# US 11,306,489 B2 · Electronic trowel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,306,489 B2 - Document ID: US11306489B2 - Status: Granted - Kind: B2 - Application number: 17/034,924 - Filed: 2020-09-28 - Published: 2021-01-28 - Granted: 2022-04-19 - Earliest claimed: 2018-10-03 - Assignees: Laticrete International, Inc. - Applicants: Laticrete International, Inc. - Inventors: Matthew David Carli - Web page: https://patentgrep.com/patent/US11306489B2 ## CPC - E04F 21/241: {Elongated smoothing blades or plates, e.g. screed apparatus} - E04F 21/161: {Trowels} - E04F 21/162: {with a blade having a notched or toothed edge} - G01B 21/30: for measuring roughness or irregularity of surfaces - G01N 33/383: {Concrete or cement} - E04F: FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS (windows, doors E06B) - G01B: MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) ## Abstract Electronic trowels, systems and methods of applying a layer of material using the present electronic trowels. The various electronic trowels include a handle, at least one blade, and one or more sensors residing on or within the trowel. The trowel is for applying a layer of material over a surface area, whereby the one or more sensors detect and collect material installation data during application of the layer of material over the surface area. One or more electronic devices coupled to the one or more sensors receive and analyze the collected installation data for monitoring and controlling the application of the layer of material to ensure a desired end product is achieved. Application errors may be detected before, during, or after the installation process. ## Claims ### Claim 1 A method for applying a layer of material using an electronic trowel comprising: identifying a surface area; providing a material to be applied over the surface area; providing a trowel having a handle, at least one blade, and one or more sensors residing on or within the trowel; applying the material to the surface area using the trowel while the one or more sensors detect and collect working conditions of the trowel and installation data during application of the layer of material over the surface area; transmitting the installation data to one or more electronic devices coupled to the one or more sensors; and analyzing the collected installation data via the one or more electronic devices to identify and correct for any errors in the application of the layer of material to ensure a desired end product is achieved. ### Claim 2 (depends on 1) The method of claim 1 wherein the one or more electronic devices analyzing the collected installation data to identify any errors in the application of the layer of material for correction by an installer during the installation process. ### Claim 3 (depends on 1) The method of claim 1 wherein the one or more electronic devices analyzing the collected installation data to identify any errors in the application of the layer of material for correction by an installer after the installation process. ### Claim 4 (depends on 1) The method of claim 1 wherein the one or more sensors are attached to the handle of the trowel. ### Claim 5 (depends on 1) The method of claim 1 wherein the one or more sensors are attached to the at least one blade of the trowel. ### Claim 6 (depends on 1) The method of claim 1 wherein the trowel further includes a shank attaching the handle to the blade, the one or more sensors are attached to the shank. ### Claim 7 (depends on 1) The method of claim 1 wherein the one or more sensors comprise one or more blades of the trowel. ### Claim 8 (depends on 1) The method of claim 1 wherein the one or more sensors detect and measure temperature, location, infrared, ultrasound, pH, movement, or optics. ### Claim 9 (depends on 1) The method of claim 1 wherein the one or more sensors detect a height and a pattern of the applied layer of material for determining whether any slumping of ridges of the applied layer of material is present within the applied layer of material. ### Claim 10 (depends on 9) The method of claim 9 wherein the one or more sensors comprise infrared sensors, ultrasound sensors, or movement sensors that detect the height and the pattern of the applied layer of material. ### Claim 11 (depends on 1) The method of claim 1 wherein the trowel comprises a hand-held trowel, a standing trowel, or a mechanical trowel. ### Claim 12 (depends on 1) The method of claim 1 wherein the one or more sensors capture forces and stresses exerted on the end user for using in ensuring installer safety. ### Claim 13 (depends on 1) The method of claim 1 wherein the working conditions detected are used to determine whether the mixture of the material being applied has a correct proportion of material to water prior to use thereof. ### Claim 14 (depends on 13) The method of claim 13 wherein the one or more sensors detect a density of the layer of material to ensure a homogenous mixture of the material being applied. ### Claim 15 (depends on 13) The method of claim 13 wherein the one or more sensors comprise temperature sensors that detect a temperature of the working conditions. ### Claim 16 (depends on 13) The method of claim 13 wherein the one or more sensors comprise pressure sensors that detect back-resistance forces of the applied material for determining whether the material being applied has the correct proportion of material to water prior to use thereof, wherein detected back-resistance forces lower than a predetermined ideal back-resistance force indicate that the mixture of the material includes too much water, and wherein detected back-resistance forces higher than the predetermined ideal back-resistance force indicate that the mixture of the material needs more water. ### Claim 17 (depends on 1) The method of claim 1 wherein the one or more sensors comprise at least one force meter that measures trowel application parameters comprising application time, trowel acceleration, trowel angle, and trowel directional movement, whereby these measured parameters are used to determine whether the material being applied is formulated correctly. ### Claim 18 (depends on 17) The method of claim 17 wherein the at least one force meter comprises one or more component parts that reside on and within the handle of the trowel. ### Claim 19 (depends on 17) The method of claim 17 wherein an accelerometer measures the trowel acceleration, a gyroscope measures the trowel angle, and a magnetometer measures the trowel directional movement. ### Claim 20 A method for applying a material over a surface area comprising: providing an electronic trowel having a handle, at least one blade, and one or more sensors of the trowel; applying the material to the surface area using the electronic trowel whereby the one or more sensors detect and collect installation data of the application process; transmitting the installation data to one or more electronic devices; and analyzing the collected installation data via the one or more electronic devices to identify and correct for any errors in the application of the material over the surface area to ensure a desired end product is achieved.