# US 11,439,875 B2 · Golf club head or other ball striking device having impact-influencing body features > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,439,875 B2 - Document ID: US11439875B2 - Status: Granted - Kind: B2 - Application number: 16/990,787 - Filed: 2020-08-11 - Published: 2020-11-26 - Granted: 2022-09-13 - Earliest claimed: 2014-06-20 - Assignees: Karsten Manufacturing Corporation - Applicants: Karsten Manufacturing Corporation - Inventors: Joshua M. Boggs; Kevin Harper; Eric A. Larson; Michael T. Prichard; Hiromitsu Akiyama; Yoshimasa Fujita - Web page: https://patentgrep.com/patent/US11439875B2 ## CPC - A63B 53/04: Heads - A63B 60/00: Details or accessories of golf clubs, bats, rackets or the like - A63B 53/0466: {wood-type} - A63B 53/0408: {characterised by specific dimensions, e.g. thickness} - A63B 53/0433: {with special sole configurations} - A63B 53/045: {Strengthening ribs} - A63B 60/002: {Resonance frequency related characteristics} - A63B 2053/0491: {with added weights, e.g. changeable, replaceable} - A63B 2209/00: Characteristics of used materials - A63B: APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT (apparatus for passive exercising, massage A61H) ## Abstract A ball striking device, such as a golf club head, has a face with a striking surface configured for striking a ball and a channel extending across a portion of the sole. The channel may be recessed from adjacent surfaces of the sole and have a depth of recession from the adjacent surfaces of the sole. The channel may have a cross-sectional profile that is asymmetric with a front wall and a rear wall where the front wall is longer than the rear wall. The channel may also have a center thickness that is different than a thickness at the heel and toe sides. ## Claims ### Claim 1 A golf club head comprising: a face having a striking surface configured for striking a ball; a body connected to the face and extending rearward from the face, the body having a crown, a sole, a heel, a hosel, and a toe; and a channel extending across a portion of the sole in a heel to toe direction, wherein the channel is recessed from adjacent surfaces of the sole and has a depth of recession from the adjacent surfaces of the sole, wherein the channel comprises a center portion extending across a center of the sole, a heel portion extending from a heel end of the center portion toward the heel, and a toe portion extending from a toe end of the center portion toward the toe, wherein the channel comprises a rear wall, a front wall, a front edge, a rear edge, and a width defined between the front and rear edges, and wherein the width of the center portion of the channel is substantially constant, and the width of the channel at both the heel and toe portions is greater than the width of the center portion; wherein an angle in a range between 75 and 90 degrees is formed between the front wall and the rear wall, in a cross-section defined by a plane positioned perpendicular to a ground plane in a front-to-back direction through the center portion of the channel; wherein the center portion of the channel has an asymmetric cross-sectional shape where the front wall of the center portion has a first length and the rear wall of the center portion has a second length; wherein the first length is greater than the second length; wherein the center portion of the channel comprises an expanded trough positioned between the front wall and the rear wall; wherein the expanded trough comprises a first wall connected to the front wall, a second wall connected to the rear wall, a bottom positioned between the first wall and the second wall, and a top defined by a plane extending through a intersection of the front wall and the first wall and a intersection of the rear wall and the second wall; and wherein the bottom of the expanded trough defines a greatest depth of recession from the adjacent surfaces of the sole. ### Claim 2 (depends on 1) The golf club head of claim 1, wherein the hosel comprises a hosel interconnecting structure; and wherein an access for the hosel interconnection structure is in communication with and intersects the heel portion of the channel. ### Claim 3 (depends on 1) The golf club head of claim 1, wherein the front and rear edges of the channel are angled away from each other at the heel portion and toe portion such that the width of the channel at the heel portion increases from the heel end of the center portion to the heel of the club head, and the toe portion increases from the toe end of the center portion to the toe of the club head. ### Claim 4 (depends on 1) The golf club head of claim 1, wherein the first wall is connected to the front wall such the first wall extends away and in a different direction from the front wall. ### Claim 5 (depends on 1) The golf club head of claim 1, wherein the narrowest width portions of the heel and toe portions of the channel are immediately adjacent the center portion of the channel. ### Claim 6 (depends on 1) The golf club head of claim 1, wherein the depth of the center portion is within a range of 2.5 mm to 3.5 mm. ### Claim 7 (depends on 1) The golf club head of claim 1, wherein the front wall of the center portion and the rear wall of the center portion have a linear shape in a cross-section defined by a plane positioned perpendicular to a ground plane in a front-to-back direction through the center portion of the channel. ### Claim 8 (depends on 1) The golf club head of claim 1, wherein the center portion of the channel comprises a midpoint and two ends; and wherein the depth of the channel is greatest at the midpoint and is shallower more proximate each of the two ends. ### Claim 9 (depends on 1) The golf club head of claim 1, wherein the heel portion of the channel comprises a forward heel portion, a rear heel portion, and a heel rib member where the heel rib member separates the forward heel portion from the rear heel portion; and wherein the toe portion of the channel comprises a forward toe portion, a rear toe portion, and a toe rib member where the toe rib member separates the forward toe portion from the rear toe portion. ### Claim 10 (depends on 9) The golf club head of claim 9, wherein the forward heel portion has a depth that differs from a depth of the rear heel portion; and the forward toe portion has a depth that differs from a depth of the rear toe portion. ### Claim 11 A golf club head comprising: a face having a striking surface configured for striking a ball; a body connected to the face and extending rearward from the face, the body having a crown, a sole, a heel, a hosel, and a toe; and a channel extending across a portion of the sole in a heel to toe direction, wherein the channel is recessed from adjacent surfaces of the sole and has a depth of recession from the adjacent surfaces of the sole, wherein the channel comprises a center portion extending across a center of the sole, a heel portion extending from a heel end of the center portion toward the heel, and a toe portion extending from a toe end of the center portion toward the toe, wherein the channel comprises a rear wall, a front wall, a front edge, a rear edge, and a width defined between the front and rear edges, and wherein the width of the center portion of the channel is substantially constant, and the width of the channel at both the heel and toe portions is greater than the width of the center portion; wherein an angle in a range between 90 and 120 degrees is formed between the front wall and the rear wall, in a cross-section defined by a plane positioned perpendicular to a ground plane in a front-to-back direction through the center portion of the channel; wherein the center portion of the channel has an asymmetric cross-sectional shape where the front wall of the center portion has a first length and the rear wall of the center portion has a second length; wherein the first length is greater than the second length; wherein the center portion of the channel comprises an expanded trough positioned between the front wall and the rear wall; wherein the expanded trough comprises a first wall connected to the front wall, a second wall connected to the rear wall, a bottom positioned between the first wall and the second wall, and a top defined by a plane extending through a intersection of the front wall and the first wall and a intersection of the rear wall and the second wall; and wherein the bottom of the expanded trough defines a greatest depth of recession from the adjacent surfaces of the sole. ### Claim 12 (depends on 11) The golf club head of claim 11, wherein the hosel comprises a hosel interconnecting structure; and wherein an access for the hosel interconnection structure is in communication with and intersects the heel portion of the channel. ### Claim 13 (depends on 11) The golf club head of claim 11, wherein the front and rear edges of the channel are angled away from each other at the heel portion and toe portion such that the width of the channel at the heel portion increases from the heel end of the center portion to the heel of the club head, and the toe portion increases from the toe end of the center portion to the toe of the club head. ### Claim 14 (depends on 11) The golf club head of claim 11, wherein the first wall is connected to the front wall such the first wall extends away and in a different direction from the front wall. ### Claim 15 (depends on 11) The golf club head of claim 11, wherein the narrowest width portions of the heel and toe portions of the channel are immediately adjacent the center portion of the channel. ### Claim 16 (depends on 11) The golf club head of claim 11, wherein the depth of the center portion is within a range of 2.5 mm to 3.5 mm. ### Claim 17 (depends on 11) The golf club head of claim 11, wherein the front wall of the center portion and the rear wall of the center portion have a linear shape in a cross-section defined by a plane positioned perpendicular to a ground plane in a front-to-back direction through the center portion of the channel. ### Claim 18 (depends on 11) The golf club head of claim 11, wherein the center portion of the channel comprises a midpoint and two ends; and wherein the depth of the channel is greatest at the midpoint and is shallower more proximate each of the two ends. ### Claim 19 (depends on 11) The golf club head of claim 11, wherein the heel portion of the channel comprises a forward heel portion, a rear heel portion, and a heel rib member where the heel rib member separates the forward heel portion from the rear heel portion; and wherein the toe portion of the channel comprises a forward toe portion, a rear toe portion, and a toe rib member where the toe rib member separates the forward toe portion from the rear toe portion. ### Claim 20 (depends on 19) The golf club head of claim 19, wherein the forward heel portion has a depth that differs from a depth of the rear heel portion; and the forward toe portion has a depth that differs from a depth of the rear toe portion.