The present disclosure relates to a coupling arrangement (100) for connection between a first rotatable shaft (102) and a second rotatable shaft (104), the coupling arrangement comprising a first rotatable portion (106) connectable to the first rotatable shaft (102); a first reciprocating element (110) mechanically connected to the first rotatable portion (106) at a first interconnecting portion (112) for transforming a rotating motion from the first rotatable portion (106) to a linear motion of the first reciprocating element (110); a second rotatable portion (108) connectable to the second rotatable shaft (104); a second reciprocating element (114) mechanically connected to the second rotatable portion (108) at a second interconnecting portion (116) for transforming a linear motion from the second reciprocating element (114) to a rotating motion of the second rotatable portion (108); and a connecting element (118, 118′) rotatably connected to each of the first reciprocating element (110) and the second reciprocating element (114) for allowing a relative rotation between the connecting element (118, 118′) and the first (110) and second (114) reciprocating elements, respectively.

The present disclosure relates to a coupling arrangement (100) for connection between a first rotatable shaft (102) and a second rotatable shaft (104), the coupling arrangement comprising a first rotatable portion (106) connectable to the first rotatable shaft (102); a first reciprocating element (110) mechanically connected to the first rotatable portion (106) at a first interconnecting portion (112) for transforming a rotating motion from the first rotatable portion (106) to a linear motion of the first reciprocating element (110); a second rotatable portion (108) connectable to the second rotatable shaft (104); a second reciprocating element (114) mechanically connected to the second rotatable portion (108) at a second interconnecting portion (116) for transforming a linear motion from the second reciprocating element (114) to a rotating motion of the second rotatable portion (108); and a connecting element (118, 118′) rotatably connected to each of the first reciprocating element (110) and the second reciprocating element (114) for allowing a relative rotation between the connecting element (118, 118′) and the first (110) and second (114) reciprocating elements, respectively.

A rotary device includes a rotatable member and a limiting member. The rotatable member includes a positioning mechanism, the positioning mechanism includes a stopping member and a positioning member. When the rotatable member rotates along a first rotation direction to make the limiting member abut against the positioning member, the positioning member is pushed by the limiting member to move away from the stopping portion and rotate relative to the stopping member, so that the positioning member to passes through the limiting member. When the rotatable member rotates along a second rotation direction opposite to the first rotation direction to make the limiting member abut against the positioning member, the positioning member is pushed by the limiting member to move close to the stopping portion, so that the positioning member is stopped between the limiting member and the stopping portion, to position the rotatable member.

A rotary device includes a rotatable member and a limiting member. The rotatable member includes a positioning mechanism, the positioning mechanism includes a stopping member and a positioning member. When the rotatable member rotates along a first rotation direction to make the limiting member abut against the positioning member, the positioning member is pushed by the limiting member to move away from the stopping portion and rotate relative to the stopping member, so that the positioning member to passes through the limiting member. When the rotatable member rotates along a second rotation direction opposite to the first rotation direction to make the limiting member abut against the positioning member, the positioning member is pushed by the limiting member to move close to the stopping portion, so that the positioning member is stopped between the limiting member and the stopping portion, to position the rotatable member.

There is disclosed a torque transfer apparatus for a mineral drilling tool used in a downhole assembly of a drill string. The drilling tool has a downhole drill bit and one or more uphole drill bits spaced apart from the downhole drill bit, with the torque transfer apparatus being located between them. The apparatus has an axial bore therethrough for fluid flow and comprises first and second members being rotatably joined to each other. The apparatus rotationally couples and transfers torque between the first and second members when a torque difference between torque on the downhole drill bit and torque on the uphole drill bit is below a threshold torque value. The apparatus disengages the rotational coupling while the torque difference exceeds the threshold torque value. The flow rate of drilling fluid flowing through the axial bore is altered when the apparatus engages and disengages the coupling.

There is disclosed a torque transfer apparatus for a mineral drilling tool used in a downhole assembly of a drill string. The drilling tool has a downhole drill bit and one or more uphole drill bits spaced apart from the downhole drill bit, with the torque transfer apparatus being located between them. The apparatus has an axial bore therethrough for fluid flow and comprises first and second members being rotatably joined to each other. The apparatus rotationally couples and transfers torque between the first and second members when a torque difference between torque on the downhole drill bit and torque on the uphole drill bit is below a threshold torque value. The apparatus disengages the rotational coupling while the torque difference exceeds the threshold torque value. The flow rate of drilling fluid flowing through the axial bore is altered when the apparatus engages and disengages the coupling.

A system for adjusting the rotational timing between driveshafts rotated by an output shaft. The system includes a flange coupler configured to be coupled to a first of the driveshafts to prevent rotation therebetween. The flange coupler defines openings therein. A coupler input gear defines openings therein and is configured to rotatably mesh with a second input gear coupled to a second of the driveshafts. Fasteners are configured to the extend through the openings in the flange coupler and the openings in the coupler input gear to rotationally fix the flange coupler and the coupler input gear, which are fixable at multiple rotational orientations therebetween. The rotational timing between the driveshafts is adjustable by rotating the coupler input gear into different orientations of the multiple rotational orientations relative to the flange coupler prior to fixing the flange coupler to the coupler input gear.

A system for adjusting the rotational timing between driveshafts rotated by an output shaft. The system includes a flange coupler configured to be coupled to a first of the driveshafts to prevent rotation therebetween. The flange coupler defines openings therein. A coupler input gear defines openings therein and is configured to rotatably mesh with a second input gear coupled to a second of the driveshafts. Fasteners are configured to the extend through the openings in the flange coupler and the openings in the coupler input gear to rotationally fix the flange coupler and the coupler input gear, which are fixable at multiple rotational orientations therebetween. The rotational timing between the driveshafts is adjustable by rotating the coupler input gear into different orientations of the multiple rotational orientations relative to the flange coupler prior to fixing the flange coupler to the coupler input gear.

A non-backdrivable clutched module for a bi-directional actuator such as actuators used for active aerodynamics on vehicles. The module has both a stopper mode and a clutch mode. During the stopper mode a back-driving force gets diverted away from the actuator using a locking bearing member. If the force is too great a clutch mode will disengage the back-driving force completely from the shaft connected to the actuator, thereby preventing damage to the actuator.

Coupling for a razor, comprising a first component, a second component rotatable relative thereto about a rotational axis extending therebetween, and a rotation limit, a male part thereof extending along the rotational axis into a female part thereof. The male and female parts are shaped to define one or more rotational stops to the rotation of one of the first and second components about the rotational axis relative to the other. A resilient protrusion of the second component, receivable in a recess of the first component, bends elastically in response to a force applied during shaving that rotates the one component about the rotational axis relative to the other component, and biases them towards a neutral position once the force is stopped. Fabrication of the coupling. Razor and handle comprising the coupling.