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US 2025/0100174 A1Published application
Lubrication monitoring system
AssigneeHusqvarna AB
InventorsJacob KRANTZ, Joakim SAMEFORS
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AssigneeHusqvarna AB
InventorsJacob KRANTZ, Joakim SAMEFORS
Estimating the term…
The present disclosure relates to a lubrication monitoring system (15) configured to monitor a supply of lubricant in a hand-held cutting tool (1) having a cutting unit (3, 5). A lubricant tank (41) and a conduit (45) are configured to duct a flow of lubricant from the tank (41) to the cutting unit (3, 5). The lubrication monitoring system (15) comprises a heating element (29) and a sensor arrangement (31, 33), the heating element (29) being configured to heat the lubricant flow. The sensor arrangement comprises a first sensor (31) located at the flow, upstream of the heating element (29), and a second sensor (33) located at said flow, downstream of the heating element. The lubrication monitoring system outputs a monitoring signal based on a sensed temperature difference between the first and second sensors (31, 33).
A lubrication monitoring arrangement configured to monitor a supply of lubricant in a hand-held cutting tool having a cutting unit, a lubricant tank and a conduit configured to duct a flow of lubricant from the tank to the cutting unit, wherein the lubrication monitoring arrangement comprises a heating element and a sensor arrangement, the heating element being configured to heat said flow, wherein the sensor arrangement comprises a first sensor located at said flow, upstream of the heating element, and a second sensor located at said flow, downstream of the heating element, and wherein the lubrication monitoring arrangement outputs a monitoring signal based on a sensed temperature difference between the first and the second sensor.
A lubrication monitoring system configured to monitor a supply of lubricant in a hand-held cutting tool having a cutting unit, a lubricant tank and a conduit configured to duct a flow of lubricant from the tank to the cutting unit, wherein the lubrication monitoring system comprises a sensor arrangement, and outputs a lubrication monitoring signal to a control unit depending on the lubricant flow, wherein the monitoring system is configured to output a lubrication monitoring signal in the form of a periodically varying voltage upon detection of a lubricant flow exceeding a predetermined threshold.
A hand-held cutting tool having a cutting unit, a lubricant tank and a conduit configured to duct a flow of lubricant from the lubricant tank to the cutting unit, the hand held cutting tool further comprising a lubrication monitoring unit configured to monitor the lubricant flow, wherein the lubricant tank comprises an outer recess, and wherein the lubrication monitoring unit is located in said recess.
Dependencies are inferred from the claim text.