108results about How to "Keep closed" patented technology

A portable wheel chair lift device includes a lift car, a support base, and a lifting mechanism coupled thereto to selectively raise or lower the lift car while allowing the floor of the lift car to be fully-lowered to the ground surface. A scissors-like brace selectively locks the front door of the lift car to the support base when the lift car is elevated. The lift car floor can be folded and collapsed to a reduced width allowing transport through narrow. Transport casters are removably mounted to the bottom of the lift car to facilitate transport. The lift device includes a height adjustment control within the lift car to repeatably raise the lift car to the height of a stage.

A pretensioning device (10) for a safety belt, of a motor vehicle, having a gas generator (17), a piston (21) guided in a tube (16), which closes a pressure area (20) in the tube (16) that is pressurized by the gas generator (17) whereupon the piston (21) is able to move in a pretensioning movement which is able to be conveyed to the safety belt by means of an inertia body (19a) resting on a front face (9) of the piston (21). The piston (21) forms a pass-through opening (1) releasable upon exceeding of a predetermined pressure and a recess (26) is provided in the front face (9) with an inertia body (19a) resting thereon, so that a flow connection is created from the pass-through opening (1) to the area (25) located behind the piston (21) in the direction of the pretensioning movement (S).

In this slide fastener (1, 80), a fragile section (15, 86) is provided to an element row (12), and it is possible to detach the element row (12) in an engaged state from the fragile section (15, 86) and to separate first and second fastener stringers (10a, 10b). Lateral withdrawal prevention sections (30, 71, 72, 73, 74, 84) are arranged on the second fastener stringer (10b). The lateral withdrawal prevention sections (30, 71, 72, 73, 74, 84) have a larger thickness, for preventing lateral withdrawal, than the spacing of a tape insertion and passage gap of a slider (50). The lateral withdrawal prevention sections (30, 71, 72, 73, 74, 84) have at least one small-width section (32, 71b, 72b, 72d, 73b, 74b) at a portion provided with a thickness for preventing lateral withdrawal. Even when the slide fastener (1, 80) receives a lateral pulling force, the lateral withdrawal prevention sections (30, 71, 72, 73, 74, 84) are thereby held in the slider (50), and a closed state can be maintained. It is also possible, when the element row (12) is detached from the fragile section (15, 86), to pull out the lateral withdrawal prevention sections (30, 71, 72, 73, 74, 84) from the slider (50) in a smooth manner.

The invention discloses a pressure plate clamping mechanism. The pressure plate clamping mechanism comprises a pressure plate and a force application rod penetrating the pressure plate, one end of the pressure plate is supported on a cushion block, the other end of the pressure plate is used for compressing a workpiece, the cushion block comprises a support part and an abdication part, the top surface of the support part is in contact with the pressure plate, the abdication part is provided with an abdication hole for enabling the force application rod to penetrate, and a gap is arranged between the top surface of the abdication part and the pressure plate. The pressure plate clamping mechanism disclosed by the invention can achieve the purpose of expanding the range of applications of ordinary clamping by reducing the spatial size of the cushion block. The force at the fulcrum of the cushion block can be balanced at the lower part of the whole cushion block by ingenious force conversion. Simultaneously, the pressure plate clamping mechanism can ensue that the force at the fulcrum can be close to the workpiece as far as possible and ensure the reasonable equilibrium of a lever. Compared with the ordinary clamping, the stress situation of theoretical calculation is the same. The pressure plate clamping mechanism disclosed by the invention has the characteristics of simple and compact structure, and stability and reliability in operation.

The invention discloses a rolling device for a plastic thin film. The rolling device comprises a rolling cylinder. Clamping plates are arranged at the two ends of the rolling cylinder. Fixing bases are arranged on the outer sides of the clamping plates. A clamping groove is formed in each fixing base. A ball plate is arranged on the outer wall of the end portion, close to the rolling cylinder, ofeach fixing base. A rotating shaft is fixedly arranged on the outer side of each fixing base. A drive mechanism is arranged on the bottom of the rotating shaft on one side of each fixing base. A bearing is arranged on the end portion of each rotating shaft. A supporting table is arranged on the outer side of each bearing. A first air cylinder is fixedly arranged on the top of each supporting table. A second air cylinder is fixedly arranged on the front side of each supporting table. A control box is fixedly arranged on the end portion of each first air cylinder, and a control box is fixedly arranged on the end portion of each second air cylinder. A cold air pipe and an ion stick are arranged on the inner side of each control box. According to the rolling device, a forward and backward motor drives the cold air pipes to rotate, the cold air pipes and the plastic thin film are adjusted to be arranged in an acute angle manner, the large area of the plastic thin film is cooled through wind, adhesion caused after rolling is avoided, in additional, the ion sticks can remove static electricity on the plastic thin film, and the influence on rolling and caused adhesion are avoided.

The invention relates to a transmission device for optical equipment, which comprises a drive unit, a guide part, a frame sleeved on the guide part, a clamping jaw unit, a first elastic part and a second elastic part. The drive unit comprises a screw rod. The clamping jaw unit comprises a main clamping jaw and an assistant clamping jaw and is connected with the frame. The first elastic part is arranged on the frame and constantly keeps the main clamping jaw and the assistant clamping jaw to be close with each other so as to be tightly meshed with the screw rod. The second elastic part is arranged on the clamping jaw unit and constantly keeps the frame to push against the guide part. According to the transmission device, the screw rod is driven to rotate by the drive unit so as to drive the clamping jaw unit to lead the optical device on the frame to traverse the guide part; and the frame constantly pushes against the guide part, so that, the frame does not cause shake to result in deviation in optical imaging when being in movement.

The invention discloses an oil well wellhead water content automatic test device and a test method thereof. By means of the method, the water content of an oil-water mixture can be conveniently and rapidly measured at a wellhead to achieve fine monitoring of yield fluctuation of oil wells of an oil field and rapid monitoring of the water content of the oil wells. The device comprises an oil storage box, a floating ball plug, a water content measuring instrument, a back flowing tube and a one-way valve; the oil storage box is communicated with an oil well oil delivery manifold through a formedliquid inlet, and the oil storage box is located below the oil well oil delivery manifold; the input end of the water content measuring instrument is communicated with the oil storage box, and the output end is connected with the back flowing tube; a power device is arranged in the water content measuring instrument, and the power device is used for delivering the liquid in an oil storage tank tothe oil well oil delivery manifold through the back flowing tube; the floating ball plug is arranged in the oil storage box, and the density of the floating ball plug is smaller than oil; the one-wayvalve is arranged between the back flowing tube and the oil well oil delivery manifold, and the back flowing tube is communicated with the oil well oil delivery manifold in one direction from the backflowing tube to the oil well oil delivery manifold by means of the one-way valve.

The invention discloses a method for post-processing measured data by using scrolling smoothing filtering. The method is independent of hardware and high in reliability, and filtering characteristics are conveniently modified. The technical scheme comprises the following steps of: setting a scrolling smoothing digital software filter for post-processing a fuel quantity signal, wherein a filtering queue address (1), a filtering queue length setting unit (2), a filtering limit (3), an upper filtering limit (4), a lower filtering limit (5), a sampled value (6) and a filtering output value (7) are set in the digital software filter; refusing obviously false data by utilizing Deltalimit; performing reliability analysis on sampled data by utilizing Deltaupper and Deltalower; and performing queue filling, and performing averaging for K times. The scrolling smoothing filter for post-processing the fuel quantity signal is implemented by a software algorithm, and the fuel quantity signal is smoothed by a digital filtering method, so that fuel level fluctuation errors are eliminated, and the shortcomings of fuel quantity measurement errors caused by maneuver flight are overcome.

A power saving control device for a permanent-magnet safe brake relates to the technical field of energy conservation and heat-production reducing of permanent-magnet brakes. The invention aims at solving the problem that the prior permanent-magnet safe brake when working after turned on can consume much power (energy), most of which is transformed into heat, quickly raising the surface temperature of the brake. The output end of a PWM duty ratio adjustment controller connects with one input end of the permanent-magnet safe brake via a first operational-amplifier comparer U1, a two-way and-gate comparer U2, a triode B1 and a field-effect transistor B2; the other input end of the permanent-magnet safe brake connects with the input end of the PWM duty ratio adjustment controller via a voltage amplifier U3 and a second operational-amplifier comparer U4; the PWM duty ratio adjustment controller is provided with an electromotor controlling an enabling input end. The invention can automatically adjust the working voltage of the brake according to the distance between the magnet of the permanent-magnet safe brake and a keeper, thereby reducing the power consumption to about 75 percent of the previous amount.

A connector having a substantially box-like housing having an insertion opening into which an FPC is inserted, a two-forked contact placed inside the housing, and a lever provided so as to face the insertion opening of the housing and pivotably held by the housing. The two-forked contact has a base section held by the housing, an upper arm and a lower arm that extend from the base section toward the insertion opening, and two-forked engagement arms extending from the base section in the opposite direction to the insertion opening. The lever has a grip section, a rotating shaft provided on the grip section and held by the housing, and a first plate cam provided on the rotating shaft and engaging the engaging arm. When the grip section is opened, the first plate cam widens the interval between the two-forked engagement arms, widening the interval between the upper arm and the lower arm of the two-forked contact.

The invention discloses a cover body overturning device, a mobile cleaning robot and a dust box cover opening-closing method. The cover body overturning device comprises a cover body, a cover body push rod and a force application mechanism, the cover body can turn over between a closing position and an opening position around a fixed axis, the force application mechanism can apply the acting forces on the cover body push rod, and the acting forces are finally applied on the cover body through the cover body push rod. A balance point is arranged in the overturning stroke of the cover body, andwhen the cover body is located at the side, close to the closing position, of the balance point, the acting force applied on the cover body push rod by the force application mechanism enables the cover body to move towards the closing position, and when the cover body is located at the side, close to the opening position, of the balance point, the acting force applied on the cover body push rod bythe force application mechanism enables the cover body to move towards the opening position, so that the cover body keeps a stable opening state in an opening state or keeps a stable closing state ina closing state.