427 results about "Sharp point" patented technology

An ultrasonic surgical blade includes a body having an external surface, at least one cutting edge, and a distal end. In at least one embodiment, the cutting edge can be defined by first and second surfaces which define an angle therebetween. In various embodiments, at least a portion of the cutting edge comprises a sharp point. In other embodiments, at least a portion of the cutting edge and surface comprise a sharp point and or a beveled surface.

The skin preparation device and sensor of the present invention include an array of rigid tines. The tines serve to “self-prepare” the skin at each electrode site. These tines, when pressed against the skin, penetrate the stratum corneum, thereby reducing skin impedance and improving signal quality. A self-prepping device of the present invention is an optimized array of short non-conductive rigid tines in which the individual tines are created in a geometry that allows for a sharp point at the tip when molding, machining or etching is used as a method of fabrication. This non-conductive array with rigid penetrating structures may, therefore, be used in combination with a conductive medium, preferably an ionic conductive gel. In penetrating the stratum corneum, micro-conduits are created in the layers of the skin enabling the conductive medium to reach the low impedance layers and to transmit bioelectrical signals from the skin to the electrode surface. Such a self-prepping device can be readily mass produced using molding methods or possibly other manufacturing methods, thereby providing for a low cost means of achieving improved performance of the biopotential sensor. Additionally this invention includes the integration of this self-prepping device into a biopotential sensor comprising an array of one or more electrodes.

A self-deploying cover for protection against unintended pricks from injection devices. The cover comprises a base which engages the injection device, and a protective sleeve which covers the sharp point and moves relative to the base to expose and cover the sharp point. The sleeve is guided by a projection which rides within a generally V-shaped groove formed in the base. The groove comprises deflectable arms which deflect to pass the projection, but which oppose return of the projection after passing. The sleeve is spring urged to the extended position and is automatically withdrawn during injections. After an injection, the sleeve is locked into the extended position by the last deflectable arm.

A needle disclosed herein may include an elongate body extending between a proximal end and a distal end with a central longitudinal axis defined by the body, where the distal end includes a single sharp point along the central longitudinal axis and defining a distal end terminus three longitudinal fluted surfaces converging at the distal end terminus; and three longitudinal beveled cutting edges defining borders between the fluted surfaces and converging at the distal end terminus. Needle embodiments may include one or more ports open into and/or proximal of the fluted surfaces and communicating with one or more longitudinal needle lumens.

An indwelling needle assembly has an inner needle having a sharp point at its tip, an inner needle hub fixed to the base end of the inner needle, a hollow outer needle in which the inner needle is inserted, and a seal section provided in the outer needle hub. In the indwelling needle assembly, the seal section has open/close means having a seal section body with a hole into which the inner needle is insertable, a shutter member for opening and closing the hole, and an urging member for urging the shutter member in the direction to close the hole.

The invention relates to the technical field of computer vision and discloses a measuring method and a measuring device for the height of a human body based on a binocular vision technique. According to the measuring method and the measuring device disclosed by the invention, the height of a human body target is measured by acquiring image coordinates of a human head sharp point of the human body target in a scene image shot by a binocular camera and depth information corresponding to the image coordinates and calculating world coordinates of the human head sharp point under a coordinate system of the camera. According to the measuring method and the measuring device, the requirement on the compatibility of a measured person is low, and the height measurement can be finished by a mode that the person stands within the measurable range for shooting by the camera; the body heights of multiple persons in the scene can be simultaneously measured; in addition, the measurement precision is higher.

A mechanical broadhead for attachment to an arrow having a broadhead body including a plurality of blade windows formed therein, a geometrically angled retractable blade attached within each of the blade windows, retaining springs for retaining the blades in a retracted position during flight, a front body slidably mounted onto the broadhead body, and a front tip secured to the front body. Upon contact with a target, the front tip and front body slide rearwardly into an end of the geometrically angled blades, thus pushing each of the blades through the blade windows into a deployed position. The blades of the broadhead are reset by inserting a sharp point underneath an end portion of the retaining springs and applying a slight twisting motion allowing the blades to retract back into the broadhead body into a loaded position.

The invention discloses an internal waverider-derived turbine base combined dynamic gas inlet adopting a binary variable-geometry manner. The internal waverider-derived turbine base combined dynamic gas inlet structurally comprises a gas inlet internal waverider compression section 1, a throat section 2, an expansion and distribution section 3, a punching channel 4, a turbine channel 5, a fixed-geometry three-dimensional internal waverider compression representing section 6, an adjustable internal waverider compression representing section 7, an adjustable internal waverider compression section representing variable-geometry compression surface 8, an adjustable expansion representing section 9, a sharp point-free distribution representing section 10, a machine body proximity representing movable upper arm 11, a movable upper arm driving representing servo action cylinder 12, a distribution representing plate 13, an internal waverider-derived fixed-geometry representing profile 14 and a distribution representing cross section 15. The internal waverider-derived turbine base combined dynamic gas inlet has the advantages of small outer resistance, high flow coefficient, good airflow quality and the like; meanwhile, profile deformation and distribution plate deflection caused by compression in a three-dimensional internal waverider manner can be controlled by only two regulating parameters, the deformation is convenient and reliable, and the requirement on an acting servo device is relatively easily met.

A method and system for compressing and displaying a digital ink trace. Raw ink data is smoothed, and sharp points of the smoothed line are found. Curve-fitting is then used to generate a mathematical expression that defines the line segments between adjacent sharp points. The ink trace then is represented by a backbone spline that includes the sharp points and the mathematical expressions for the line segments. Thickness information, such as pressure or acceleration information, is combined with the backbone spline to provide a compressed ink file that represents a contour curve of the original ink trace. A display module uses an algorithm to separate the contour curve into a sequence of straight lines. A set of pixels is then generated for the display of each straight line using a novel antialiasing method. The pixels at the ends of adjacent straight lines are aligned using a weighting algorithm.

A bow and arrow stand, engaging the ground and holding an archery bow in an erect and upright position without contact with the bow string includes a vertical support shaft with an angular middle portion, an upper vertical portion and a lower vertical portion with a ground end tapering into a sharp point which is inserted into the ground, two padded horizontal members attached to the angular middle portion, an arrow quiver suspended from the lower vertical portion, a secondary ground engaging spike with a horizontal arm attached to the lower vertical portion, and a magnetic accessory bowl attached to the upper vertical portion to hold archery tools and accessories.

A hydrodynamic suturing instrument, comprising an elongated cannulated suturing needle having a distal end configured to carry a suture through tissue and a proximal end adapted to connect to a syringe barrel and a lumen extending form said proximal end to an opening at the distal end for having a size for the passage of a suture, the opening at the distal end configured to receive a suture extending from the lumen along an outer surface of the needle wherein a sharp point extends forward of the suture. A companion instrument includes forceps having a distal end with jaws and a proximal end with a cannula extending from the proximal end to the distal end for passage of the needle, and the jaws having an opening enabling passage of the needle through tissue grasped in the jaws.

A hand-operable and portable pencil sharpener which is comprised of a housing having a conical cavity therein. The cavity is of circular cross-section and defines an open inlet end tapering to a narrow inner end. A collar is provided about the open inlet end and formed integral with the housing. A pencil centering insert is rotatably secured in the collar by a flexible and removable snap ring. A slot is provided along the side wall of the conical cavity and a blade having a,sharp edge is secured adjacent to the slot with the sharp edge projecting slightly into the cavity whereby to shave a portion of the wood and lead on the extremity of a carpenter's pencil rotated in the conical cavity and centered by a centering slot in the pencil centering insert. An abrading element is secured to the housing to permit the abrading of a sharp point on the end of the lead.

The invention discloses a cycloid and spiral composite milling method for a web with slot features. The cycloid and spiral composite milling method is characterized by comprising the following steps: firstly, feeding a tool in a spiral manner; secondly, slotting by adopting cycloid to reduce cutting force of a first tool; thirdly, machining layer by layer by adopting a spiral machining tool path and transiting by adopting variable spiral at a corner, so that the curvature changes continuously, and the cutting force mutation caused by the mutation of a sharp point and a machining direction in the tool path is avoided, the stability of a tool load is guaranteed, and the vibration of the tool is reduced; and finally, machining by adopting a corner loop milling tool path at the corner. The cycloid and spiral composite milling method can be used for machining a material which is difficult to machine; the cutting force of the first tool is reduced by cycloid slotting; the variable spiral curve is adopted at the corner of the tool path; the mutation of the sharp point and the machining direction is avoided, so that the tool path is smooth; the cutting force is reduced; the machining quality of the surface of a workpiece is improved.

A wearable lightweight fire fighter's personal escape system and method includes a rope, having a distal and proximal end, organized in parallel segments disposed in an inner pouch. The inner pouch is entirely contained in an outer pouch that is appointed to be removably attached to a belt or harness, worn by a fire fighter. The proximal end of the rope exits through an opening in the inner pouch and outer pouch and is attached directly to a lightweight hook, or optionally enters a belay device. The hook has a sharp point for creating a purchase point on soft surfaces, a hook opening having sufficient diameter to surround radiators, steam pipe and the like, and capture rope that surrounds substantial objects. The hook has a central opening appointed for holding a firefighting tool to aid in creating a substantial object. The fire fighter escapes by creating a purchase point and repelling at a high speed or at a controlled speed by adjusting belay friction.

A landscape utility knife assembly discloses a single tool that can puncture the middle of a landscape liner and make the incisions necessary to place plants in the middle region of a landscape or garden area. The knife assembly consists of a replaceable blade and housing. The housing is composed of three regions: a handle region, a blade region, and a penetration region. These regions, which compose the housing, are arranged geometrically to form an acute angle. The tip of the penetration region forms a sharp point that can puncture a landscape liner. The penetration region is adjacent to the blade region and serves also to guide the liner into the replaceable blade that is exposed and recessed at the vertex of the angle formed by the housing.