43results about How to "Uniform reaction force" patented technology

A ball valve having reduced torque requirements for rotation is presented. Torque reduction is realized by providing a shaped sealing back member to provide a back force behind essentially the entire sealing surface of the downstream seal. Torque reduction is also realized by providing a dynamic sealing configuration that varies the sealing force over the valve's operating pressure conditions. An initial bias sealing force is applied by a spring member which also provides a low uniform as-assembled valve torque. As fluid pressure increases, the sealing pressure also increases as an o-ring is forced along a ramped surface of the seal. As inlet pressure decreases, the o-ring is allowed to back down the ramped surface to reduce the sealing force against the valve member. This sealing configuration allows for reverse flow or improper installation of the ball valve, and bottoms out to maintain a sealing force at higher back pressure conditions.

The invention discloses a hydraulic precision leveling machine which comprises an upper roller group, a lower roller group, a load bearing beam, a machine base and four upright posts, wherein the upper roller group and the lower roller group are respectively and fixedly provided with power decelerating devices, the load bearing beam is composed of an upper beam and a lower beam which is fixedly arranged on the machine base, the upper roller group is fixedly connected with the upper beam, the lower roller group is fixedly connected with the lower beam, the four upright posts are respectively and fixedly sheathed on four corners of the lower beam, and the upper beam can be movably sheathed on the four upright posts. Both the upper roller group and the lower roller group comprise a plurality of leveling rollers, wall plates, a plurality of support brackets, a plurality of fixing shafts and a plurality of support jockey pulleys, wherein the leveling rollers are arranged side by side and can be rotatablely supported on the wall plates on both sides, the fixing shafts are supported on the support brackets, and the support jockey pulleys can be rotatablely sheathed on the corresponding fixing shaft. The hydraulic precision leveling machine has the advantages of high leveling precision, simple structure and low manufacturing cost, and leveling requirements for plates with different thicknesses can be satisfied.

The invention relates to a damping device (10), in particular for a linearly movably arranged element (2, 102), having a storage space (25) for receiving a damping medium (26), wherein the damping medium (26) is designed, at least indirectly, with the Element (2, 102) cooperate to reduce its displacement energy at a displacement of the damping medium (26).

The invention relates to the technical field of jack related equipment, and discloses vertical jack top extension supporting equipment and a supporting method. The vertical jack top extension supporting equipment comprises a barrel, the outer side wall of the cross section of the barrel is square, the cross section of the inner side wall of the barrel is circular, the barrel is free of a base, thetop of the barrel is fixedly connected with a circular supporting disc through a locking screw, a round soft rubber block is bonded to the top of the inner side of the barrel, arc-shaped containing grooves are formed in the inner walls of the left side and the right side of the barrel, two movable through holes are formed in each of the left side face and the right side face of the barrel, movable reinforcing rings are welded to the movable through holes in the left side face and the right side face of the barrel, polish rods penetrate through the inner sides of the four reinforcing rings, and the four polish rods correspondingly penetrate through the inner sides of the corresponding movable through holes and extend to the inner sides of the corresponding arc-shaped containing grooves. According to the vertical jack top extension supporting equipment, it is guaranteed that the top of a jack is evenly clamped and stressed, and therefore the top of the jack is well fixed.

Provided is a structure for a vehicle body front (1) in which a bumper net (3) formed of a resin is provided on the vehicle body front side of an apron side member (2) having flat parts above and below a front end part, without a bumper member being provided on the vehicle body front side of the apron side member (2). Block parts (6), and ribs (7) extending in the vehicle body vertical direction, are provided on the left and right sides of the bumper net (3). The left and right ends of the bumper net (3) are disposed overlapping the apron side member (2) when viewed from the front. An attachment part (8) of the bumper net (3) for attachment to the apron side member (2) overlaps with the flat parts (5) of the apron side member (2) when viewed from the front. The ribs (7) are disposed overlapping the flat parts (5) of the apron side member (2) when viewed from the front, and the block parts (6) and the ribs (7) are connected to each other. The attachment part (8) can be deformed by a load from the vehicle body front side.

The invention relates to the technical field of jack-related equipment, and discloses an upright type jack top extension supporting device. The upright type jack top extension supporting device comprises a cylinder body, the cross section of the outer side wall of the cylinder body is square, the cross section of the inner side wall of the cylinder body is round, the cylinder body is not providedwith a base, the top of the cylinder body is fixedly connected with a round supporting disc through locking screws, a round soft rubber block is adhered to the top of the inner side of the cylinder body, arc-shaped placement grooves are formed in the inner walls of the left side and the right side of the cylinder body, two movable through holes are formed in each of the left side face and the right side face of the cylinder body, movable reinforcing rings are welded at the movable through holes in the left side face and the right side face of the cylinder body, polished rods are arranged on the inner sides of the four reinforcing rings in a penetrating and inserting mode, and the four polished rods penetrate through the inner sides of the corresponding movable through holes correspondinglyand extend to the inner sides of the corresponding arc-shaped placement grooves. According to the upright type jack top extension supporting device, the uniformity of clamping stress on the top of ajack is guaranteed, so that the top of the jack is well fixed.