Class / Patent application number | Description | Number of patent applications / Date published |
112228000 | Revolving hooks | 13 |
20110146550 | CONSTRUCTION OF VERTICAL FULL ROTARY HOOK FOR SEWING MACHINE - An inner rotary hook has a needle drop hole, and side wall portions formed over the drop hole and defining a space for passage therethrough of a sewing needle. The side wall portions are located adjacent to opposite sides of the needle passing through the space and extend from a region in front of the needle to a region behind the needle. The side wall portions can abut against an upper thread, passed through a hole of the needle, near a bottom dead point of the needle. If any of two portions of the thread located forward and rearward of the needle has strayed laterally, it can abut against one of the wall portions. Consequently, it is possible to prevent the front-side upper thread portion from circling around behind the needle, but also prevent the rear-side upper thread portion from straying laterally to form a laterally-protruding loop. | 06-23-2011 |
112229000 | Bobbin tensioning | 3 |
20100126398 | BOBBIN THREAD FEEDER OF SEWING MACHINE - The present invention provides a bobbin thread feeder of sewing machine of simple structure in which a lower thread can be reliably fed at an appropriate tension. A lower thread bobbin | 05-27-2010 |
20120097084 | SEWING-MACHINE BOBBIN THREAD TENSION CONTROLLER, AND SEWING MACHINE - There is provided a sewing-machine bobbin thread tension controller capable of elaborately, accurately controlling bobbin thread tension without depending on frictional force. | 04-26-2012 |
20160040341 | HOOK FOR LOCKSTITCH SEWING MACHINE COMPRISING AT LEAST ONE TENSION SPRING TO CREATE A STABLE TENSION OF THE BOBBIN THREAD | 02-11-2016 |
112231000 | Bobbin holders and casings | 9 |
20100107948 | Bobbin holding member and storage case - A bobbin holding member holds a bobbin, and the bobbin holding member includes a body portion that holds detachably an outer periphery of a brim portion provided to both ends of a middle body section of the bobbin, wherein the body portion includes a fitting portion and a fitting target portion to be fitted to the fitting portion of any of the other bobbin holding members. | 05-06-2010 |
20100126399 | ROTARY HOOK FOR A LOCKSMITH SEWING MACHINE, COMPRISING MEANS TO REDUCE THE NOISE THEREOF - A rotary hook of a lockstitch sewing machine includes at least one hook body including a cylindrical cavity and a basket freely rotatable in the cylindrical cavity, to which it is constrained by a rib, provided on the outer surface of the basket, which engages in a C-shaped race, provided in the inner wall of the cylindrical cavity of the hook body and delimited by two plane surfaces parallel to each other and by a cylindrical surface perpendicular to the plane ones, suitable to prevent axial and radial translation of the basket in the cylindrical cavity—further includes elements applying to the basket an axial pressure causing the rib of the basket to lean against one of the plane surfaces delimiting the race present in the cylindrical cavity of the hook body. Some of these elements are carried by the lockstitch sewing machine to which the rotary hook belongs. | 05-27-2010 |
20100206207 | LOCKING DEVICE FOR A BOBBIN CASE FOR A BOTTOM THREAD BOBBIN - A locking device having a connection element ( | 08-19-2010 |
20120145059 | LOCKING MECHANISM FOR A BOBBIN CASE - A locking mechanism for a bobbin case ( | 06-14-2012 |
20120222598 | BOBBIN CASE FOR A SEWING MACHINE - A bobbin case is used in a sewing machine for mounting a bobbin, and includes a case body having a base wall, a case shaft extending along a central line from the base wall for rotatably mounting the bobbin, and a rim having entry and exit holes to define a tensioning path therebetween, and a diverting concaivity configured to divert a running route which is disposed downstream of the tensioning path. A lead-out member is disposed downstream of the running route. A leaf spring is positioned on the rim, and is configured to guide an under thread of the bobbin to run along the tensioning path with an urging force, and continued on running along the running route to the lead-out member to be interlocked with an upper thread for a sewing action. | 09-06-2012 |
20140245937 | ROTARY HOOK WITH BOBBIN CASE FOR A LOCKSTITCH SEWING MACHINE INCLUDING MEANS TO REDUCE THE PLAYS BETWEEN BOBBIN CASE AND BASKET AND TO REDUCE THE NOISIE THEREOF - A rotary hook ( | 09-04-2014 |
20150292130 | UNDER-THREAD SUPPLY DEVICE FOR SEWING MACHINE - The present invention relates to an under-thread supply device for a sewing machine, and more particularly, to an enhanced under-thread supply device for a sewing machine, in which the device of the present invention and a unit for mounting said device are just partially changed so as to increase the winding amount of the under-thread of conventional sewing machines in order to achieve improved efficiency of sewing and efficiently reduce the puckering of a work piece without causing changes in the basic structure of conventional sewing machines. | 10-15-2015 |
20150308023 | Horizontal Rotary Hook of Sewing Machine - Provided is a horizontal rotary hook including: an inner rotary hook including an attracted member made of metal in an outer lower surface portion; a permanent magnet that attracts the inner rotary hook; a magnet plate accommodating the permanent magnet and provided with a mounting hole at a center of a diameter thereof; a non-metallic outer rotary hook accommodating the magnet plate and having a shaft hole at a center of a diameter of an inner bottom portion thereof; and a hook supporting shaft that is inserted through the hole of the magnet plate and the shaft hole of the outer rotary hook and includes, at an upper end thereof, a flange for rotatably supporting the outer rotary hook and the magnet plate. A friction coefficient of a contact surface of the magnet plate that comes into contact with the outer rotary hook is set to be larger than a friction coefficient of the flange of the hook supporting shaft. | 10-29-2015 |
20150308024 | Horizontal Rotary Hook of Sewing Machine - Provided is a horizontal rotary hook for a sewing machine including: an inner rotary hook including an attracted member made of metal in an outer lower surface portion; a permanent magnet that attracts the inner rotary hook; a magnet plate that accommodates the permanent magnet and is provided with a shaft hole for mounting at a center of a diameter thereof; a non-metallic outer rotary hook that accommodates the magnet plate and has a shaft hole at a center of a diameter of an inner bottom portion thereof; and a hook supporting shaft that is inserted through the shaft hole of the magnet plate and the shaft hole of the outer rotary hook, and that includes, at an upper end thereof, a flange for rotatably supporting the outer rotary hook and the magnet plate. A rotation stopper for the magnet plate is disposed to be positioned more inward than an outer circumference edge of the permanent magnet placed in the magnet plate. | 10-29-2015 |