Abstract: A surgical stapling system includes an anvil, a blade, a motor and gear assembly, a motor power supply, and a motor controller. A method of controlling the motor includes receiving first and second data indicative of operations of the motor under first and second conditions, respectively, and adjusting a motor control signal based on a difference between the first and second data. Another method includes receiving initial manufacture motor and gear assembly data from a manufacture and operational data during an initial use of the system, and adjusting parameters of the control signal based on a difference between the manufacture data and the operational data. Another method includes controlling a pulse-width modulated (PWM) motor control signal, receiving data regarding an interaction between the blade and a tissue clamped by the anvil, and adjusting a frequency of the PWM signal based on the data related to the interaction.

Abstract: Methods, devices, and systems for controlling a tissue-treatment motion by a surgical instrument are disclosed.

Abstract: A surgical instrument includes an anvil and an elongate channel. The elongate channel includes a plurality of first electrical contacts and a plurality of electrical connectors comprising a plurality of second electrical contacts, wherein the electrical connectors are spring-biased such that a gap is maintained between the first electrical contacts and the second electrical contacts. The surgical instrument further includes a staple cartridge releasably attachable to the elongate channel, wherein the staple cartridge has a cartridge body comprising a plurality of staple cavities, a plurality of staples deployable from the staple cavities into the tissue, and a plurality of third electrical contacts, wherein the attachment of the staple cartridge to the elongate channel moves the electrical connectors causing the second electrical contacts to bridge the gap and become electrically coupled to the first electrical contacts.

Abstract: A method of adjusting velocity in a motorized surgical instrument is provided. The surgical instrument comprises a displacement member configured to translate within the surgical instrument over a plurality of predefined zones, a motor coupled to the displacement member to translate the displacement member, a control circuit coupled to the motor, a position sensor coupled to the control circuit, the position sensor configured to measure the position of the displacement member and a timer circuit coupled to the control circuit, the timer circuit configured to measure elapsed time. The method includes setting a directed velocity of the displacement member; determining an actual velocity of the displacement member; determining an error between the directed velocity of the displacement member and the actual velocity of the displacement member; and controlling the actual velocity of the displacement member based on the magnitude of the error.

Abstract: An improved method for manufacturing concrete blocks and constructing fencing. The method produces a concrete structure which includes two distinct types of complementary irregularly shaped glass particles. The first type of particle has interstices which are filled with vesicles or cavities of varying shape and dimension and which are pierced with a system of canals and capillaries. The canals and capillaries open on the surface of the particle. The second type of particle has spheroid shaped cells or bubbles sealed inside the particle and has small craters or hollows formed on the surface of the particles.