摘要:
An actuator system comprising a shared link (121) arranged to pivot about a first axis (131) relative to a reference structure, a controlled element (125) arranged to pivot about a second axis (126) relative to the reference structure, a first member (146, 152) arranged to pivot about a third axis (134) relative to the shard link and a fourth axis (136) relative to the controlled member, a first actuator arranged to control a first variable distance (LI) between the third axis and fourth axis, a second member (147, 153) arranged to pivot about a fifth axis (133) relative to the shared link and a sixth axis (135) relative to the controlled element, a second actuator (141) arranged to control a second variable distance between the fifth axis and the sixth axis, the system configured such that a change in the first variable distance causes rotation of the controlled element about the second axis when the second variable distance is constant and vice versa.
摘要:
A valve (210) comprising a motor (221) having an output shaft (231) orientated about a motor axis (230), a hydraulic valve having a drive spool (224) configured to move from a first position to a second position, a mechanical linkage (222) between the output shaft (231) and the drive spool (224) having a sleeve (232) mechanically coupled to the output shaft (231), a pole shaft (233) configured for sliding engagement in a direction generally perpendicular to the motor axis, a link (235) connected to the pole shaft (233) by a pivot joint (234), a drive shaft (252) coupled to the link (235) and rotatable about a drive axis, the drive shaft (252) having an end portion to engage and apply a force to the spool (224), and a spring (223) to provide a bias between the pole shaft (233) and the sleeve (232), such that a distance between the motor axis and the pivot joint multiplied by a distance between the drive axis and the applied force is less than a distance between the drive axis and the pivot joint.
摘要:
An exhaust flue support includes an elongate flue strut having a non-flat channel portion integral with a flat portion; and a mounting strap, these parts formed from a common piece of sheet metal and joined together by plural frangible tabs whereby the strap is easily broken away from the strut. The strap has fastening elements for joining the opposing ends. The flat portion of the strut provides a bendable tab capable of joining the strut to the strap when the strap encircles an exhaust flue.
摘要:
An actuator system comprising a shared link (121) arranged to pivot about a first axis (131) relative to a reference structure, a controlled element (125) arranged to pivot about a second axis (126) relative to the reference structure, a first member (146, 152) arranged to pivot about a third axis (134) relative to the shard link and a fourth axis (136) relative to the controlled member, a first actuator arranged to control a first variable distance (LI) between the third axis and fourth axis, a second member (147, 153) arranged to pivot about a fifth axis (133) relative to the shared link and a sixth axis (135) relative to the controlled element, a second actuator (141) arranged to control a second variable distance between the fifth axis and the sixth axis, the system configured such that a change in the first variable distance causes rotation of the controlled element about the second axis when the second variable distance is constant and vice versa.
摘要:
An exhaust flue support apparatus made up of an elongate flue mounting plate defining a first flue access hole with at least one contiguous strapping-tab extending into the flue access hole, the mounting plate incorporating at least two longitudinal, spaced-apart, strengthening beads; a securing strap having a length capable of inscribing the first flue access hole; a centering plate providing an elongated flue access hole; and a butting plate having a V-shaped edge, the securing strap, centering plate and butting plate formed from a single sheet of metal with tabs for easily breaking the securing strap, centering plate and butting plate away from the mounting plate.
摘要:
An actuator system having a controlled element configured for rotary movement about a first axis relative to a reference structure; a linkage system between the element and reference structure; a first actuator and a second actuator configured to power a first degree of freedom and an independent second degree of freedom of the linkage system, respectively; the linkage system having a first link configured for rotary movement about a second axis not coincident to the first axis and second link configured for rotary movement about a third axis; the linkage system configured such that a first angle of rotation may be driven independently of a second angle of rotation between said first link and said reference structure; wherein one of the first or second actuators is configured and arranged to drive rotation of the element about the first axis when the other is operatively locked.
摘要:
An actuator system having a controlled element configured for rotary movement about a first axis relative to a reference structure; a linkage system between the element and reference structure; a first actuator and a second actuator configured to power a first degree of freedom and an independent second degree of freedom of the linkage system, respectively; the linkage system having a first link configured for rotary movement about a second axis not coincident to the first axis and second link configured for rotary movement about a third axis; the linkage system configured such that a first angle of rotation may be driven independently of a second angle of rotation between said first link and said reference structure; wherein one of the first or second actuators is configured and arranged to drive rotation of the element about the first axis when the other is operatively locked.
摘要:
An exhaust flue support apparatus has an elongate flue mounting plate incorporating at least one longitudinal strengthening bead. The mounting plate engages, by break-off tabs, a securing strap, a flange plate, and a centering plate. The mounting plate, securing strap, flange plate and centering plate are made from a single piece of sheet metal.
摘要:
A valve (210) comprising a motor (221) having an output shaft (231) orientated about a motor axis (230), a hydraulic valve having a drive spool (224) configured to move from a first position to a second position, a mechanical linkage (222) between the output shaft (231) and the drive spool (224) having a sleeve (232) mechanically coupled to the output shaft (231), a pole shaft (233) configured for sliding engagement in a direction generally perpendicular to the motor axis, a link (235) connected to the pole shaft (233) by a pivot joint (234), a drive shaft (252) coupled to the link (235) and rotatable about a drive axis, the drive shaft (252) having an end portion to engage and apply a force to the spool (224), and a spring (223) to provide a bias between the pole shaft (233) and the sleeve (232), such that a distance between the motor axis and the pivot joint multiplied by a distance between the drive axis and the applied force is less than a distance between the drive axis and the pivot joint.
摘要:
A plurality of brackets formed as straps from a single piece of sheet material are useful for supporting pipes, vents, flues and similar articles. The straps are mutually joined in side-by-side positions by frangible tabs so that they are easily broken apart, one from the other, by manual bending of the frangible tabs. Each of the straps provides, at each one of its opposing ends, in spaced apart sequence, starting at the terminal ends and moving medially along the straps, features formed in the sheet material, including: a mounting hole for receiving a fastener, a slot for receiving a tab, a fastener access hole, and a tab.