The present invention discloses a chair tray and chassis, chassis forming method and chassis mounting structure of the same. The main points of its technical solution are that the chair chassis comprises a chassis body that is arranged with a mounting hole thereon for mounting a regulating knob. The edge at the position corresponding to the mounting hole of the chassis body is arranged with a flange. The structural strength and the fatigue strength of the chassis can be enhanced effectively by arranging the flange at the position corresponding to the mounting hole of the chassis, which avoids the occurrence of fracture at the perimeter of the mounting hole of the chassis during use or test and thus enables the thickness of the chassis to be reduced below 3 mm, reducing production material to a very large extent and saving production cost while also ensuring that it can pass the back pad fatigue test in the BIFMA standard. Additionally, the fact that the flange surrounds the mounting hole can increase the structural strength and the fatigue strength at the perimeter of the mounting hole of the chassis more all around with a better effect.

A swivel jig tool for forming a burring hole in a door inner panel includes: a jig base; a jig slide moving forward or rearward along an upper surface of the jig base; and a jig driver disposed behind the jig slide and moving downward by its own weight and applying a force to the jig slide to move the jig slide forward. The jig base comprises: an L-shaped fixed jig base movably supporting the jig slide that is in contact with an upper surface of the L-shaped fixed jig base; a connector protruding upward from the L-shaped fixed jig base at a position opposite to a vertical part of the L-shaped fixed jig base, the connector fixing a hinge shaft thereon; and a rotating jig base mounted to the connector by the hinge shaft to rotate around the hinge shaft that is disposed in a horizontal direction.

A crawler track shoe core metal is plate shaped and is clamped and fixed by a fixing member to a moving link provided at a travelling body. The crawler track shoe core metal includes a cutout portion, a through-hole, and a raised portion. The cutout portion is formed indented in a face at the moving link side. The through-hole pierces through inside the cutout portion in a plate thickness direction and is inserted with the fixing member. The raised portion projects out from a through-hole peripheral edge of the cutout portion toward the moving link side, and has a projecting end with a height that does not reach the face at the moving link side.

A crawler track shoe core metal is plate shaped and is clamped and fixed by a fixing member to a moving link provided at a travelling body. The crawler track shoe core metal includes a cutout portion, a through-hole, and a raised portion. The cutout portion is formed indented in a face at the moving link side. The through-hole pierces through inside the cutout portion in a plate thickness direction and is inserted with the fixing member. The raised portion projects out from a through-hole peripheral edge of the cutout portion toward the moving link side, and has a projecting end with a height that does not reach the face at the moving link side.

A hub for a sheath, catheter, or other tubular device includes a first hub portion including a first hub lumen sized for receiving a medical device therethrough, and a second hub portion including a second hub lumen, the second hub portion coupled to the first hub portion such that the first and second hub lumens are aligned with one another and the first and second hub portions are spaced apart from one another to define a gap. A valve is secured within the gap between the first and second hub portions that includes a valve passage therethrough, e.g., for accommodating receiving a medical device through the first and second hub lumens into the tubular device, while providing a substantially fluid tight seal.

A hub for a sheath, catheter, or other tubular device includes a first hub portion including a first hub lumen sized for receiving a medical device therethrough, and a second hub portion including a second hub lumen, the second hub portion coupled to the first hub portion such that the first and second hub lumens are aligned with one another and the first and second hub portions are spaced apart from one another to define a gap. A valve is secured within the gap between the first and second hub portions that includes a valve passage therethrough, e.g., for accommodating receiving a medical device through the first and second hub lumens into the tubular device, while providing a substantially fluid tight seal.

A tool slide, in particular a wedge drive, including at least one slide bed and one slide part. The slide part is arranged on the slide bed in sliding fashion and in order to absorb transverse forces, a groove and a stud protrudcvfording into the groove are provided, which restrict a transverse motion of the slide part in the slide bed. Between the stud and the groove, at least one sliding element is provided. A driver that can be removed from the slide part is provided and between the slide part and the driver in the contacting state, there is a prism guide composed of inclined elements of the slide body and corresponding inclined surfaces of the driver. Between the slide bed and the slide body, a flat guide is embodied so that the sliding elements of the slide bed and corresponding sliding elements of the slide body are perpendicular to an x axis, thus enabling a movement transverse to the x axis.

A tool slide, in particular a wedge drive, including at least one slide bed and one slide part. The slide part is arranged on the slide bed in sliding fashion and in order to absorb transverse forces, a groove and a stud protrudcvfording into the groove are provided, which restrict a transverse motion of the slide part in the slide bed. Between the stud and the groove, at least one sliding element is provided. A driver that can be removed from the slide part is provided and between the slide part and the driver in the contacting state, there is a prism guide composed of inclined elements of the slide body and corresponding inclined surfaces of the driver. Between the slide bed and the slide body, a flat guide is embodied so that the sliding elements of the slide bed and corresponding sliding elements of the slide body are perpendicular to an x axis, thus enabling a movement transverse to the x axis.

A tool slide, in particular a wedge drive, including at least one slide bed and one slide body. The slide body is arranged on the slide bed in sliding fashion with a prism guide, and a groove and a stud protruding into the groove are provided. Between the stud and the groove, at least one sliding element is provided. A driver that can be removed from the slide body is provided and between the slide body and the driver in the contacting state, there is likewise a prism guide composed of inclined elements of the slide body and corresponding inclined surfaces of the driver. Between the slide bed and the slide body, a prism guide or flat guide is embodied so that the sliding elements of the slide bed and corresponding sliding elements of the slide body are inclined relative to an x axis in a prism guide or are perpendicular in a flat guide. The sliding element has a wedge-like, inclined surface oriented toward the groove with which it rests on a corresponding surface of the groove wall and the corresponding groove wall has a corresponding wedge-like inclined surface so that an axial movement of the sliding element in a longitudinal direction reduces or enlarges a gap between the stud and the sliding element.

A tool slide, having at least one slide bed and one slide body. The slide body is axially movable in a restricted guiding fashion on the slide bed. A groove is provided in the slide body or in the slide bed and as a corresponding means, a guide body of the slide body or slide bed is supported in an axially movable, guiding fashion in the groove. The guide body is embodied as rail-like or slat-like and is positioned with part of its width inserted in a secured fashion into a groove in the slide body or slide bed.