166results about How to "Increase or decrease length" patented technology

Modular joint prostheses and components thereof are disclosed. In an embodiment, a joint prosthesis may include a head member, a neck member, and a stem member.

A twisted string actuator as a light-weight and space saving actuator includes a small motor and a twisted string having a structure in which two strings are twisted with each other loosely. A first end of the twisted string is connected to a finger joint, and a second end of the same is connected to a rotation shaft of the motor via a power transmission mechanism. When the rotation shaft of the motor rotates, a twisted state of the two strings of the twisted string is tightened or loosened, so that a length of the twisted string is decreased or increased. As a result, the finger joint is driven to rotate about the axis.

The invention discloses a method for grouting in a hole and effectively stopping the grout. The method is divided into two main action processes, namely grouting and stopping the grount and comprises the following steps: drilling a hole, grouting, expanding with an expansion rubber plug, grouting and disassembling. The device for realizing the method for grouting in the hole and effectively stopping the grout comprises a grout inlet pipe (1), a grout pipeline, an expansion stop-grouting plug (11) and a single-way pressure valve (14) which are sequentially connected, wherein the grout pipeline and the expansion stop=grouting plug (11) as well as the expansion stop-grouting plug (11) and the single-way pressure valve (14) are connected by joints. The technology can stop the grout at any section in the grouted hole with good effect. Besides, steel grout transmission pipes can be conveniently removed from the device, thereby reducing the waste of the materials while ensuring the grout stopping effect.

The invention relates to an artificial muscle aggregation group, which is formed by a plurality of muscle units connected in series, wherein each muscle unit comprises a plurality of springs as artificial muscles, a front connecting plate and a rear connecting plate which are respectively and fixedly connected with two ends of the springs; the springs are respectively and uniformly distributed along the surfaces of the connecting plates; each spring is internally provided with a guiding-locking mechanism in a penetrating manner; the two ends of the guiding-locking mechanism are respectively and fixedly connected with the front connecting plate and the rear connecting plate; the guiding-locking mechanism consists of a sleeve and a piston which is sheathed in the sleeve in a slidable manner; one end hidden in the sleeve, of the piston is provided with a circular convex ring; one end allowing the exposure of the piston, of the sleeve is provided with a step for preventing the convex ring from separating from the sleeve; the muscle unit at the foremost end and the muscle unit at the rearmost end are respectively connected with a high-strength fiber; and the artificial muscle aggregation group is also internally provided with a chaotic characteristic testing module which can judge whether the chaotic action exists currently and whether the output of displacement or tension of the artificial muscle aggregation group is qualified. The artificial muscle aggregation group has the advantages that the output of the tension or the displacement amount is large, and the output quality is guaranteed.

A recirculating pet fountain that includes a basin, pump and discharge where water pumped out the discharge is either received by an overflow tube and / or conveyed by a bridge toward water in the basin including into the tube. The bridge can include a channel and be configured so at least some discharged water clings to its underside via surface tension as water flows toward the basin. The tube has a mouth which can receive water from the bridge that can be free falling water that overflows from the tube into the basin. The tube can include one or more discharge ports that can include flow directors that help direct flow of water received in the tube that overflows out the ports. The tube can be length extensible and can include a flow adjuster that can increase effective tube length and can block one or more ports.

A rotor blade assembly for providing vertical lift to an aircraft, having a rotor head and a plurality of blades, with each blade attached to a mechanism such as a cam surface, whereby movement of the mechanism causes the radial distance between the distal tip of the attached blade and the center of the rotor head to alter, decreasing or increasing the length of the lifting surface. The blades are moved from a fully extended position providing maximum lift, to a retracted position in which the blades are removed from the airstream. The pitch of the blades may be controlled by a pitch controller to achieve full helicopter responsiveness. A plurality of bladeletts may be positioned near the outer periphery of the rotor head. When they are moved into the airstream, passing air impacts the bladeletts exerting a pressure, causing rotational movement of the rotor blade assembly.

A method of implementing a high-power coherent laser beam combining system in which the output of a master oscillator laser having a linewidth broader than the Stimulated Brillouin Scattering linewidth of the laser signal is split into N signals and fed into an array of N optical fibers. This is a modification of the self-synchronous LOCSET and self-referenced LOCSET phase matching systems in which the optical path length of each optical fiber is matched to less than the signal coherence length of the master oscillator by using a path length matching signal processor to modulate temperature controlled segments of each optical fiber.

A rotor blade assembly for providing vertical lift to an aircraft, having a rotor head and a plurality of blades, with each blade attached to a mechanism such as a cam surface, whereby movement of the mechanism causes the radial distance between the distal tip of the attached blade and the center of the rotor head to alter, decreasing or increasing the length of the lifting surface. The blades are moved from a fully extended position providing maximum lift, to a retracted position in which the blades are removed from the airstream. The pitch of the blades may be controlled to achieve full helicopter responsiveness. A plurality of bladeletts may be positioned near the outer periphery of the rotor head. When they are moved into the airstream, passing air impacts the bladeletts exerting a pressure, causing rotational movement of the rotor blade assembly.

The invention relates to the technical field of textile, in particular to a length-adjustable yarn bobbin which comprises a yarn bobbin body. The yarn bobbin yarn is in the shape of a hollow cylinder, an upper retaining plate and a lower retaining plate are arranged at two ends of the yarn bobbin body respectively, the yarn bobbin body is of a structure of three layers including an upper portion, a middle portion and a lower portion from top to bottom, the upper portion comprises the upper retaining plate and an upper bobbin body, the upper retaining plate is fixed at the top end of the upper bobbin body, an internal thread is arranged at the tail end of the side wall of the upper bobbin body, the lower portion comprises the lower retaining plate and a lower bobbin body, the lower retaining plate is fixed at the tail end of the lower bobbin body, an external thread is arranged at the top end of the side wall of the lower bobbin body, the middle portion comprises two through bobbins, the inner diameter of a first through bobbin is equal to the outer diameter of each of the upper bobbin body and the lower bobbin body, an internal thread and an external thread are arranged at two ends of the first through bobbin respectively, and the outer diameter of a second through bobbin is equal to that of each of the upper retaining plate and the lower retaining plate. After adopting the above structure, requirements on diverse and efficient product are met, and normal and efficient running of production is guaranteed.

The invention discloses a hydraulic expansion bolt. The hydraulic expansion bolt comprises a radial expansion device, an elastic sleeve, a connecting steel bar, an anchoring plate and a fixed frame. One end of the connecting steel bar is fixedly connected with the anchoring plate arranged on the earth surface, the other end of the connecting steel bar is fixedly connected with one end of the fixed frame, and the other end of the fixed frame is fixedly connected with the elastic sleeve. The radial expansion devices are axially arranged in the fixed frame and the elastic sleeve. The radial expansion device comprises hydraulic oil cylinders, a plurality of radial extension assemblies, an oil pipe and an oil pressure gauge, the hydraulic oil cylinders are fixedly installed on the fixed frame, the radial extension assemblies are hinged to piston rods of the hydraulic oil cylinders and evenly distributed in the circumferential directions of the piston rods, the oil pipe is connected with the hydraulic oil cylinders, and the oil pressure gauge is connected with the oil pipe. The hydraulic expansion bolt has the advantages that the hydraulic oil cylinders act on different positions of steel sheets, the contact areas of the steel sheets and anchoring hole walls are increased, and the bearing capacity of the anchor can be remarkably improved.

The invention discloses a system for detecting the explosion-proof performance of a separation explosion-proof material. The system comprises a computer, an explosion bin (3), a gas circulating pipeline (9), a main control system (1), and a first vacuumizing device (2), a liquid fuel steam supply device (4), a dry air supply device (5), an information acquisition device (6) and an ignition device (7) which are connected with the main control system (1) by virtue of leads, wherein the gas circulating pipeline (9) is communicated with the explosion bin (3); a temperature sensing device and a pressure sensing device are mounted on the inner wall of the explosion bin (3) at equal intervals; an ignition electrode is mounted on the inner wall of the starting end of the explosion bin (3) and is connected with the ignition device (7); the main control system (1) is connected with the computer. The invention also provides a method for detecting the explosion-proof performance of the separation explosion-proof material. The system for detecting the explosion-proof performance of the separation explosion-proof material can be controlled by a semi-automatic manner and is safe and reliable.

In a preferred embodiment, the present invention provides a vehicle mounting bracket having an adjustable linkage mounting portion. The mounting bracket is fixed to the vehicle and the linkage system, while adjustment bolts on the mounting bracket allow the user to adjust the vertical height of linkage relative to the vehicle. Scalloped adjustment joints of the linkage allow a user to modify the joint angle while effectively increasing or decreasing the length of the linkage members.

A stringed musical instrument employs string tensioners to support and apply tension to corresponding musical strings. Each musical string is supported by one string tensioner, and each of the string tensioners is linearly movable independent of others of the string tensioners. Further, an adjustment mechanism is provided for selectively linearly moving each string tensioner. In a preferred embodiment, an effective playing length of each string is defined between the associated string tensioner and the nut of the instrument. As such, individual linear adjustment of the string tensioners enables the user to vary the playing length of the associated musical string. In other embodiments, a string tensioner is provided that supports a musical string from a position on a side of the string opposite the associated musical instrument surface.

Method and marine acoustic source array for generating an acoustic wave in a body of water. The marine acoustic source array includes first and second external source sub-arrays, each sub-array including one or more individual source elements; a first actuator device connected to the first external source sub-array; and a second actuator device connected to the second external source sub-array. The first actuator device has a corresponding cable configured to connect to a first lead-in, and the second actuator device has a corresponding cable configured to connect to a second lead-in such that a position of the source array as a whole is controllable along a line substantially perpendicular to a path of the source array.

The present invention teaches minimally invasive apparatuses and methods for stabilizing and / or guiding medical instruments used in a variety of medical procedures, including (a) introducing one or more substances into a subject's body, (b) removing one or more substances from a subject's body, (c) manipulating a region of a subject's body, or (d) combinations thereof. Among the many advantages of the inventive apparatuses are their simplicity and adaptability to attach to a variety of retractors.

A pipe cleaning apparatus for cleaning pipes or tubes includes a plurality of scrapers and a plurality of spacers secured to a shaft. Each scraper includes a scraper body with an outer perimeter defining a scraper blade adapted to contact an inner surface of a tube and at least one radial slot defined by the body. Each of the scrapers and spacers are inserted onto a cylindrical shaft. Each spacer is sandwiched between two adjacent scrapers. The scrapers are adapted to contact an inner surface of a tube or a pipe.

A plurality of users of an on-demand bus each use an information terminal device to transmit, as a request, to an operation management center, reservation information including a desired boarding location at which to get on the bus, a desired boarding time, a boarding allowable additional time period for designating a desired boarding time slot, a desired drop-off location at which to get off the bus, a desired drop-off time, and a drop-off allowable additional time period for designating a desired drop-off time slot. The center determines an operation schedule for operating the bus, in consideration of a combination of the desired boarding time slots and the desired drop-off time slots within respective pieces of information, so that the plurality of users each get on the bus at the desired boarding location within the desired boarding time slot and get off the bus at the desired drop-off location within the desired drop-off time slot

The invention discloses a movable parking system, which comprises multiple movable three-dimensional garages and a support vehicle for providing multiple services for the multiple movable three-dimensional garages, wherein each movable three-dimensional garage comprises a movable garage composed of a garage body and multiple traveling wheels, a main driving mechanism which is arranged at the rear part of the movable garage and is used for lifting and descending the vehicle, an auxiliary driving mechanism which is arranged at the front part of the movable garage and is used for lifting and descending the vehicle, a horizontal parking board, a control system and a movable garage tractor for drawing the movable garage to move; and upper and lower layers of parking spaces are arranged in the garage body, and multiple parking spaces are correspondingly arranged on each layer of parking space. According to the invention, the parking system is reasonable in design, simple in structure, economical and practical, easy and simple to use and operate, and good in use effect; and the defects that the maneuverability is poor, the investment cost is high, wasting of resources is severe, a temporary parking requirement cannot be met and the like of the existing fixed type three-dimensional garage are effectively overcome.

A pair of thick steel plates are set up side by side such that an I groove with a narrow gap is formed between the facing edges of the plates, and a welding wire projecting from a welding torch of an arc welding unit with a constant voltage characteristic is inserted into the I groove obliquely from above with respect to the thickness direction of the plates. The welding torch is moved vertically while the distal end of the welding wire is caused to reciprocate inside the I groove in the thickness direction. At this time, the wire feed rate Vf is varied and also the extension L of the welding wire is increased or decreased so as to keep welding current Iw at a target value. Further, the wire feed rate Vf is subjected to incremental / decremental correction according to the moving direction of the torch.

The present invention discloses a new, more stable locking pin system for use in constructing adjustable exercise machine designs.

The invention discloses a household multi-angle bending electroscope capable of digital display. The electroscope comprises a penholder, the external surface of the front end of the penholder is provided with a digital display screen, a neon lamp is fixedly mounted in a position, close to one side of the digital display screen, in the external surface of the front end of the penholder, an angle knob is movably mounted in a position, close to the other side of the digital display screen, in the external surface of the front end of a casing, an induction measuring button is movably mounted in aposition, close to one side of the neon lamp and far from the other side of the digital display screen, in the external surface of the front end of the casing, and a direct measuring button is arranged in a position at one side of the induction measuring button and far from one side of the neon lamp. The household multi-angle bending electroscope capable of digital display can be connected with anexternal universal meter while electroscoping to display measured voltage and current and compare the voltage and current with those in a digital display screen, the precision of digital display canbe compared, simple maintenance of circuits can be carried out conveniently via tools in an auxiliary tool groove, an angle between the penholder and an extended rod can be adjusted, the length of a screwdriver head rod can be adjusted, and illumination can be provided during dark light at night.

A variable intake passage is made of a tubular space that is formed with a fixed member and a movable member arranged to face the fixed member and having a relative position with the fixed member changed. The movable member is moved to increase or decrease a distance of an air introducing portion from the combustion chamber to thereby change a passage length. The variable intake passage has a cross section that gradually increases from an upstream side to a downstream side in the air introducing direction. When the passage length of the variable intake passage is changed, the cross section of the air introducing portion of the variable intake passage is changed correspondingly.

The invention discloses an efficiently-adjusting module sliding system, and belongs to the technical field of module sliding auxiliary devices. The efficiently-adjusting module sliding system is characterized in that a diameter reducing radiation beam girder assembly in a diameter reducing assembly type module sliding platform and a fixed diameter radiation beam girder assembly are connected by a first splicing joint, a second splicing joint and a third splicing joint, and bolt holes of a first pull-out support, a second pull-out support, a third pull-out support and a fourth pull-out support in a concrete thickness adjusting mechanism are waist-shaped; the upper part and the lower part of an inner steel template in a template taper adjusting mechanism are respectively connected with a first upper connecting piece and a third lower connecting piece through bolts, and the upper part and the lower part of an outer steel template are respectively connected with a second upper connecting piece and a fourth lower connecting piece through bolts. The efficiently-adjusting module sliding system provided by the invention has the advantages that the cylinder wall thickness range suitable for the module sliding system is improved, each template can keep an exact tiny angle when the template is connected with a surrounding ring, and the length of a radiation beam is increased or reduced through changing the diameter reducing radiation beam girder assembly.