# US 9,872,943 B1 · Pistol grip suction device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,872,943 B1 - Document ID: US9872943B1 - Status: Granted - Kind: B1 - Application number: 15/386,323 - Filed: 2016-12-21 - Granted: 2018-01-23 - Earliest claimed: 2015-03-30 - Assignees: The United States of America as represented by the Secretary of the Air Force - Applicants: The United States of America, as Represented by the Secretary of the Air Force - Inventors: Andrew Hall; Hampton L McClendon - Web page: https://patentgrep.com/patent/US9872943B1 ## CPC - A61M 1/774: {Handpieces specially adapted for providing suction as well as irrigation, either simultaneously or independently} - A61M 1/7413: {by changing the cross-section of the line} - A61M 1/743: {by changing the cross-section of the line, e.g. flow regulating valves (A61M1/7413 takes precedence)} - A61M 1/772: {operating alternately} - 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 pistol grip suction device comprises a hollow body member having first leg joining second leg at elbow, the legs being generally tubular and disposed approximately 90 degrees apart; a push rod extending through push rod aperture at elbow, the push rod extending into hollow second leg, the push rod having a button on proximal end outside the body, and valve on distal end inside the body; a valve seat disposed within second leg around push rod; valve mounted on the push rod through the valve seat, the suction port having a diameter at least two times the diameter of push rod through suction port; a spring biasing push rod into extended position with respect to second leg such that valve bears against valve seat and closes suction port, wherein a force against button greater than biasing force of spring displaces valve from valve seat and opens suction port. ## Claims ### Claim 1 A pistol grip suction device comprising: a hollow body member having a first leg joining a second leg at an elbow, the first leg and the second leg being generally tubular and disposed at an angle from each other; a push rod extending through a push rod aperture at the elbow, the push rod extending into the hollow second leg of the body, the push rod having a button on a proximal end outside the body, and a valve on a distal end inside the body; a valve seat disposed within the second leg around the push rod, the valve seat oriented perpendicular to the longitudinal axis of the second leg, the valve seat having a circular suction port extending therethrough; the valve mounted on the push rod, the valve having a diameter larger than the suction port through the valve seat, the suction port having a diameter at least two times greater than the diameter of the push rod that extends through the suction port, the push rod being radially-movable within the suction port to contact the edges of the suction port; a spring biasing the push rod into an extended position with respect to the second leg such that the valve bears against the valve seat and thereby closes the suction port, wherein a force against the button which is greater than the biasing force of the spring displaces the valve from the valve seat and opens the suction port. ### Claim 2 (depends on 1) The pistol grip suction device of claim 1, further comprising: an irrigation port through a wall of the second leg on the same side of the valve seat as the valve. ### Claim 3 (depends on 1) The pistol grip suction device of claim 1, wherein the valve includes a complementary profile to that of the valve seat. ### Claim 4 (depends on 1) The pistol grip suction device of claim 1, wherein the valve seat has a planar face perpendicular to the longitudinal axis of the second leg that bears against the valve under the influence of the biasing spring. ### Claim 5 (depends on 1) The pistol grip suction device of claim 1, wherein the valve seat has an inwardly-tapered face that draws the valve into a centered position on the suction port under the influence of the biasing spring. ### Claim 6 (depends on 1) The pistol grip suction device of claim 1, wherein the circumference of the valve includes a rounded edge that generally complements a rounded groove around the suction port of the valve seat. ### Claim 7 (depends on 1) The pistol grip suction device of claim 1, wherein the valve is one of a ball or hemisphere that bears against the valve seat to seal the suction port. ### Claim 8 (depends on 7) The pistol grip suction device of claim 7, wherein the valve seat includes a planar face perpendicular to the longitudinal axis of the second leg, which planar face bears the valve when the suction port is closed. ### Claim 9 (depends on 1) The pistol grip suction device of claim 1, further comprising: a suction wand removably attached to the second leg opposite the push rod aperture.