![]() ![]() ![]() ![]() 238000006073 displacement reaction Methods 0.000 description 2.230000000875 corresponding Effects 0.000 claims description 10.230000036316 preload Effects 0.000 claims abstract description 56.Assignors: LEWIS, STEPHEN R., LOVE, WILLIAM, VENKATARAGHAVAN, JAYARAMAN, XU, ZHENLONG Publication of US20100275423A1 publication Critical patent/US20100275423A1/en Application granted granted Critical Publication of US7997145B2 publication Critical patent/US7997145B2/en Status Active legal-status Critical Current Anticipated expiration legal-status Critical Links Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Caterpillar Inc filed Critical Caterpillar Inc Priority to US12/786,575 priority Critical patent/US7997145B2/en Assigned to CATERPILLAR INC reassignment CATERPILLAR INC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Original Assignee Caterpillar Inc Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Lewis Zhenlong Xu Current Assignee (The listed assignees may be inaccurate. ![]() ( en Inventor Jayaraman Venkataraghavan William Love Stephen R. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Granted Application number US12/786,575 Other versions US7997145B2 Google Patents System for preloading piezoelectric actuators and methodĭownload PDF Info Publication number US20100275423A1 US20100275423A1 US12/786,575 US78657510A US2010275423A1 US 20100275423 A1 US20100275423 A1 US 20100275423A1 US 78657510 A US78657510 A US 78657510A US 2010275423 A1 US2010275423 A1 US 2010275423A1 Authority US United States Prior art keywords preload piezoelectric element preloading mechanical force piezoelectric Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US20100275423A1 - System for preloading piezoelectric actuators and method Suitable for sophisticated vacuum applications Piezo actuators do not require lubrication and do not cause abrasion.US20100275423A1 - System for preloading piezoelectric actuators and method 100 billion cycles without a single failure are proven. PICMA® actuators offer an up to ten times longer lifetime than conventional polymerinsulated actuators. This protects them against humidity and failure resulting from an increase in leakage current. Preloaded Piezo Actuators For High Loads and Forces, with Position Sensor P-845 Outstanding lifetime due to PICMA® piezo actuators Travel range to 90 µm Push force capacity to 3000 N Pull force capacity to 700 N µs response time Subnanometer resolution Vacuum versions, optional water-resistant housing Application fields Static and dynamic precision positioning Fiber positioning Laser tuning Nanotechnology Outstanding lifetime thanks to PICMA® piezo actuators The patented PICMA® piezo actuators are all-ceramic insulated. ![]()
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