# US 9,750,867 B2 · Suction device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,750,867 B2 - Document ID: US9750867B2 - Status: Granted - Kind: B2 - Application number: 15/416,190 - Filed: 2017-01-26 - Published: 2017-05-11 - Granted: 2017-09-05 - Earliest claimed: 2009-12-15 - Applicants: Prabhat K. Ahluwalia - Inventors: Prabhat K. Ahluwalia - Web page: https://patentgrep.com/patent/US9750867B2 ## CPC - A61M 1/74: {Suction control (underwater drainage A61M1/61)} - A61M 1/76: {Handpieces (specially for suction-irrigation A61M1/774, aspiration tips A61M1/84)} - A61M 1/84: {Drainage tubes; Aspiration tips (for negative pressure wound therapy A61M1/90; for surgical cutting instruments A61B17/32)} - A61M 1/85: {with gas or fluid supply means, e.g. for supplying rinsing fluids or anticoagulants (for negative pressure wound therapy A61M1/92, A61M1/94; combined with tracheal tubes A61M16/0463; dental instruments with combined rinsing and aspirating A61C17/0208)} - A61M 3/0283: {with at least two inner passageways, a first one for irrigating and a second for evacuating (suction-irrigation systems A61M1/77; aspiration tips with fluid supply means A61M1/85; for negative pressure wound therapy A61M1/92)} - A61M 2025/0019: {Cleaning catheters or the like, e.g. for reuse of the device, for avoiding replacement} - A61M 2205/502: User interfaces, e.g. screens or keyboards - A61M 2205/52: with memories providing a history of measured variating parameters of apparatus or patient - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} ## Abstract A suction device includes an outer tube having an inlet at a first end and an inner suction tube located within the outer tube, the inner suction tube having an inlet at a first end corresponding to the first end of the outer tube. The inlet of the inner suction tube is offset by a distance from the inlet of the outer suction tube, such that the inlet of the inner suction tube is located within the outer suction tube. ## Claims ### Claim 1 A suction device, comprising: an outer tube having an outer inlet at a first outer end; a proximal opening at a proximal end of the outer tube to receive an inner suction tube, wherein the proximal opening is smaller in diameter than the outer tube; and a wall with an inner surface and an outer surface; an inner suction tube to be located within the outer tube, the inner suction tube having an inner inlet at a first inner end corresponding to the first outer end of the outer tube, an inner outlet at a proximal end of the inner suction tube, and a wall with an inner surface and an outer surface, wherein the wall of the inner suction tube includes no openings other than the inlet at the first inner end and the outlet; wherein the inner inlet of the inner suction tube, when the device is fully assembled, is offset by a distance from the outer inlet of the outer tube such that the inner inlet of the inner suction tube is recessed within the outer tube; wherein when a suction pressure is applied to the inner outlet at the proximal end of the inner suction tube and the first outer end of the outer tube contacts a fluid, a first vacuum is formed in a space directly between a proximal portion of the outer surface of the wall of the inner suction tube and a proximal portion of the inner surface of the wall of the outer tube, and a second vacuum is formed within the inner suction tube. ### Claim 2 (depends on 1) The suction device of claim 1, wherein one or more holes through the wall of the outer tube are positioned adjacent to a rim of the outer inlet at the first outer end. ### Claim 3 (depends on 1) The suction device of claim 1, wherein the inner suction tube is configured to perform an irrigation operation. ### Claim 4 (depends on 3) The suction device according to claim 3, wherein the inner suction tube is configured to provide irrigation flowing from the inner outlet towards the inner inlet. ### Claim 5 (depends on 4) The suction device according to claim 4, wherein the outer tube includes a first chamber adjacent to the first outer end and a second chamber with a sidewall proximal to the first chamber; wherein the first chamber is in fluid communication with the second chamber when the device is fully assembled. ### Claim 6 (depends on 5) The suction device according to claim 5, wherein the second chamber includes the proximal opening to receive the inner suction tube. ### Claim 7 (depends on 6) The suction device according to claim 6, wherein the second chamber has a second maximum diameter and the first chamber has a first maximum diameter. ### Claim 8 (depends on 7) The suction device according to claim 7, wherein the distance of the offset is adjustable when the device is fully assembled. ### Claim 9 (depends on 7) The suction device according to claim 7, wherein the inner suction tube is configured to be movable with respect to the outer tube. ### Claim 10 (depends on 9) The suction device according to claim 9, wherein the inner inlet of the inner tube may extend beyond the outer inlet of the outer tube or may be retracted within the outer inlet of the outer tube. ### Claim 11 (depends on 7) The suction device according to claim 7, wherein the inner suction tube is removable with respect to the outer tube. ### Claim 12 (depends on 7) The suction device of claim 7, wherein the sidewall has a sidewall outlet. ### Claim 13 (depends on 12) The suction device according to claim 12, wherein the second maximum diameter of the second chamber is larger than the first maximum diameter of the first chamber. ### Claim 14 (depends on 13) The suction device of claim 13, wherein the inner outlet is in fluid communication with the sidewall outlet through a tube. ### Claim 15 (depends on 14) The suction device of claim 14, wherein the tube includes a stop. ### Claim 16 (depends on 1) The suction device according to claim 1, further comprising at least one spacer positioned between the inner tube and the outer tube to maintain the position of the inner tube with respect to the outer tube. ### Claim 17 (depends on 16) The suction device according to claim 16, wherein the spacer consists of a disc with one or more holes. ### Claim 18 (depends on 1) The suction device according to claim 1, wherein a rim of the inlet of the inner tube includes one or more protrusions, the protrusions extending from the inner tube in a same direction as a length of the inner tube. ### Claim 19 (depends on 1) The suction device according to claim 1, wherein a tab is positioned on the outer surface of the inner suction tube to stop a movement of the inner suction tube in a direction of the outer inlet of the outer tube before a rim of the inner inlet of the inner suction tube reaches a rim of the outer inlet of the outer suction tube. ### Claim 20 (depends on 1) The suction device of claim 1, wherein no holes are positioned adjacent to a rim of the outer inlet of the outer tube.