Class / Patent application number | Description | Number of patent applications / Date published |
081590100 | Ball or roller wedge | 13 |
20080216610 | HAND TOOL WITH BIT RELEASE DEVICE - A hand tool includes a socket which is connected to a head of the hand tool and the socket includes first and second recesses in tow ends thereof and a passage is defined in communication between the first and second recesses. A push rod includes a head and a shank which extends through the first recess, the passage and is inserted in the second recess in which a bit is inserted. A spring is mounted to the shank and biased between the head and an inner end of the first recess. The screw bit can be quickly pushed out from the second recess of the socket by pushing the push rod toward the screw bit. | 09-11-2008 |
20080276762 | Torque transmission mechanism - A torque transmission mechanism comprises an outer body defining a cavity and an inner body located at least partially inside the cavity and able to rotate therein. A plurality of rollers located between the outer and inner bodies interact with cam surfaces so that rotation of the inner body in a first direction is substantially unimpeded but rotation in the opposite direction is prevented or impeded by interaction of rollers with one or more cam surfaces. One of the rollers is larger than at least one other roller and is located in a recess formed in one of the outer and inner bodies. In one embodiment the recess is formed in a part of the outer body which has a greater wall thickness, excluding the effect of the recess than the rest of the outer body, so that the larger roller is accommodated without adding bulk to the outer body. | 11-13-2008 |
20090139377 | RATCHET WITH SUBSTANTIALLY SILENT MOVEMENT-PREVENTION MECHANISM - A ratchet with a handle and a head that includes a substantially silent movement-prevention mechanism. The mechanism includes a first component that defines a path, and a second component that is locatable in the path and moves bidirectionally within it. The path is constructed to include plural regions that prevent movement by the second component to allow the ratchet to drive a desired fastener. The first component is constructed to define a path, or plural paths, with a central region that allows movement of the second component and outer, opposing regions that prevent movement of the second component. The second component is formed as a roller or plural rollers. The central region of the path includes a subregion constructed to position the second component in a beginning location in the central region. The subregion may be formed as a depression in the path. | 06-04-2009 |
20100269640 | Wrench with bolt engaging portion and roller - A wrench with a ratcheting device is provided, and the wrench comprises: a handle having opposing ends; and two bolt engaging members situated on opposing ends of the handle, each of the members comprises at least two stationary jaws forming a space and at least one cavity with an opening situated adjacent one of the stationary jaws, each of the members comprising a ratcheting device with at least one roller, and the roller is designed to be situated within the cavity of the member, at least a portion of the roller is adapted to protrude from the opening, at least one of the jaws has an extended portion with flat, angled tip, and the tip is designed to initiate engagement with a bolt and allow the bolt to enter into the space between the jaws and allow the exposed portion of the roller to contact the bolt and allow for a ratcheting action. | 10-28-2010 |
20110079112 | Screwdriver with Changeable Blade - A screwdriver includes a handle, a bit and a chuck for connecting the bit to the handle. The chuck includes a cylinder, two latches, a spring and a control element. The cylinder is securely connected to the handle. The latches are used to keep the bit connected to the cylinder, a spring for pushing the bit from the cylinder when the latches release the bit and a control element operable for causing the latches to release the bit. | 04-07-2011 |
20110138970 | LOW PROFILE WRENCH AND METHOD - A member may be rotated by engaging the member with a drive element and rotating the drive element in a single direction such that rotation in an opposite direction is prevented. | 06-16-2011 |
20110203420 | AUTO-ADJUSTABLE BEARING WRENCH - A bearing wrench comprising a casing as main support, with at least one piston coupling hole, a synchronizing device, and closing caps, power cylinder, a cylinder thrust spring and a connection screw between the boxes, wherein the synchronizing device with the help of the cylinders exert force on the bolts for the securing thereof and with the advantage of being able to releasing by the same synchronizing device housed in the nut driving wrench which may be hydraulically and manually used. | 08-25-2011 |
20120174715 | WRENCH OF RATCHET WHEEL - A wrench of ratchet wheel, to which a high torque force can be applied and which can be widely used, includes a grip, a ratchet wheel mechanism and a driver which successively connect one to another from above to below. The ratchet wheel mechanism includes stem, tumbler member, a first tooth, a second tooth and a tooth pin, wherein the first tooth and the second tooth are flexibly mounted on the stem, the stem is embedded in the tumbler member, the teeth on tooth pin are arranged around the external margin of tooth pin, and the tooth pin and the stem are nest-connected so as to rotate in relative to each other. The ratchet wheel mechanism further includes the third tooth and the fourth tooth, wherein the third tooth and the fourth tooth are flexibly mounted on the stem, and the first tooth, the second tooth, the third tooth and the fourth tooth are successively disposed in the circumference direction of the tooth pin. The tumbler member is provided with a disengaging device which is used to disengage both the first tooth and the third tooth from the teeth on the tooth pin or to disengage both the second tooth and the fourth tooth from the teeth on the tooth pin. | 07-12-2012 |
20140060257 | Roller clutch reversing mechanism - This application relates generally to a reversible force or torque transfer device. This device may be used in many different applications. The example used for the illustrative purposes of this patent is a wrench. The present invention devises a reverse mechanism that can resist any amount (up to the shear strength of the material) of randomly generated forces that may cause this effect. | 03-06-2014 |
20150107422 | Ratchet Screwdriver - A ratchet screwdriver includes a ratchet wheel; a pawl base assembly, for inserting into the ratchet wheel, and a plurality of pawl pieces for engaging with teeth, the rear end of the pawl base assembly connecting to a handle of a screwdriver while the front end connecting to a head of the screwdriver; a rings assembly adjustably mounted on the ratchet wheel; the pawl base assembly includes a center rod and a pedestal, the rear part of the center rod is provided with a first positioning slot, the center rod passes through the center hole of the pedestal, the center rod is clamped at the first positioning slot by a first clamping member. Compared with the prior art, the overall structure is more rational and practical, and is safer and more reliable in use, and is capable of loosening or tighten a screw quickly. | 04-23-2015 |
20150306745 | Bias and Reversing Mechanism for Roller Clutch Ratchet - A roller clutch mechanism of a reversible ratchet tool is configured to include a biasing and reversing mechanism for biasing rollers in the roller clutch mechanism. A cage member of the roller clutch mechanism locates rollers in either a clockwise or counterclockwise position based on a selective position of the reverser mechanism. The reverser mechanism applies a constant bias to the cage member so that the rollers are constantly biased and quickly engage between the ratchet body and the drive head. The constant bias applied to the cage member reduces the ratcheting angle for improved performance of the reversible ratchet tool. | 10-29-2015 |
20160129562 | COMBINATION WRENCH WITH A REVERSIBLE ROLLER CLUTCH - A force transfer wrench apparatus includes a housing assembly and a handle attached to the housing assembly. The housing assembly includes a housing, a spindle, and wedging element. The spindle is disposed within the housing. The housing includes an annular outer race. The spindle includes an opening at a center of the spindle and at least one protrusion around an outer circumference of the spindle. The protrusion forms a ramp including a ramp surface. The ramp surface slopes from the outer circumference of the spindle to a larger outer circumference of the spindle. The wedging element is disposed between the spindle and the outer race. The wedging element is a cylinder comprising an outer surface. The wedging element is disposed between the spindle and the outer race such that the outer surface of the wedging element contacts the ramp surface. | 05-12-2016 |
20160193721 | REVERSIBLE ROLLER WRENCH WITH A SCALLOPED OUTER RACE | 07-07-2016 |