279 results about "Scissors mechanism" patented technology

An endoluminal support structure includes strut members interconnected by swivel joints to form a series of linked scissor mechanisms. The structure can be remotely actuated to compress or expand its shape by adjusting the scissor joints within a range of motion. In particular, the support structure can be repositioned within the body lumen or retrieved from the lumen. The support structure can be employed to introduce and support a prosthetic valve within a body lumen.

A modular actuator has a combination cam member and scissors mechanism in a compact unit that is capable of lifting heavy loads. A pull member is capable of controlling and combining two different mechanisms that travel at different rates through two ranges of motion. The cam member has a profile that is dimensioned and configured to maintain a constant range of motion.

A portable speaker having a base, a cover, a scissors mechanism, a positioning mechanism, a restoring element, a push-push type mechanism and a speaker module is provided. The scissors mechanism, the positioning mechanism, the restoring element, the push-push type mechanism are disposed between the base and the cover, respectively. The scissors mechanism translates the cover vertically. The positioning mechanism translates the cover to an original position, a first position or a second position. The restoring element repositions the cover from the first position to the original position or the second position. The push-push type mechanism fixes the cover to the original position or the second position. The speaker module is disposed in the base or the cover, wherein the sound from the speaker module is able to be output from the interval between the base and the cover when the cover is at the second position.

A narrow key switch for a low travel keyboard and methods of fabrication are described. The low-travel keyboard having narrow keys is suitable for a thin-profile computing device, such as a laptop computer, netbook computer, desktop computer, etc. The keyboard includes a key cap positioned over an elastomeric dome and a two-part scissor mechanism having two separate linkage structures on opposite sides of the dome. A link bar is also provided to transfer a load from a side of a key to the center if the key cap is depressed in an off-center manner. Transferring the load to the center helps to deform the elastomeric dome so that it can activate the switch circuitry of the membrane on printed circuit board underneath the dome. Separating the linkage structures into two separate parts allows for the use of a full-sized elastomeric dome for a narrow key switch. The full-sized dome provides the desired tactile feedback to a user. Thus, the tactile feel of the key is not compromised even thought the key is narrower than a conventional key.

In one form, a belt lifter apparatus provides increased lifting force and belt lift height by a scissors mechanism having crossed lifting arms each having a translatable end and having a translatable pivot axis between the lifting arms. Preferably, other ends of the lifting arms are fixed to an upper belt lifting member and to a lower support base member at locations such that the pivot axis translates to a position located substantially at the center of the lifted belt when the belt is lifted to the highest lift height. Lightweight, aluminum tubular members are used for the lifting member and the base support and each includes a track for supporting the translatable ends of the lifting arms. The span width of the base member is adjusted by sliding telescoping, tubular legs within the base tubular element. Pivoted wing arms are supported by braces extending to the belt lifting member.

A tire loading apparatus and method of packing tires that includes placing the tires in a rack, compressing the tires, and assembling the rack are disclosed. The apparatus includes one or more conveyors, scanners, and robots that load tires from a conveyor to a rack. A tire unloading apparatus is also disclosed. The unloading apparatus includes a scissor mechanism to raise and/or lower tire racks to an unloading platform. The unloading apparatus additionally includes one or more unloaders and conveyors. The sorting and unloading of tires is accomplished with one or more automated conveyors, scanners, and storage structures for reading information from incoming tires and using the tire information to sort and store the tires. A rack to improve compression and support of tires during storage and shipment is also disclosed.

Scissors on the distal end of a medical instrument are assembled highly accurately for cutting an object with ease. A scissors mechanism is assembled as a unit. The scissors mechanism has a pair of end effector members openably and closably fastened at proximal ends thereof by a bolt and nuts, while being held in a predetermined sliding state. The bolt has a central hole defined axially therethrough. The scissors mechanism is inserted into a tubular structure of a cover, which is coupled to the distal end of a joint shaft, and the end effector members are connected to a driven plate by links. A spacer is placed in a gap between the scissors mechanism and an inner surface of the cover. A pin is inserted, from an outer surface of the cover, into a hole of the cover and the central hole of the bolt.

The invention discloses a novel conducting wire end ground clip, which comprises a wire clip main body, an auxiliary wire clip, a control lever and a driving mechanism. By combining and using the control lever, a crank link mechanism and a scissors mechanism, the chuck stroke of the wire clip is amplified to fulfill the aim of reducing the spiral circles and reducing the labor intensity. A chuck can be opened and closed by only rotating the control lever so that clamping and loosening actions of a high-voltage cable are quickly finished. With the innovation, the problem of overmany rotating circles of a wire clip of the conventional pure screw rod mechanism is solved, so that construction operation is simpler and more convenient, and the workload of detection personnel can be effectively reduced. Besides, the novel conducting wire end ground clip meats the requirement of adjustable angle between the wire clip and the control level by using an angle adjustment positioning bolt and an arc limiting slot of a sector plate.

Disclosed is a scissor lift including a bottom frame a top frame, a scissor mechanism arranged between the bottom frame and the top frame to displace the bottom frame and the top frame in relation to each other by means of the force provided by a linear actuator, a gearing arranged between the scissor mechanism and the linear actuator, where the linear actuator has a linear actuator point of attack at one end of a lever arm of the gearing, wherein the bottom frame is connected to a bottom frame point of attack at another end of the lever arm and wherein the scissor mechanism is connected to the lever arm through a lever arm pivotal joint arranged between the linear actuator point of attack and the bottom frame point of attack.

The invention provides a toilet auxiliary wheelchair, which can help the user to sit on a flush toilet and defecate without leaving the wheelchair. The toilet auxiliary wheelchair comprises a wheelchair, a seat height adjusting mechanism, a human body position adjusting mechanism, a seat plate folding and unfolding mechanism and an electric control system, wherein the seat height adjusting mechanism is formed by two hydraulic rod mechanisms, two scissors mechanisms and two base plates, and can adjust the height of seat to suit different flush toilets; the human body position adjusting mechanism is formed by two hydraulic rod mechanisms, two inner side armrests and a support plate, the support plate is arranged on the fore part of the thigh to bear the gravity of the lower body, so that the trousers can be taken off when the human body is elevated. The seat plate folding and unfolding mechanism is formed by a motor and rack-and-pinions. The pinions are rotated and driven by the motor, the racks are arranged on the two sides of the pinions and fixed with the two seat plates, and the racks are driven by the pinions to move towards the opposite direction, so as to realize the folding and unfolding of the seat plates. The toilet auxiliary wheelchair can be adjusted to suit different flush toilets and has extensive applicability.

The invention provides a temperature-control high-speed large-strain membrane two-way stretching device and an experimental method thereof. A servo motor drives four #-shaped guide rails to move, and a membrane sample is stretched through a scissors mechanism. A high-pressure pneumatic clamp quickly clamps the sample and can realize pressure compensation. Two independent temperature control furnaces are respectively used for preheating the device and stretching the sample. A hot air circulating system can be adopted to realize rapid temperature rise of the control furnaces and also can ensure the temperature uniformity of cavities. Tension sensors are respectively mounted in two stretch directions and used for collecting stress-strain information in the membrane stretching process. The servo motor drives a ball screw so as to enable a stretch part to be switched among different stations. The temperature-control high-speed large-strain membrane two-way stretching device can realize two-way synchronous stretching, two-way asynchronous stretching, limited one-way stretching and unlimited one-way stretching, thus being a good device for simulating industrial membrane stretching processing and establishing the relationship between processing parameters and the membrane structure performance.

An apparatus having an upper frame adapted to at least partially encircle a person and including a lower frame and two double scissor mechanisms for coupling the upper frame to the lower frame, wherein the distance between the upper frame and the lower frame can be varied by adjusting the double scissor mechanisms, and the walker is raised or lowered. Scissor lift assemblies housed in the lower frame, each powered by a motor or compressor, raise and lower each double scissor mechanism.

A lifting device adjusts the height of a top part relative to a base part for a patient couch. The lifting device includes an elevator mechanism and a drive unit for height adjustment. The elevator mechanism has a scissor mechanism with two scissor arms, which are pivotably connected together via a scissor pivot joint. The elevator mechanism further includes an elbow mechanism having two elbow arms, which are pivotably connected together via an elbow pivot joint. Each of the elbow arms is linked to a scissor arm via a linking pivot joint.

The invention provides a constant width film stretching device combined with X-ray scattering, and an experimental method thereof. The device employs two Yaskawa servo motors to drive a ball screw to stretch a sample. The rotation of the motors is controlled by a Labview software. One end of the device is configured to a tension sensor for tracking tension change during a stretching process. During the stretching process, scissor mechanism fixtures are employed perpendicular to the stretching direction, so as to guarantee that the width of the sample can be kept constant during the stretching process and chuck points move uniformly along with the sample. The device employs a forced nitrogen stream to equalize temperature distribution in a sample cabin and reduce thermal degradation of the sample at a high temperature. Two temperature monitoring points are pre-set in the sample cabin. The temperature is precisely controlled by the temperature controller. The device has the advantages of easy disassembly and assembly and the like, is very suitable for combination with synchrotron radiation line stations, and is a very good device for studying the relationship between a structural evolution behavior and the film properties in film stretching and processing.

The invention relates to an electromagnetic coil winding apparatus. The winding apparatus comprises bases, a scissors mechanism, a winding shaft, support shafts, a transmission shaft, a pretightening mechanism, a cable pushing mechanism and a driving part. The transmission shaft rotates to drive a reel to rotate, and drives a cable supply framework to rotate relative to the winding shaft through a cable and to perform winding on the reel. The electromagnetic coil winding apparatus is simple in structure, can achieve that no interval exists in the winding process. The winding is tight at any time and the winding interval is controllable. Pretightening force is applied to the cable supply framework by the pretightening mechanism, as a result, the cable is in tight contact with the outer surface of the reel. Moreover, the electromagnetic coil winding apparatus can ensure that the cable is tightly wound and moderate pretightening force is existent, thereby ensuring the reasonable slot filling factor, improving the winding height, lowering the defective rate of the electromagnetic coil in the winding process and improving the production efficiency.

A scissor-type lifting table has a carrying device (10) and a base device (11). A scissor mechanism comprising first and second scissor-blade arrangements are arranged between the carrying device (10) and the base device (11). The carrying device (10) can be moved away from the base device (11) by means of a lifting truck (3) which can be moved via at least one traction mechanism (4), by winding up of the traction mechanism (4), and can be raised up in order to open the scissor mechanism and can be lowered in order to close the scissor mechanism by unwinding the traction mechanism (4). At least one lifting cam (8) is provided which is configured to regulate the lifting capacity and along which the lifting truck (3) runs during the raising or lowering of the carrying device (10).

A multi-function, adjustable chiropractic table comprises a body section fixed to a table frame. A cervical section is pivotally attached to the table frame and securable at a desired angle. The cervical section comprises a padded head support, forehead strap, and neck bolsters. The head support is slidably mounted in a tray and translatable therein using a scissors mechanism, for linear axial traction. Pivotally mounting the tray to the cervical section permits lateral traction. A four-bar linkage, including a base frame, permits raising/lowering of the table using an actuator activated by a foot triggered wave switch comprising proximity sensors. The body section comprises a chest, lumbar, and leg sections. The chest section is replaceable with a treatment module comprising hot and cold compresses, or a laser enhanced spinal decompression therapy apparatus comprising a laser driven by two linear actuators to emit light according to one or more treatment protocols.

The invention is suitable for the field of medical equipment, and provides a scanning bed which comprises two groups of linear guide rails, a bed plate, a sliding lifting mechanism and a power source, wherein the second group of linear guide rails is arranged below the first group of linear guide rails in parallel; the lower end face of the bed plate is fixedly connected with the first group of linear guide rails; a first group of guide rail brakes and a second group of guide rail brakes are respectively connected to the first group of linear guide rails and the second group of linear guide rails, a first group of guide rail sliders and a second group of guide rail sliders are respectively connected to the first group of guide rail brakes and the second group of guide rail brakes; the upper ends and lower ends of a first group of connecting rods of a scissor mechanism are respectively connected to the first group of guide rail sliders and the second group of guide rail sliders; the upper ends of a second group of connecting rods are fixedly connected to the lower end face of the bed plate, the lower ends of the second group of connecting rods are connected to the second group of guide rail sliders; a ball screw is parallel with the second group of linear guide rails, and a horizontal movement piece is connected with the second group of guide rail sliders and the ball screw; and the power source is connected to the head end of the ball screw. Therefore, the scanning bed provided by the invention achieves the purpose of providing power drive for a horizontal movement mechanism and a lifting mechanism of the scanning bed by only using one power source.