69results about How to "Increase the effective diameter" patented technology

An expanding reamer for reaming or cutting a concave surface, for example, for reaming an acetabulum in preparation for implanting a prosthetic component, such as an acetabular cup or socket, during a hip arthroplasty. The reamer includes a rotating shaft cooperating with a surgical drill or other power source at one end and rotating a reamer head at the other end, and a system adapted to expand one or more blades on the reamer head. In a preferred version, the reamer head comprises a plurality of generally circular, preferably substantially flat and parallel blades, the outer blades of which are radially expandable as segments of a cutting sphere to enlarge the effective diameter of the reamer head. A transverse blade may guide expansion of the blades to move upwards as well as outward to maintain a nearly perfect cutting sphere across a range of diameters. Upon rotation of the reamer head, the blades form a portion of an effective cutting sphere that is preferably greater-than-180-degrees in order to allow greater flexibility in placement of the shaft of the reamer relative to the surface being reamed, for example, relative to the center of axis of the acetabulum.

A method for treating the lung during an acute episode of reversible chronic obstructive pulmonary disease such as an asthma attack. The method comprises transferring energy to an airway wall of an airway such that a diameter of the airway is increased. The energy may be transferred to the airway wall prior to, during or after an asthma attack. The energy may be transferred in an amount sufficient to temporarily or permanently increase the diameter of the airway. The method may be performed while the airway is open, closed or partially closed.

An endodontic instrument and method for making same is provided. A rod of superelastic material is set into a shaped configuration to form an instrument, such that the instrument may be inserted into a root canal in a configuration different than the shaped configuration and revert towards its shaped configuration during the endodontic procedure.

A vascular access device includes an antimicrobial coating that provides kink resistance to a catheter. The antimicrobial coating can extend along a length of the catheter to provide antimicrobial protection when the catheter is inserted into the patient's vasculature. The antimicrobial coating can also increase the effective diameter of the catheter to minimize the likelihood that the catheter will become kinked.

A two-wheel electric vehicle with ringlike, large, powered parallel wheels, in which at least one ringlike wheel is driven by a large toroidal electric motor. The fully circular rotor of the large toroidal electric motor is integrated with the hub of the ringlike wheel, while the circular or semi-circular toroidal stator is joined to the body of the two-wheel electric vehicle, the ringlike wheel and the toroidal electric motor having a common bearing. The electric power source to drive the toroidal electric motor is located near the ground-facing portion of the vehicle body. An opening is formed in the internal circular area of the toroidal stator, to allow the entry and exit of the passengers of the vehicle. A similar small vehicle with parallel, coaxial wheels allows the occupant of the small vehicle to travel, seated either facing the conventional front or the rear of the small vehicle.

A zoom lens includes, in order from an object side to an image side, a first lens unit of positive refractive power, a second lens unit of negative refractive power arranged to move during variation of magnification, a third lens unit arranged to compensate for shift of an image plane due to the variation of magnification, and a fourth lens unit of positive refractive power, wherein the fourth lens unit has a first lens subunit of negative refractive power, and an image is displaced by moving the first lens subunit in such a way as to have a component perpendicular to an optical axis of the zoom lens.

The invention relates to a small-diameter tubular pump pump-passing depth checking perforating and pumping combined production method. The method includes adopting a perforating and pumping combined pump and a small-diameter gamma depth checking gauge, tripping in a standing valve along with a perforating and pumping combined tubing string and a pumping-down tool to a design position, tripping in the small-diameter gamma depth checking gauge for pump-passing depth checking, adjusting the tubing string to enable a perforating gun to align to a perforating formation, tripping in a pumping rod plunger and a blanking plug, performing pump bumping and well completion, then performing annulus pressure perforating, and starting to pump and produce after perforating. By the technology, the purposes for accurate located perforating of oil sheets and pumping after perforating are achieved, oil layers are protected effectively, well control safety in construction is improved, and technical support is provided for well-killing-free production of high-pressure oil wells and high-gas-oil-ratio oil wells.

To provide a remote control system which is operable by using a portable terminal only when a person is present near a vehicle.The remote control system is formed of a receiving means for receiving a door locking request signal or a door unlocking request signal, a door locking mechanism, a signal determining means for determining whether a signal received by the receiving means is the door locking request signal or the door unlocking request signal, a locking instructing means for transmitting a locking instruction signal to the locking mechanism, an unlocking instructing means for transmitting an unlocking instruction signal to the locking mechanism, and a person checking means for checking whether or not a person is present near the vehicle, and transmitting a person confirmation signal to the unlocking instructing means. If the signal determining means determines that the signal received by the receiving means is the door locking request signal, the locking instructing means transmits the locking instruction signal to the locking mechanism. If the signal determining means determines that the signal received by the receiving means is the door unlocking request signal, the unlocking instructing means transmits the unlocking instruction signal to the locking mechanism on condition that the locking mechanism receives the person confirmation signal in a predetermined time period.

A tool is provided for preventing the rotation of a downhole tool or rotary pump stator, the tool comprising a tubular housing and a jaw which is biased radially outwardly from the tool to engage the casing wall for arresting tool rotation and providing significant stabilization of a rotary pump. In doing so, the tool housing moves oppositely to rest against the casing opposite the jaw. The tool housing and the downhole tool are thereby restrained and stabilized by the casing wall. The tool's jaw is released by opposite tool rotation. Preferably, the jaw is biased outwardly from the tool housing to a casing-engaging position by a torsional member, housed along the axis of the hinge of the jaw. The tool is released from the casing by opposite tool rotation which increasingly compresses the jaw toward the housing, twisting the torsional member into torsion, which then acts to urge the jaw outwardly again. Overextension of the jaw during assembly is prevented using cooperating stops in the jaw and the housing.

A concrete finishing apparatus and method for smoothing and flattening partially set-up concrete to a close-tolerance surface includes a movable unit that is movable and supported at a partially set-up concrete surface and at least one rotatable ring finishing member mounted to the movable unit. The rotatable ring finishing member is positioned at the concrete surface and rotatable to engage and finish the surface of the partially set-up concrete to a higher quality, closer-tolerance flat and level concrete floor surface. The apparatus may include a pair of rotatable ring finishing members that may be rotatable in opposite directions to enhance the floating and finishing processes and to transport any cement paste, sand, small aggregate, or concrete mix residue forward with the rotatable ring finishing members working surfaces to cut high areas and fill in any low areas as the concrete finishing apparatus moves over the partially set-up concrete.

A scanning-type image display devices includes: a light source; a scanning unit that scans light beams emitted from light source to display an image on a projection plane; and a control unit that controls the emission time of the light beam from the light source for each pixel of the image, and that also controls the emission time for each pixel depending on the scanning angle of the scanning unit.

An expanding reamer prepares an acetabulum for a prosthetic component during hip arthroplasty. One or more blades expand in directions non-parallel to the plane of the respective blades and form an effective cutting sphere preferably greater-than-180-degrees for greater flexibility in placement of the reamer shaft relative to the center of axis of the acetabulum. Two parallel blades may move out away from each other and from the reamer rotational axis, staying parallel to each other to become more distanced, but still parallel, segments of a larger cuffing sphere. Or, two blades may start generally parallel to each other and to the rotational axis of the device, but pivot out from each other in directions generally perpendicular to their respective blade planes, again becoming more distanced, but not parallel, segments of a larger cuffing sphere.

A device for manufacturing a frusto-conical shaped meat product by means of a mold casing that receives ground meat under pressure. The mold casing has an inner wall, a first lateral end, and a second lateral end. The mold casing has a frusto-conical shape, for forming the meat product into a desired shape and cross section. An end fitting is secured to the discharge end of a meat stuffer. The end fitting includes a plurality of pivotable, flexible, adjacent, partially overlapping fins. The fins pivot as they are moved relative to the mold casing, and in that way maintain contact with the inner wall of the mold casing.

A cryoprobe for surgical and other treatments. The cryoprobe comprises an expandable section that performs displacement of a distal cryotip forwards when there is elevation of the operation pressure in the interior of the cryoprobe. Needle-wise metal elements are installed on the external side of the cryotip. These needle-wise elements are deflecting outwards by a deflecting member fastened on the distal edge of an external shaft of the cryoprobe. This allows a significant enlargement of the frozen volume of the treated tissue with the same operation temperature and the outer diameter of the cryoprobe. In another embodiment, the needle elements are formed in a displaceable metal sheath and a distal section of a cryotip and / or special protrusions on this distal section act as the deflecting member.

A treat dispensing pet toy comprises a hub assembly having first and second hubs and an axle interconnecting the hubs. A barrel is mounted over the axle and is disposed between the hubs. The barrel has an interior chamber to hold treats. A treat dispensing opening is formed on the barrel and communicates with the interior chamber. When the pet toy is contacted with sufficient force, the hub assembly and barrel independently rotate thereby establishing a rotational differential. Treats fall through or are otherwise ejected from the opening in the barrel. According to a method of dispensing treats, the barrel and hub assembly independently rotate at different rotational speeds to affect the rate of dispensing treats.

Natural orifice transenteric surgical methods and devices for placing a band or other appliance around a hollow bodily organ such as the stomach. In one alternative embodiment, such a band is placed in order to reduce the inner volume of the stomach.

Wind turbine comprising a rotor and a generator, said rotor comprising a rotor hub and one or more rotor blades and said generator comprising a generator stator and a generator rotor, wherein the hub is rotatably mounted on a frame, the generator rotor comprises a carrying structure carrying magnetic or electromagnetic elements, one or more circumferentially arranged substantially axial protrusions are attached to said rotor, wherein said axial protrusions extend into the generator rotor carrying structure, and one or more flexible couplings are arranged between one or more of said axial protrusions and said carrying structure.

A self-retaining screwdriver includes an elongate inner driver rod and an outer sleeve disposed about the inner driver rod and having a distal end, the distal end having a plurality of fingers. Each of the fingers includes a retention feature. The retention feature may be formed as an area of thickening of the finger, whereby an effective diameter of the outer sleeve at the retention features of the fingers is increased. When the inner driver rod is disposed within the outer sleeve with a distal portion of the inner driver rod extended as far as the retention feature, the presence of the inner driver rod prevents the fingers from being radially displaced inwardly. When the inner driver rod is at least partially withdrawn, the distal portion of the inner driver rod does not extend to a distal end of the fingers, and the fingers can be radially displaced inwardly.

Industry regulatory organizations have created performance restrictions for ball bats. The present invention relates to a ball bat with an internal impact dampening means. More particularly, the present invention relates to a ball bat with a handle, a barrel, and a central tube positioned coaxially within the barrel. The central tube includes at least one restriction member capable of limiting the deformation experienced by the ball bat upon impact of a ball. Precisely limiting the deformation of the ball bat allows the present invention to achieve, but not exceed, performance substantially equal to the maximum performance allowed by industry regulatory organizations and maintain that level of performance over a substantial length of the ball bat.

The invention relates to a spiral soil squeezing recompaction cast-in-place concrete pile, a pile forming drill bit and a construction method. According to the adopted technical scheme, the spiral soil squeezing recompaction cast-in-place concrete pile comprises a primary soil squeezing pile section and a plurality of recompaction sections, the primary soil squeezing pile section is a concrete pile I, concrete piles II arranged inside the recompaction sections, the outer diameter of the concrete piles II is larger than that of the concrete pile I, the concrete piles II are wrapped by a recompaction layer formed by mixing rock soil and concrete, and the concrete pile I and the concrete piles II are of an integrated structure. The spiral soil squeezing recompaction cast-in-place concrete pile can carry out strengthened compaction on a rock soil layer with the large compressibility in the pile depth range, the pile bearing capacity is further improved, and energy conservation and emissionreduction are achieved.

A dowel bar spring clip may include a central torsion spring portion having leg extensions. The leg extensions may be configured to releasably engage a dowel bar basket. The torsion spring portion may be configured to securely encompass a dowel bar, such that the dowel bar is secured to the dowel bar basket by the clip. The dowel bar spring clip may be removable, for example to replace or reposition the dowel bar relative to the basket.

It includes: a first lens having a convex shape on an object side and having positive refractive power; a second lens having a concave shape on an image plane side and having negative refractive power; a third lens having, in a paraxial region, one of a biconvex shape and a plano-convex shape that is provided with a convex surface facing toward the image plane side, the third lens having positive refractive power; a fourth lens having aspherical shapes on both surfaces thereof and having negative refractive power; and a fifth lens having aspherical shapes on both surfaces thereof, having a concave shape in a paraxial region on the image plane side, and having negative refractive power, the first to fifth lenses being arranged in order from the object side. The following conditional expressions are satisfied, where ν2 is an Abbe number of the second lens, and ν4 is an Abbe number of the fourth lens.ν2<30  (1)ν4<30  (2)

The invention discloses a low-confining-pressure perforator used for an oil gas well. The low-confining-pressure perforator comprises a gun body, a gun carrier pipe and perforating bullets, and is characterized in that the gun body is in a hollow tubular shape, the perforating bullets are evenly arranged on the gun carrier pipe at intervals in the axial direction, the gun carrier pipe is sleeved with the gun body, blind holes are formed in the positions, opposite to the perforating bullets, of the outer surface of the gun body, and the two ends of the gun body are provided with a connector and a gun breech respectively so that the gun carrier pipe and the perforating bullets can be blocked in the gun body. The low-confining-pressure perforator is high in structural strength and toughness, the gun body can be effectively prevented from fractures caused by explosions when the perforating work is conducted under the low-confining-pressure condition, the energy loss is reduced through the structures of the arc-shaped blind holes when jet flow penetrates through the blind holes, the effective diameter of perforated holes is increased, the detonation wave energy can be more rapidly released out of the perforated holes, the impact effect of the detonation wave energy on the gun body is reduced, and the perforation completion effect is ensured.

A non-impact keyless chuck suitable for use with manual or powered drivers is disclosed. The chuck comprises a body which carries a rotatable split nut having a relatively fine thread and a plurality of slidable jaws, which may be identical, driven by the rotatable nut. An anti-friction bearing is disposed between the rotatable nut and a bearing thrust ring mounted on the body. A clutch or torque limiting mechanism is provided to limit the tightening torque to a predetermined value while the loosening torque may be limited or unlimited. The front sleeve, and rear sleeve, if used, may be formed from a structural plastic to reduce manufacturing costs. A relatively soft elastomeric grip boot may be placed on the front sleeve to improve the grip and temporarily restrain and center the tool during chuck tightening or loosening operations. A relatively soft elastomeric grip boot may also be placed on the rear sleeve, if used.