# US 9,518,380 B2 · Tool retention system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,518,380 B2 - Document ID: US9518380B2 - Status: Granted - Kind: B2 - Application number: 14/155,766 - Filed: 2014-01-15 - Published: 2015-07-16 - Granted: 2016-12-13 - Earliest claimed: 2014-01-15 - Assignees: Caterpillar Inc. - Applicants: Caterpillar Inc. - Inventors: Patrick Campomanes - Web page: https://patentgrep.com/patent/US9518380B2 ## CPC - E02F 9/2841: {resilient} - Y10T 29/49863: with prestressing of part - E02F: DREDGING; SOIL-SHIFTING (winning peat E21C49/00) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A retention system is provided for use with a ground engaging tool. The tool retention system may have a spool with an elongated channel, and a collar dividing the elongated channel into a first portion and a second portion. The tool retention system may also have a fastener disposed within the elongated channel and passing through the collar. The fastener may have a head located within the first portion and a threaded shank located within the second portion. The tool retention system may further have a resilient member disposed between the head of the fastener and the collar, and a slider threadingly engaged with the threaded shank and configured to slide within the second portion of the elongated channel as the fastener is rotated. ## Claims ### Claim 1 A tool retention system, comprising: a spool having an elongated channel, and a collar dividing the elongated channel into a first portion and a second portion; a fastener disposed within the elongated channel and passing through the collar, the fastener having a head located within the first portion and a threaded shank located within the second portion; a resilient member disposed between the head of the fastener and the collar; and a slider threadingly engaged with the threaded shank and configured to slide within the second portion of the elongated channel as the fastener is rotated, wherein the slider includes at least one protrusion that extends axially toward the collar, and the collar is notched to allow passage of the at least one protrusion. ### Claim 2 (depends on 1) The tool retention system of claim 1, further including a wedge configured to interlock with the slider. ### Claim 3 (depends on 1) The tool retention system of claim 1, wherein the collar includes a depression configured to seat the resilient member. ### Claim 4 (depends on 1) The tool retention system of claim 1, wherein: the spool includes an end stop located a distance away from the collar; and the resilient member is configured to bias the head of the fastener away from the collar and against the end stop. ### Claim 5 (depends on 2) The tool retention system of claim 2, wherein outer surfaces of the spool and wedge are curved. ### Claim 6 (depends on 1) The tool retention system of claim 1, wherein the spool includes spaced apart arms that extend in a direction away from the wedge. ### Claim 7 (depends on 1) The tool retention system of claim 1, wherein the spool further includes a pocket located at an end of the elongated channel opposite the collar, the pocket configured to allow selective disengagement of the slider from the wedge. ### Claim 8 (depends on 7) The tool retention system of claim 7, wherein the pocket increases in depth at greater distances away from the collar. ### Claim 9 A tool retention system, comprising: a spool having an elongated channel, a collar dividing the elongated channel into a first portion and a second portion, and a pocket formed within the second portion at an end opposite the collar; a fastener disposed within the elongated channel and passing through the collar, the fastener having a head located within the first portion and a threaded shank located within the second portion; a slider threadingly engaged with the threaded shank and configured to slide within the second portion of the elongated channel as the fastener is rotated; and a wedge configured to selectively interlock with the slider only when the slider is out of the pocket, wherein the slider includes at least one protrusion that extends axially toward the collar, and wherein the collar is notched to allow passage of the at least one protrusion. ### Claim 10 (depends on 9) The tool retention system of claim 9, wherein the collar includes an annular depression. ### Claim 11 (depends on 10) The tool retention system of claim 10, wherein: the spool includes an end stop located a distance away from the collar; and the head of the fastener is located between the collar and against the end stop. ### Claim 12 (depends on 9) The tool retention system of claim 9, wherein outer surfaces of the spool and wedge are curved. ### Claim 13 (depends on 9) The tool retention system of claim 9, wherein the spool includes spaced apart arms that extend in a direction away from the wedge. ### Claim 14 (depends on 9) The tool retention system of claim 9, wherein the pocket increases in depth at greater distances away from the collar. ### Claim 15 A tool retention system, comprising: a spool having an elongated channel, and a collar dividing the elongated channel into a first portion and a second portion; a fastener disposed within the elongated channel and passing through the collar, the fastener having a head located within the first portion and a threaded shank located within the second portion; a Belleville washer or a spring disposed between the head of the fastener and the collar; and a slider threadingly engaged with the threaded shank and configured to slide within the second portion of the elongated channel as the fastener is rotated, wherein the slider includes at least one protrusion that extends axially toward the collar, and the collar is notched to allow passage of the at least one protrusion.