82results about How to "Limit angle" patented technology

An electric drive attachment for a wheelchair comprising a drive housing containing an electric motor, a drive wheel which touches the ground and drives the wheelchair through frictional contact with the ground and speed reducing mechanism between the motor and drive wheel, attachment structure to attach the wheelchair drive unit to the wheelchair as a pair of clamps one on each side of the frame. Also included are torque dampening systems to reduce the shock of starting the motor, a clutch which enables manual forward movement of a wheelchair without engagement of the motor and without dragging of the drive wheel, an under run wheel and positive pressurization of the gear works and area surrounding the drive wheel to keep the housing free of debris.

A focal position determining method determines a focal position of an objective lens focused on an observed target region in a specimen. The focal position determining method includes measuring any one of the focal position of the objective lens at a near point and the focal position of the objective lens at a far point or both so as to determine the focal position of the objective lens focused on the observed target region based on the measured focal position.

An additive processing method is used to produce a customized eyewear lens by selectively building layers of radiation-polymerized material onto a lens substrate that has optical power properties discernibly different from the optical properties of the customized eyewear lens. The method involves obtaining the lens substrate, calculating the modifications needed to convert the lens substrate's properties to the desired set of properties of the customized lens, generating an additive layer design to achieve the calculated modifications, and identifying at least one control point for confirmation or revision of the additive layer design. The method further involves applying liquid layers of radiation-polymerizable material to the lens substrate and irradiating the liquid layers in selected areas with controlled radiation such that the material is only polymerized and the additive layer is only formed in the select areas irradiated, according to the additive layer design.

This invention generally relates to optical devices that can collect and detect signal emissions effectively while allowing the excitation light path and the sample flow path to coexist non-obstructively in a compact format. More specifically, this invention relates to a compact device having a multilayer coating on the structure surface and a wave guiding structure. In the device, using the surface plasmon coupling effect, the majority of the optical emission from the emitter on top of the multilayer coating is distributed toward the wave guiding structure. The wave guiding structure then further directs on signal to the detector with a high efficiency.

An image pickup lens includes a first lens having a positive refractive power with a convex surface facing the object side, a second lens having a negative refractive power with a concave surface facing the image side, a third lens having a positive refractive power with a convex surface facing the object side, a fourth lens having both sides formed as aspheric surfaces and having a negative refractive power with a concave surface facing the image side, and a fifth lens having both sides formed as aspheric surfaces and having a positive refractive power with a concave surface facing the image side, wherein the first lens and the second lens satisfy following conditional expressions (1), (2) and (3);

45<ν1<90  (1)

22<ν2<35  (2)

2.0<ν1/ν2<2.6  (3)

where ν1 represents an Abbe number of the first lens, and ν2 represents an Abbe number of the second lens.

A plaque tack can be used for holding plaque against blood vessel walls such as in treating atherosclerotic occlusive disease. The plaque tack can be formed as a thin, annular band for holding loose plaque under a spring or other expansion force against a blood vessel wall. Focal elevating elements and/or other features, such as anchors, can be used to exert a holding force on a plaque position while minimizing the amount of material surface area in contact with the plaque or blood vessel wall and reducing the potential of friction with the endoluminal surface. This approach offers clinicians the ability to perform a minimally invasive post-angioplasty treatment and produce a stent-like result without using a stent.

A plaque tack can be used for holding plaque against blood vessel walls such as in treating atherosclerotic occlusive disease. The plaque tack can be formed as a thin, annular band for holding loose plaque under a spring or other expansion force against a blood vessel wall. Focal elevating elements and/or other features, such as anchors, can be used to exert a holding force on a plaque position while minimizing the amount of material surface area in contact with the plaque or blood vessel wall and reducing the potential of friction with the endoluminal surface. This approach offers clinicians the ability to perform a minimally invasive post-angioplasty treatment and produce a stent-like result without using a stent.

A fin-type compound parabolic concentrator includes a pair of semi-parabolic reflectors arranged on opposite sides of a common plane, the reflectors having a common focal point on the plane and being rotated through an angle defined by a line extending from the apex of each reflector through the focal point. A generally arcuate bottom reflector having a center line within the common plane is connected with the semi-parabolic reflectors. A bi-facial photovoltaic absorber is arranged in the common plane and extends from the focal point to the bottom reflector for absorbing rays of sunlight directed thereon from the reflectors. The absorber has a critical angle below which rays directed thereon will be substantially absorbed and above which rays directed thereon will be substantially reflected and the bottom reflector is configured to limit the angle of rays that strike said absorber to less than said critical angle.

A vehicle seat is provided, in particular motor vehicle seat, including a seat part (3) and a backrest (4) which are connected by recliner fittings (5) that are connected together by a shaft (7) connected to a hand lever (9) for unlocking each recliner fitting to adjust an angle of the backrest relative to the seat base The fitting has a first fitting part (11) and a second fitting part (12) mounted to be rotatable relative to each other about an axis of rotation. The second fitting part has inwardly facing toothing which extends along at least a portion of an arc. A locking device with a driving element 27 is connected to the shaft and locking elements movable in response to rotation of the shaft, each of the locking elements having a radial outward side with at least one tooth for engaging the toothing of the second fitting part when the locking element is in a locking position, one of the first fitting part and the second fitting part having an outer surface defining a recess having a recess surface with an end surface (38). A clip element (40, 70) is connected to the driving element (27) and a handle load element (50, 80) is fixed to the shaft (7) and is connected to the clip element (40, 70). The handle load element (50, 80) extends radially outward from the shaft (7) and includes a cam arrangement (52) forming a stop with the end surface (38) to limit movement of the cam arrangement (52) and to prevent a transfer of high loads from the hand lever to the locking device.

A plaque tack can be used for holding plaque against blood vessel walls such as in treating atherosclerotic occlusive disease. The plaque tack can be formed as a thin, annular band for holding loose plaque under a spring or other expansion force against a blood vessel wall. Focal elevating elements and/or other features, such as anchors, can be used to exert a holding force on a plaque position while minimizing the amount of material surface area in contact with the plaque or blood vessel wall and reducing the potential of friction with the endoluminal surface. This approach offers clinicians the ability to perform a minimally invasive post-angioplasty treatment and produce a stent-like result without using a stent.

A first device coupled with a first display and an image sensor receives output data from a second device having a second display different from the first display. The output data represents content displayable by the second device on the second display. The first device determines, using the image sensor, a position of the second display relative to the first device and causes the first display to display content based on the output data received from the second device and the determined position of the second display relative to the first device.

A joint brick for a building block is pivotally connected between the building blocks to work as a joint of the limbs. The joint brick includes two side plates and two axial post disposed between the side plates to be pivotally connected with engaging recesses of other building blocks. When the axial posts disposed at a top end and a bottom end of the joint brick are pivotally connected with other building blocks, the limbs can substantially swing, extend and bend relative to each other to make playing the building blocks more convenient and more interesting.

A top support structure of a tent frame includes a top pivot holder (1), to which a plurality of support poles (10) are pivotally coupled. An elastic member (9) is provided between each support pole and the pivot holder. The elastic member folds and stores elasticity energy when the tent frame is folded and automatically springs the support poles when the elasticity energy is released. A control holder (2) is pivotally coupled to the bottom of the pivot holder, and the control holder has lock pieces (211) which can prop the support poles up to limit their rotation and release grooves (212) adjacent to the lock pieces which can release the limitation. On the top of pivot grooves (12) of the pivot holder are provided with position-limited devices (D) to prevent the support poles from rotating upwards.

A method for fabricating a semiconductor laser device, by etching facets using a photoelectrochemical (PEC) etch, so that the facets are sufficiently smooth to support optical modes within a cavity bounded by the facets.

This invention generally relates to optical devices that can collect and detect signal emissions effectively while allowing the excitation light path and the sample flow path to coexist non-obstructively in a compact format. The device has various embodiments, such as an embodiment including a plurality of reporters disposed on a sensing surface, wherein each one of the plurality of reporters is configured to react with a least one target analyte, a hyperspectral detection module configured to capture hyperspectral image data corresponding to the plurality of reporters, and a controller. The controller is configured to receive the hyperspectral image data from the hyperspectral detection module and generate a temporal spectral signature corresponding to each one of the plurality of reporters from the received hyperspectral image data.