| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 112220000 | Driving mechanisms | 9 |
| 20100229771 | APPARATUS FOR FORWARD AND BACKWARD MOVEMENT OF SEWING MACHINE - Forward and backward movement apparatus for main body of sewing machine according to this invention comprises, in sewing machine comprising Main Body movable forward and backward and supported on both sides of a Base and Heads movable left and right and supported on the Main Body; Frame mounted on the Base; Timing Gears installed in the front and rear Fixed Frame of the Frame in multiple rows; Connecting Shat which connects Timing Gears beneath Front Fixed Frame; Forward and Backward Movement Frames is movable forward and backward on the Frame and connected to the Main Body; Rollers are installed in the Forward and Backward Movement Frames in multiple rows to correspond to the Timing Gears; Timing Belt which zigzags through Timing Gear and Roller and Timing Gear and Roller, and both ends of which are connected to the top of Front and Rear Fixed Frames; and electric motor which drives the Connecting Shat in forward and reverse directions. | 09-16-2010 |
| 20120216733 | TRAVEL BEGINNING/END ADJUSTING POSITIONING STRUCTURE FOR A SEWING MACHINE MOTOR DRIVE MECHANISM - A travel beginning/end adjusting positioning structure for a sewing machine motor drive mechanism comprises a fixed holder, a positioning holder and an adjusting apparatus. By adjusting the relative position of the center of the rotating element of the motor and the control shaft using the adjusting apparatus, the control element on one end of the control shaft will rotate synchronously, and a mechanism connected to the other end of the control shaft will also rotate to a beginning and an end points of a different travel. By such arrangements, when the control element is driven by the motor, the mechanism connected to the control shaft will operate according to different travels, thus achieving the objective of adjusting travel. | 08-30-2012 |
| 20150354116 | Sewing Machine - A sewing machine includes an upper shaft rotatable so as to drive a needle bar, a lower shaft rotatable so as to drive a hook, an upper-shaft pulley attached to the upper shaft, a lower-shaft pulley attached to the lower shaft, a belt linking the upper-shaft pulley and the lower-shaft pulley, and synchronizing a rotation of the upper-shaft pulley and a rotation of the lower-shaft pulley with each other, a belt adjusting mechanism contacting the belt and changing a belt length at a tensioned side at which the belt is drawn, and a tensioner tensioning the belt in accordance with the change in the belt length of the belt at the tensioned side. | 12-10-2015 |
| 112221000 | Needle | 6 |
| 20080216722 | Sewing machine - A sewing machine includes a rotating hook, a lower shaft rotating the rotating hook in synchronization with vertical movement of the needlebar, a lower shaft gear including a helical gear and slidably mounted on the lower shaft, a hook gear including a helical gear capable of mesh engagement with the lower shaft gear and mounted on the rotating hook, a drive force transmission mechanism supporting the lower shaft so that the lower shaft is axially moveable and transmits rotation of the lower shaft to the lower shaft gear, a cam mechanism axially moving the lower shaft gear to adjust at least one of a left encounter timing for seizure of the needle thread loop by the hook beak when the needle occupies a left needle location and a right encounter timing for seizure of the needle thread loop by the hook beak when the needle occupies a right needle location. | 09-11-2008 |
| 20090101053 | Sewing machine and computer readable medium storing a sewing machine control program - A sewing machine including a main shaft; a motor driving the main shaft; a needle bar; a sewing needle attached to a lower end of the needle bar; a needle-bar drive mechanism driven by the main shaft and vertically moving the needle bar; a speed setter setting a rotational speed of the main shaft; a needle-position detector detecting a vertical position of the sewing needle or the needle bar; a main shaft speed detector; a motor controller; and a needle plate; wherein the motor controller executes at least either of a first control decelerating the main shaft below the set rotational speed when the lower end of the sewing needle is above the needle plate, or a second control accelerating the main shaft above the set speed when the lower end of the sewing needle is positioned below the needle plate based on detected results provided by the detectors. | 04-23-2009 |
| 20090277365 | Sewing Machine - An object of the present invention is to provide a sewing machine that naturally enables performing normal sewing work, and that enables skipping a stitch during the sewing work, and furthermore, another object is to provide a sewing machine that enables causing a latching portion and an engaging device of the needle bar to be accurately engaged and disengaged when skipping the stitch during the sewing work. | 11-12-2009 |
| 20100031860 | Sewing machine - A sewing machine including a needle bar; a sewing needle attached to the lower end of the needle bar; a needle bar drive mechanism vertically driving the needle bar; a presser foot capable of applying releasable pressure on a workpiece cloth and that releases the pressure to allow manual movement and sewing of the workpiece cloth; a regulatory needle including a tip and being capable of assuming a pierced state where the tip is pierced through the workpiece cloth and a non-pierced state, wherein the regulatory needle is moved along with the workpiece cloth while retaining the pierced state of the tip; a regulatory needle drive unit vertically driving the regulatory needle between the pierced state and the non-pierced state in coordination with vertical movement of the sewing needle; and a regulatory needle regulator limiting horizontal movement of the regulatory needle so as not to exceed a predetermined stitch pitch. | 02-11-2010 |
| 20120006241 | SEWING MACHINE - A low cost and easy-to-use sewing machine is provided which is capable of performing free motion sewing. The sewing machine includes a needle bar to which a needle can be mounted, a needle bar vertical moving mechanism, a needle bar swing mechanism causing the needle bar to swing in a lateral direction relative to a longitudinal direction along which a feed dog operates for straight stitch, and a control portion for adjusting a swing amount of the needle bar which is brought into swing movement in the lateral direction by the needle bar swing mechanism. | 01-12-2012 |
| 20140345508 | NEEDLE BAR DRIVING SYSTEM FOR SEWING MACHINES - Improved needle bar driving system for sewing machines, that comprises an armshaft rotating with a predetermined speed; a needle bar driving assembly driven by the armshaft and has a needle bar that performs a reciprocating guided linear movement along a substantially vertical axis; a counterweight driving assembly is driven by the armshaft; and a counterweight piston driven by the counterweight driving assembly, and the counterweight piston also performs a reciprocating linear guided movement along an axis parallel to the axis, wherein the movements of the counterweight driving assembly and of the counterweight piston are always opposite to the movement of the needle bar driving assembly and of the needle bar, wherein the combined torque of the counterweight piston and the counterweight driving assembly acting on the armshaft is substantially equal to the combined torque of the needle bar and needle bar driving assembly acting also on the armshaft, but the two torques have opposite direction, whereby the armshaft gets substantially balanced. | 11-27-2014 |
