# US 11,027,403 B2 · Hydraulic hammer > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,027,403 B2 - Document ID: US11027403B2 - Status: Granted - Kind: B2 - Application number: 16/011,001 - Filed: 2018-06-18 - Published: 2019-12-19 - Granted: 2021-06-08 - Earliest claimed: 2018-06-18 - Assignees: Caterpillar Inc. - Applicants: Caterpillar Inc. - Inventors: Jordan Beckhusen; Cody Moore; Jason Ray Walker - Web page: https://patentgrep.com/patent/US11027403B2 ## CPC - B25D 9/18: involving a piston-type slide valve - B25D 9/00: Portable percussive tools with fluid-pressure drive, {i.e. driven directly by fluids}, e.g. having several percussive tool bits operated simultaneously {(portable non-percussive drilling tools driven by fluid pressure or pneumatic power B23B45/04)} - B25D 9/04: of the hammer piston type, i.e. in which the tool bit or anvil is hit by an impulse member - B25D 17/00: Details of, or accessories for, portable power-driven percussive tools {(details or components, e.g. casings, bodies, of portable power-driven tools not particularly related to the operation performed B25F5/00)} - B25D 17/24: Damping the reaction force {(resiliently mounted handles B25D17/043; dampers in connections of hammers to backhoes E02F3/966)} - E02F 3/966: {of hammer-type tools (arrangements for breaking-up hard ground E02F5/305; percussion -type rippers E02F5/323)} - B25D 2250/125: Hydraulic tool components - B25D: PERCUSSIVE TOOLS {(percussive machines for forging B21J; hand-held drilling machines, in general B23B45/00, for wood B27C3/08; drilling machines, used for mining or quarrying, with reciprocating tool which is turned intermittently when out of contact with the working face E21B1/00)} - E02F: DREDGING; SOIL-SHIFTING (winning peat E21C49/00) ## Abstract A hydraulic hammer includes a housing defining a cutout and a power cell slidably received within the housing. The power cell includes a valve assembly extending from a side of the power cell. The valve assembly is at least partially received within the cutout of the housing. The hydraulic hammer further includes a pair of wear plates at least partially disposed around the valve assembly of the power cell. Each of the pair of wear plates is coupled to at least one of the power cell and the housing. ## Claims ### Claim 1 A hydraulic hammer comprising: a housing defining a cutout and a longitudinal axis; a power cell slidably received with the housing, the power cell including a valve assembly extending from a side of the power cell, wherein the valve assembly is at least partially received within the cutout of the housing; and a pair of wear plates at least partially disposed around the valve assembly of the power cell, wherein each wear plate includes an elongate section and a pair of lateral sections extending from opposite ends of the elongate section, wherein the elongate section is oriented parallel to the longitudinal axis and each lateral section is oriented perpendicular to the elongate section, and wherein each of the pair of wear plates is coupled to at least one of the power cell and the housing. ### Claim 2 (depends on 1) The hydraulic hammer of claim 1, wherein the cutout is U-shaped. ### Claim 3 (depends on 1) The hydraulic hammer of claim 1, wherein the cutout is defined by an internal wall of the housing. ### Claim 4 (depends on 3) The hydraulic hammer of claim 3, wherein the housing further comprises an external wall spaced apart from the internal wall, and wherein the valve assembly extends through the cutout towards the external wall. ### Claim 5 (depends on 1) The hydraulic hammer of claim 1, wherein each lateral section of each wear plate includes a projecting portion adapted to be removably received within corresponding apertures of the power cell. ### Claim 6 (depends on 1) The hydraulic hammer of claim 1, further comprising a top buffer disposed proximate to a top end of the housing. ### Claim 7 (depends on 6) The hydraulic hammer of claim 6, further comprising a bottom buffer disposed proximate to a bottom end of the housing. ### Claim 8 (depends on 7) The hydraulic hammer of claim 7, further comprising a middle buffer disposed between the top buffer and the bottom buffer. ### Claim 9 A hydraulic hammer comprising: a housing defining a cutout and a longitudinal axis, wherein the cutout is U-shaped; a power cell slidably received within the housing, the power cell including a valve assembly extending from a side of the power cell and a plurality of apertures disposed around the valve assembly, wherein the valve assembly is at least partially received within the cutout of the housing; and a pair of wear plates at least partially disposed around the valve assembly of the power cell, wherein each wear plate includes an elongate section and a pair of lateral sections extending from opposite ends of the elongate section, wherein the elongate section is oriented parallel to the longitudinal axis and each lateral section is oriented perpendicular to the elongate section, and wherein each lateral section of each wear plate includes a peg adapted to be removably received within corresponding apertures of the plurality of apertures of the power cell. ### Claim 10 (depends on 9) The hydraulic hammer of claim 9, wherein the cutout is defined by an internal wall of the housing. ### Claim 11 (depends on 10) The hydraulic hammer of claim 10, wherein the housing further comprises an external wall spaced apart from the internal wall, and wherein the valve assembly extends through the cutout towards the external wall. ### Claim 12 (depends on 9) The hydraulic hammer of claim 9, further comprising a top buffer disposed proximate to a top end of the housing. ### Claim 13 (depends on 12) The hydraulic hammer of claim 12, further comprising a bottom buffer disposed proximate to a bottom end of the housing. ### Claim 14 (depends on 13) The hydraulic hammer of claim 13, further comprising a middle buffer disposed between the top buffer and the bottom buffer. ### Claim 15 A hydraulic hammer comprising: a housing having a top end and a bottom end, wherein the housing defines a cutout and a longitudinal axis; a power cell slidably received within the housing, the power cell including a valve assembly extending from a side of the power cell, wherein the valve assembly is at least partially received within the cutout of the housing; a pair of wear plates at least partially disposed around the valve assembly of the power cell, wherein each wear plate includes an elongate section and a pair of lateral sections extending from opposite ends of the elongate section, wherein the elongate section is oriented parallel to the longitudinal axis and each lateral section is oriented perpendicular to the elongate section, and wherein each of the pair of wear plates is coupled to one of the power cell and the housing; a top buffer disposed proximate to the top end of the housing; and a bottom buffer disposed proximate to the bottom end of the housing. ### Claim 16 (depends on 15) The hydraulic hammer of claim 15, wherein the cutout is U-shaped. ### Claim 17 (depends on 15) The hydraulic hammer of claim 15, wherein the cutout is defined by an internal wall of the housing. ### Claim 18 (depends on 17) The hydraulic hammer of claim 17, wherein the housing further comprises an external wall spaced apart from the internal wall, and wherein the valve assembly extends through the cutout towards the external wall. ### Claim 19 (depends on 15) The hydraulic hammer of claim 15, wherein each lateral section of each wear plate includes a projecting portion adapted to be removably received within corresponding apertures of the power cell. ### Claim 20 (depends on 15) The hydraulic hammer of claim 15, further comprising a middle buffer disposed between the top buffer and the bottom buffer.