40results about How to "Swing free" patented technology

A compact and easy-to-use walking assisting device capable of reducing constrained feeling given to a user and allowing a free swing of the arms of the user in walking. The walking assisting device comprises one or more leg links to which ground contact members are connected at their lower ends respectively and a load transfer portion connected to the upper ends of the leg links, in which at least a part of the weight of the user is supported by the leg links via the load transfer portion, wherein the load transfer portion includes a seat member for the user to sit astride, wherein connecting portions with the upper ends of the leg links connected thereto are attached to the undersurface of the seat member, and wherein the connecting portion have a degree of freedom allowing the forward/backward and lateral swings of the leg links.

A pet door offering ingress or egress through a structural member. A lock mechanism in the pet door allows the pet owner to restrict ingress and/or egress as desired. The pet door features a dual control system that simplifies the setting of the lock. Each control corresponds to movement of the flap in one direction. The dual control system is also designed to be easier to access than a conventional pet door lock mechanism and to be less susceptible to unintentional adjustment resulting from incidental contact with the controls.

The invention relates to a soil insensitive polycarboxylic acid water reducer and a preparation method of the reducer. The water reducer is prepared by taking a 4-hydroxybutyl vinyl ether macromonomer, unsaturated carboxylic acid, unsaturated sulfonate and an unsaturated ester micromonomer as a comonomer, and an initiator and a chain transfer agent as a molecular regulator for copolymerization reaction. A mass ratio of the 4-hydroxybutyl vinyl ether macromonomer to unsaturated carboxylic acid to unsaturated sulfonate to the unsaturated ester micromonomer to the initiator to the chain transfer agent to deionized water is (24-120):(4-8):(6-8):(10-20):(0.8-1.5):(0.4-2):(70-120). The invention further provides the preparation method of the water reducer. The water reducer is insensitive to a sand content of a sandstone material in concrete; when the water reducer is used for the concrete with the high sand content, the water reducer has higher water reducing capability and smaller slump loss than the traditional polycarboxylic acid water reducer; and the water reducer solves the problem that the traditional polycarboxylic acid water reducer is sensitive to soil, a raw material of sandstone, in the concrete application.

An S-shaped robot comprises a plurality of main body modules, a plurality of joint modules and a driving control module. Every two adjacent main body modules are connected through one corresponding joint module. Each joint module comprises a joint swinging arm. The driving control module is used for driving at least one joint swinging arm to swing relative to the former main body module connected with the joint swinging arm, and/or driving at least one joint swinging arm to swing relative to the latter main body module connected with the joint swinging arm. The swinging direction of each joint swinging arm relative to the former main body module connected with the joint swinging arm is perpendicular to the swinging direction of the joint swinging arm relative to the latter main body module connected with the joint swinging arm. By the adoption of the scheme, the complexity of a whole joint steering mechanism is effectively reduced, and meanwhile the transmission accuracy is improved.

The invention discloses a mixed alcohol polyoxyethylene ether water reducing agent macromonomer, and a preparation method and application thereof. The preparation process of the mixed alcohol polyoxyethylene ether water reducing agent macromonomer comprises the following steps of in the nitrogen gas atmosphere, performing mixing and stirring reaction on potassium hydroxide, sodium series catalysts, methallyl alcohol, allylic alcohol and ethylene oxide; performing synthesis to obtain mixed alcohol polyoxyethylene ether intermediates; performing reaction on the mixed alcohol polyoxyethylene ether intermediates and ethylene oxide in the nitrogen gas atmosphere; performing synthesis to obtain a final product mixed alcohol polyoxyethylene ether which is a macromonomer used for preparing a polycarboxylic acid water reducing agent. The mixed alcohol polyoxyethylene ether synthesized and obtained by the method simultaneously have the basic molecular framework structure of allylic alcohol and methallyl alcohol; when the mixed alcohol polyoxyethylene ether product is used for preparing the polycarboxylic acid water reducing agent, and the polycarboxylic acid water reducing agent is applied to cement, the water reducing performance can be maintained; meanwhile, good dispersion maintaining performance can be realized.

The invention relates to a modular infant carrier apparatus and method. In one embodiment, a sling comprising a tail portion and two arm portions supports an infant when rings at the ends of the tail portion and arm portions are brought together at a single point above the infant. The rings are held together by a clamp, and the clamp allows the sling to be attached to space-saving receivers including a wall-mounted hook, a ceiling-mounted hook, a door-mounted hook, a hook attached to a heavy item of furniture, a stand-mounted hook, an over-door hook, or an item of clothing worn by an adult. In one embodiment, the sling can be moved from one receiver to another using a single hand, without removing the infant from the sling. Other embodiments are described and shown.

The invention discloses a passive sliding-swinging cable passing bridge device. The cable passing bridge device comprises a base, a swing arm, a guide rail, a slide block and a cable bracket, wherein the base is used for fixing the cable passing bridge device on a carriage; the swing arm is arranged on the base, and can swing freely relative to the base; the guide rail is arranged on the swing arm; the slide block is arranged on the guide rail, and connected with the guide rail in a matching way; and the cable bracket is used for supporting and fixing a cable, is connected integrally with the slide block, and can slide freely along the guide rail along with the slide block. The sliding and swinging of the passive sliding-swinging cable passing bridge device provided by the invention are passive sliding and swinging due to cable deformation, so that the passive sliding-swinging cable passing bridge device can adapt to the change of the cable without dragging the cable. Moreover, a motion combination of sliding and swinging perfectly adapts to optional linear or nonlinear change of the cable in a fan-shaped working region, thereby preventing damage to the cable or loosening of a plug caused by dragging.

The invention discloses a preparation method of a polycarboxylate superplasticizer for small-slump concrete. The preparation method comprises the following steps: 1, an ethylene glycol monovinyl polyethylene glycol ether macromonomer, tap water, sodium hydroxide, unsaturated carboxylic acid and 2-acrylamide-2-methylpropanesulfonic acid are added into a four-necked flask one by one, and are uniformly stirred; 2, unsaturated carboxylic acid, tap water and other materials are uniformly mixed to obtain a solution A, and a reducing agent and tap water are uniformly mixed to obtain a solution B; 3,the solution A and the solution B are dropwise added into the four-necked flask at the same time and are reacted; and 4, the pH value of a polymer prepared in step 3 to 5-7 by using an alcohol amine monomer. The polycarboxylate superplasticizer synthesized by adopting the novel polyether in the preparation method improves the wrapping property and winding property of a polyether side chain, so theconcrete has good workability and good flow retentivity, the plasticity and cohesiveness in small-slump concrete are improved, and hysteresis bleeding is avoided; the polycarboxylate superplasticizerhas low sensitivity to the water consumption of concrete, and has a good water-retaining property; and the preparation method has the advantages of simple production process, no generation of wastes,greenness, environmental friendliness, short reaction period, and easiness in realization of large-scale production.

The invention discloses a zipper with a self-locking function. The zipper comprises zipper heads, two zipper bands and multiple zipper teeth arranged on the zipper bands; the zipper heads comprise clamping board parts which are used for clamping the zipper bands inside and made of plastic, a locking part which is located on the clamping board parts and a pull ring which is located on the locking part and made of plastic, wherein the locking part comprises a vertical board part which is perpendicular to an upper clamping board and made of plastic, a square groove is formed in the vertical board part in the length direction, and a square hole is further formed in the portion, located on an extending line of the frontward side of the square groove, in the vertical board; a square rod made of plastic is inserted into the square hole and connected to a sliding block which is located in the square groove and made of plastic, and a magnet is fixed to the lower end surface of the sliding block. The self-locking zipper is simple in structure and convenient to operate, the locking part is arranged on the zipper, after the zipper teeth of two sides are meshed with each other, a pull head is clamped by the locking part and accordingly cannot slide, and thus the aim of locking is achieved.

The invention relates to a protector with an expansion element. The protector is mainly used for protecting a joint and a limb connected with the joint, which helps the limb part properly swing, extend and twist. The protector comprises a first protecting element, a second protecting element and the expansion element, wherein, the first protecting element is used for covering the limb part, the second protecting element is used for covering the joint, and the expansion piece comprises a first connecting part, a second connecting part and an expansion part; the expansion part is positioned between the first connecting part and the second connecting part, the first connecting part is connected with the first protecting element, the second connecting part is connected with the second protecting element, and the expansion part is of a platelet with continuous convex parts and concave parts.

Disclosed is a transformable motorcycle frame which is formed by combining a left frame, a linkage mechanism, a right frame, connecting shafts and a connecting square block. The left frame and the right frame are of an independent structure in mirror symmetry and are connected to form a firm spatial frame structure under simultaneous connecting action of a crossed connecting shaft, the connecting square block, a main connecting block, a rear connecting shaft and a lower connecting shaft; the linkage mechanism is mounted between the left frame and the right frame by utilizing the crossed connecting frame, a bottom fork connecting shaft and the main connecting shaft and composed of the crossed connecting shaft, a bidirectional hydraulic cylinder, a hydraulic power unit, a pull rod, a rocker arm, a single damper and a bottom fork; under acting force of extension and contraction of the hydraulic cylinder, an included angle between central axis of a vertical pipe of the crossed connecting shaft and the horizon and an included angle between a plane on which the bottom fork is positioned and the horizon are increased or decreased at the same time, and barycenter of a motorcycle body is lifted or lowered accordingly, so that front-wheel dragging distance of a motorcycle is changed, shape of the motorcycle is changed as well, driving posture is changed, and driving fatigue is relieved.

The invention relates to the technical field of concrete admixtures, and particularly discloses a high-water-retention type polycarboxylate superplasticizer and a preparation method thereof. The high-water-retention type polycarboxylate superplasticizer is prepared from a monomer A, a monomer B, a monomer C, a monomer D, an initiator, a catalyst, a chain transfer agent and water through free radical copolymerization reaction and neutralization with an alkaline solution. The preparation method of the high-water-retention polycarboxylate superplasticizer is simple, and the water retention capacity of concrete can be improved while the water reduction and slump loss resistance of the concrete are ensured.

The invention relates to a preparation method of a high-solid-content early-strength polycarboxylate superplasticizer, which comprises the following steps: (1) adding unsaturated polyoxyethylene ether monomer and sulfonic functional monomer into water to prepare a base material with the concentration of 40-50%, and stirring and dissolving at the temperature of 5-10 DEG C; (2) after the unsaturated polyoxyethylene ether monomer and the sulfonic functional monomer in the step (1) are completely dissolved, adding an oxidizing agent at one time or gradually dropwise adding in a stirring state; (3) after the reaction in the step (2) is carried out for 5-15 minutes, preparing a 4-8% mixed solution B from a chain transfer agent and a reducing agent, and preparing a 15-20% solution A from an alkylene functional monomer; adding the solution A and the solution B into a flask at one time to react for 1.5-2.5 hours or gradually dropwise adding the solution A and the solution B into the flask for 3-3.5 hours by using a peristaltic pump to react; and (4) after the reaction in the step (3) is finished, carrying out heat preservation and aging for 0.5-1 hour, and adding an alkaline neutralizer accounting for 5-6% of the total mass at one time for neutralization. Compared with the traditional 40% solid content polycarboxylate superplasticizer, the polycarboxylate superplasticizer provided by the invention has the advantages of high production efficiency, high effective storage rate, good dispersibility and green and environment-friendly production process, and can obviously improve the early strength of concrete.

The invention provides a tool fixture for large-size sapphire single crystal. The structure is entirely composed of a hanging ring, two semi-door-shaped clamping arms, a bidirectional thread structureused for expanding or tightening the clamping arms, and a clamping head for clamping. The tool fixture is characterized in that the hanging ring is fixed at the connecting position of the two clamping arms through a bolt; the upper parts of the two semi-door-shaped clamping arms are connected through an eyebolt, so as to ensure that the included angle between the two clamping arms can be randomlyadjusted, and the lower parts of the two semi-door-shaped clamping arms are welded onto the clamping head for clamping; the bidirectional thread structure is composed of two bolts and a nut. The toolfixture provided by the invention is simple in structure, good in fastening effect, and is beneficial to the taking out of the large-size sapphire single crystal from a crucible.

The invention relates to a hand-held tool, comprising a housing (1), a motor (2) arranged therein and having a motor shaft (3), and a tool shaft (4) which is received rotatably in the housing (1) and which is drivable by the motor shaft (3) via a transmission (6), wherein the transmission (6) comprises at least two mutually engaging toothed wheels (7,8), a first toothed wheel (7) of which is coupled to the motor shaft, wherein the first toothed wheel is situated, as seen in longitudinal direction of the motor shaft, in line with the outer end of the motor shaft, wherein the first toothed wheel is mounted in the housing (1).

The invention provides a hinge connection rod-type high-efficiency self-cleaning device. The hinge connection rod-type high-efficiency self-cleaning devices are respectively arranged in a total-pressure taking pipe and a static-pressure taking pipe of a S-shaped pitot pipe-type gas flow rate measurement element, the length of each hinge connection rod-type high-efficiency self-cleaning device penetrates through the total-pressure taking pipe and the static-pressure taking pipe until extends to a total-pressure taking hole and a static-pressure taking hole, each hinge connection rod-type high-efficiency self-cleaning device comprises an installation bolt, a plurality of right ash cleaning rod joints, a plurality of hinge connection joints and an ash cleaning pendulum, upper ends of the hinge connection rod-type high-efficiency self-cleaning devices are respectively and fixedly arranged at upper parts of the total-pressure taking pipe and the static-pressure taking pipe by the installation bolts, each rigid ash cleaning rod joint is connected by the hinge connection joint, the bottom of the installation bolt is connected and fixed with the hinge connection joint at the uppermost end,and the ash cleaning pendulum is welded with a lower part of the rigid ash cleaning rod joint at the lowest end. By the hinge connection rod-type high-efficiency self-cleaning device, the swinging flexibility and irregularity of the ash cleaning device can be improved so as to achieve most excellent ash cleaning effect.

The invention discloses an extensible supporting leg component which comprises a supporting leg A, a transverse fixed member A, a transverse fixed member B, a supporting leg B, a transverse moving member B and a transverse moving member A. One end of the transverse fixed member A is connected with one end of the transverse fixed member B, and the other ends of the transverse fixed member A and thetransverse fixed member B are correspondingly mounted on the upper sections of the front ends of the supporting leg A and the supporting leg B respectively; a corner connector support is mounted on the middle section of the inner side of each of the supporting leg A and the supporting leg B, the corner connector mounted on the supporting leg A is connected with one end of the transverse moving member A, the other end of the transverse moving member A is connected with one end of the transverse moving member B, and the other end of the transverse moving member B is connected with the corner connector support mounted on the middle section of the inner side of the supporting leg B; connector clamping members with opposite openings are symmetrically arranged on left and right sides of a connection point of the transverse moving member A and the transverse moving member B. The extensible supporting leg component has the advantages of being contractile and stable in structure.

The invention relates to a device assembly formed by arranging a heat exchanger of a heat pump of a laundry dryer on a mounting base. Process air of the laundry dryer flows through the heat exchanger; the mounting base is associated with a bottom assembly of the laundry dryer. An intermediate space is provided between the heat exchangers as viewed in the flow direction of the process air. In the intermediate space, the transition of the channel section of the process air channel formed by the two heat exchangers is laterally delimited by two connecting elements which are vertical, parallel and spaced apart. The connecting elements are connectable to the mounting base and to the upper end cap and each rest against a heat exchanger contact surface. In order to provide a device assembly for sealing a process air channel in an intermediate space, which can be produced by means of a simple and suitable device for mass production, the connecting element is provided with a sealing element over the entire section of the longitudinal edge of the connecting element; a flat contact surface of the heat exchanger placed on the mounting base rests on the sealing element.

The invention relates to the technical field of subway construction, in particular to long-distance feeding equipment for subway grouting, which comprises a first conveying pump, a conveying unit and a grouting unit, the first conveying pump is arranged in a subway ventilation pavilion, the lower end of the first conveying pump is provided with the conveying unit, and the grouting unit is arranged in a subway tunnel; at present, when grouting raw materials are poured, the following problems exist: most of the current grouting materials are manually carried into a subway tunnel, so that the conveying efficiency of the grouting raw materials is influenced; due to the fact that the weight of the pipeline is increased in the grouting process, workers are difficult to lift the grouting pipeline to move, and the labor amount of the workers is increased; the equipment can replace manual operation to carry grouting raw materials, and the conveying efficiency of the grouting raw materials can be improved; the grouting pipeline can move along with workers, and therefore the labor amount of the workers during grouting raw material pouring can be reduced.