# US 9,435,352 B2 · Drive lever arrangement > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,435,352 B2 - Document ID: US9435352B2 - Status: Granted - Kind: B2 - Application number: 14/115,347 - Filed: 2012-04-24 - Published: 2014-03-06 - Granted: 2016-09-06 - Earliest claimed: 2011-05-18 - Assignees: Siemens Aktiengesellschaft - Applicants: Philip Twell - Inventors: Philip Twell - Web page: https://patentgrep.com/patent/US9435352B2 ## CPC - F04D 29/60: Mounting; Assembling; Disassembling {(F04D13/10 takes precedence)} - F01D 17/10: Final actuators (valves in general F16K {; blades with variable camber F01D5/148}) - F01D 17/162: {for axial flow, i.e. the vanes turning around axes which are essentially perpendicular to the rotor centre line (F01D17/167 takes precedence)} - F05D 2260/30: Retaining components in desired mutual position - F05D 2260/50: Kinematic linkage, i.e. transmission of position - Y10T 29/49321: Assembling individual fluid flow interacting members, e.g., blades, vanes, buckets, on rotary support member - Y10T 29/49959: Nonresilient fastener - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) - F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D) - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A drive lever arrangement is provided. The drive lever arrangement includes a unison ring which has a groove; a drive lever having connection means for connecting the drive lever to the unison ring; a drive lever pin having a transversal throughbore hole; and a clip, wherein the drive lever pin connects the drive lever to the unison ring, and wherein the clip is inserted in the groove through the throughbore hole of the drive lever pin, and engages with the groove of the unison ring. ## Claims ### Claim 1 A drive lever arrangement comprising: a unison ring which comprises a groove; a drive lever; a drive lever pin comprising a transversal throughbore hole, said drive lever pin for connecting the drive lever to the unison ring; and a clip, wherein the drive lever pin connects the drive lever to the unison ring, and wherein the clip is inserted in the groove through the throughbore hole of the drive lever pin, and engages with the groove of the unison ring to inhibit rotation of the drive lever pin, or wherein the drive lever pin further comprises a circumferential collar element, wherein the circumferential collar element is adapted to engage with the groove, and wherein the clip is inserted through the throughbore hole of the drive lever pin. ### Claim 2 (depends on 1) The drive lever arrangement as claimed in claim 1, wherein the clip comprises a first leg and bent second leg, wherein the first leg and the bent second leg are connected by a spring part. ### Claim 3 (depends on 2) The drive lever arrangement as claimed in claim 2, wherein the bent second leg comprises a first region where a distance between the first leg of the clip and the bent second leg of the clip increases and a second region where the distance between the first leg of the clip and the bent second leg of the clip decreases. ### Claim 4 (depends on 1) The drive lever arrangement as claimed in claim 1, wherein the unison ring comprises a protrusion extending from a compact portion of the unison ring, and wherein the protrusion comprises a hole which is adapted in such a way that the drive lever pin is insertable into the hole. ### Claim 5 (depends on 1) The drive lever arrangement as claimed in claim 1, wherein the drive lever pin comprises a head part, and wherein the transversal throughbore hole is arranged in the head part of the drive lever pin. ### Claim 6 (depends on 1) The drive lever arrangement as claimed in claim 1, wherein the circumferential collar element may extend over an angle between 15 degrees and 315 degrees of the perimeter of the drive lever pin. ### Claim 7 (depends on 1) The drive lever arrangement as claimed in claim 1, wherein the drive lever pin comprises an element for turning the drive lever pin. ### Claim 8 (depends on 1) The drive lever arrangement according to claim 1, wherein the clip is a R-shaped clip. ### Claim 9 A method of placing a drive lever pin in a drive lever arrangement, wherein the drive lever arrangement comprises a unison ring comprising a groove, a drive lever, and a drive lever pin comprising a transversal throughbore hole, said drive lever pin for connecting the drive lever to the unison ring, wherein the method comprises: connecting the drive lever to the unison ring with the drive lever pin, inserting a clip in the groove through the throughbore hole of the drive lever pin, and inhibiting rotation of the drive lever pin based on the inserting the clip through the throughbore hole of the drive lever pin. ### Claim 10 (depends on 9) The method of placing a drive lever pin in a drive lever arrangement as claimed in claim 9, wherein the drive lever pin comprises a circumferential collar element, the method further comprises: turning the drive lever pin so that the circumferential collar element of the drive lever pin engages in the groove of the unison ring. ### Claim 11 (depends on 9) The method of placing the drive lever pin in the drive lever arrangement as claimed in claim 9, wherein the throughbore hole of the drive lever pin is perpendicular to a main axis of the drive lever pin. ### Claim 12 (depends on 9) The method of placing the drive lever pin in the drive lever arrangement as claimed in claim 9, wherein the clip includes a bent leg and a straight leg, and wherein the inserting step comprises inserting the straight leg through the throughbore hole of the drive lever pin. ### Claim 13 (depends on 12) The method of placing the drive lever pin in the drive lever arrangement as claimed in claim 12, wherein the clip is a R-shaped clip and wherein the inserting step further comprises angling the bent leg away from the straight leg. ### Claim 14 (depends on 12) The method of placing the drive lever pin in the drive lever arrangement as claimed in claim 12, further comprising gripping an outer perimeter of the drive level pin with the bent leg. ### Claim 15 (depends on 9) The method of placing the drive lever pin in the drive lever arrangement as claimed in claim 9, wherein the connecting step includes inserting the drive lever pin through a throughbore hole in a first rail of the unison ring and inserting the drive lever pin through a throughbore hole in a second rail of the unison ring, wherein the throughbore holes in the first and second rails have different diameters. ### Claim 16 (depends on 15) The method of placing the drive lever pin in the drive lever arrangement as claimed in claim 15, wherein the throughbore hole in the first rail has a larger diameter than the throughbore hole in the second rail and wherein the inserting step comprises engaging a head part of the drive lever pin with the throughbore hole in the first rail and engaging a shaft part of the drive lever pin with the throughbore hole in the second rail, wherein the head part has a larger diameter than the shaft part of the drive lever pin.