttling valves or valves varying the pump inlet opening or the outlet opening} - F04B 27/08: having cylinders coaxial with, or parallel or inclined to, main shaft axis - F04B 27/1009: {Distribution members} - F04B 27/1804: {Controlled by crankcase pressure} - F04B 39/0055: {with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes} - F04B 39/121: {Casings} - F04B 39/123: {Fluid connections} - F04B 39/125: {Cylinder heads} - F04B 53/1022: {having means for guiding the closure member axially} - F04B 53/1027: {the guiding means being provided at both sides of the disc} - F16K 15/026: {the valve member being a movable body around which the medium flows when the valve is open} - F16K 27/0209: {Check valves or pivoted valves} - F04B 2027/1818: {Suction pressure} - F04B 2027/1881: {Suction pressure} - Y10T 137/7937: Cage-type guide for stemless valves - 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) - 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)} - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract The present invention relates to a suction pulsation reducing device of a swash plate type compressor, and more particularly, to a suction pulsation reduction apparatus provided on a suction channel formed in a rear head of a swash plate type compressor, in which a moving range of a core portion is limited and all parts to be mounted on a suction channel are integrally formed in a case. ## Claims ### Claim at position 1 1-13. (canceled) ### Claim 14 A suction pulsation reduction apparatus provided on a suction channel formed in a rear head of a swash plate type compressor, comprising: a case including an inlet located at a suction port side and having one side opened in a longitudinal direction, an outlet formed by making a predetermined region on an outer circumferential surface hollow, and a latching portion protruding outwardly from the outer circumferential surface of the end part of the case a core portion moving in the longitudinal direction in the case according to a suction pressure of the coolant introduced from the inlet to control an opening/closing area of the inlet; and an elastic spring inserted into the case and seated on the other side surface of the case to elastically support the core portion. ### Claim 15 (depends on 14) The suction pulsation reduction apparatus of claim 14, further comprising: a core hook portion protruding inwardly in a predetermined region on an inner circumferential surface of the case; and a hook moving groove extending in the longitudinal direction on an outer circumferential surface of the core portion at a position corresponding to the core hook portion and depressed inwardly. ### Claim 16 (depends on 15) The suction pulsation reduction apparatus of claim 15, wherein the hook moving groove extends from a point spaced by a predetermined distance from the other end in the longitudinal direction of the core portion. ### Claim 17 (depends on 15) The suction pulsation reduction apparatus of claim 15, wherein a predetermined region of one end of the core portion which is located at the inlet side is provided with a chamfer portion formed to have a diameter gradually reducing. ### Claim 18 (depends on 15) The suction pulsation reduction apparatus of claim 15, wherein the case is integrally formed with the core hook portion by injection molding. ### Claim 19 (depends on 3) The suction pulsation reduction apparatus of claim 3, wherein the core hook portion protrudes at a point spaced by a predetermined distance from the other end in the longitudinal direction of the case, and the distance spaced from the other end is equal to or shorter than a length of the hook moving groove. ### Claim 20 (depends on 16) The suction pulsation reduction apparatus of claim 16, further comprising: a core guide protruding inwardly in a predetermined region on the inner circumferential surface of the case and extending from one side to the other side in the longitudinal direction, and a guide moving groove extending in the longitudinal direction on an outer circumferential surface of the core portion at a position corresponding to the core guide and depressed inwardly. ### Claim 21 (depends on 20) The suction pulsation reduction apparatus of claim 20, wherein the number of core guides and the number of core hook portions are at least one. ### Claim 22 (depends on 20) The suction pulsation reduction apparatus of claim 20, wherein the core guide and the core hook portion are disposed at positions corresponding to each other with respect to a center of the core portion on the outer circumferential surface of the core portion. ### Claim 23 (depends on 14) The suction pulsation reduction apparatus of claim 14, wherein the latching portion protrudes outwardly along the edge of one end of the case and protrudes while being spaced at regular intervals in a circumferential direction. ### Claim 24 (depends on 14) The suction pulsation reduction apparatus of claim 14, further comprising: a body hook portion protruding outwardly in a predetermined region on the outer circumferential surface of the case and further protruding gradually toward the inlet. ### Claim 25 (depends on 24) The suction pulsation reduction apparatus of claim 24, wherein the number of body hook portions is at least one. ### Claim 26 (depends on 14) A swash plate type compressor including the suction pulsation reduction apparatus of claim 14, wherein the latching portion is seated on a groove protruding on the suction channel, and a body hook portion is latched to a hook coupling portion depressed into the groove at a position corresponding to the body hook portion of the case.