# US 2008/0185551 A1 · Ball poppet valve with contoured control stem > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2008/0185551 A1 - Document ID: US20080185551A1 - Status: Published application - Kind: A1 - Application number: 12/026,762 - Filed: 2008-02-06 - Published: 2008-08-07 - Earliest claimed: 2007-02-07 - Assignees: Kendrion Binder Magnete GmbH - Inventors: Florian Schulz; Gerd Strobel - Web page: https://patentgrep.com/patent/US20080185551A1 ## CPC - F16K 1/36: Valve members (for double-seat valves F16K1/44 {; for butterfly valves F16K1/222, F16K1/223}) - F16K 1/42: Valve seats (for double-seat valves F16K1/44) - F16K 31/0662: {with a ball-shaped valve member} - F16K 31/0665: {with valve member being at least partially ball-shaped (F16K31/0662 takes precedence)} - 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)} ## Abstract The invention relates to a ball poppet valve having a valve body, a cylindrical valve bore disposed in the valve body, a ball poppet for closing the valve bore and a movable control stem intruding into the valve bore. The control stem acts on the ball poppet, and the control stem has a diameter (d) that at least approximately becomes larger and larger in the direction towards the ball poppet. ## Claims ### Claim 1 A ball poppet valve comprising: a valve body, a cylindrical valve bore disposed in the valve body, a ball poppet for controllably opening and closing the valve bore and a movable control stem within the valve bore, to move the ball poppet, wherein the control stem has a diameter that increases along a longitudinal axis of the movable control stem in a direction toward the ball poppet. ### Claim 2 (depends on 1) The ball poppet valve of claim 1, wherein the valve bore comprises a circumferential control edge along a valve aperture at the ball end. ### Claim 3 (depends on 2) The ball poppet valve of claim 2, wherein a flow cross section of the ball poppet valve is bounded by the circumferential control edge and a circumferential annular surface of the control stem. ### Claim 4 (depends on 1) The ball poppet valve of claim 1, wherein the diameter of the control stem increases in linear or piecewise linear fashion. ### Claim 5 (depends on 1) The ball poppet valve of claim 1, wherein the diameter of the control stem increases according to a continuous or piecewise continuous function. ### Claim 6 (depends on 1) The ball poppet valve of claim 1, comprising a spring disposed on a side of the ball poppet lying opposite the control stem. ### Claim 7 (depends on 6) The ball poppet valve claim 6, comprising an electromagnetic actuating unit for moving the control stem. ### Claim 8 (depends on 1) The ball poppet valve of claim 1, wherein the ball poppet is formed integrally with the control stem. ### Claim 9 (depends on 8) The ball poppet valve of claim 8, wherein a tension spring or a compression spring is disposed at the outlet end of the control stem. ### Claim 10 (depends on 6) The ball poppet valve of claim 6, where the spring comprises a compression or tension spring. ### Claim 11 A ball poppet valve, comprising: a ball poppet; a valve body that provides a valve bore; and a control stem configured and arranged to controllably move along the valve bore, where the control stem comprises a distal end and a proximate end where the distal end is located adjacent to the valve poppet and the control stem includes a first lengthwise segment located at the proximate end and having a fixed diameter and a second lengthwise segment that has a expanding diameter moving lengthwise along the control stem to the distal end of the control stem. ### Claim 12 (depends on 11) The ball poppet valve of claim 11, where the ball poppet and the control stem are formed from a single unitary piece. ### Claim 13 (depends on 11) The ball poppet valve of claim 11, comprising an electromagnetic actuating unit that applies a force to the control stem to open the valve bore to flow. ### Claim 14 (depends on 13) The ball poppet valve of claim 13, comprising a spring that provides a force on the control stem that biases the control stem such that the valve bore is nominally closed. ### Claim 15 (depends on 11) The ball poppet valve of claim 11, where side walls of the second lengthwise segment expand outwardly from an axial center line of the control stem that is located co-axially within the valve bore in a direction closer to the distal end than the first lengthwise segment. ### Claim 16 (depends on 11) The ball poppet valve of claim 11, where in an axial direction along the second lengthwise segment of the valve stem the cross sectional area of the valve stem increases approaching the distal end. ### Claim 17 A ball poppet valve, comprising: a ball poppet; a valve body that provides a valve bore; and a control stem configured and arranged to controllably move along the co-axial valve bore, where the control stem comprises a distal end and a proximate end where the distal end is affixed to the valve poppet and the control stem includes a first lengthwise segment located at the proximate end and having a constant cross sectional area and a second lengthwise segment that has an increasing cross sectional area diameter moving lengthwise along the control stem to the distal end of the control stem.