1075results about "Counterweights" patented technology

In a window covering system with a shade roll, a counterbalanced motorized shade roll system includes a shade roll with a hollow interior connected with a window covering system. A motor is located within the hollow interior. A torsion spring is also located within the hollow interior of the shade roll and the torsion spring is connected with the motor on one end and with the hollow interior on another end. Batteries are also located within the hollow interior of the shade roll opposite from the motor and after the connection of the torsion spring with the hollow interior of the shade roll such that the torsion spring does not surround the batteries.

A storm protector (20) to be attachable over a window (21) or other opening of a building (22) includes a header (26), a bottom sill (25) and side frames (23, 24) extending between the ends of the header (26) and the sill (25). The header (26) carries a tube (53) which has one end of a curtain assembly (27) attached thereto. The curtain assembly (27)is biased by a spring (54) to be normally coiled on the tube (53), but the curtain assembly (27) may be manually moved along the frames (23, 24) to the sill (25) to cover the window opening (21). A bar (31) is formed at the other end of the curtain assembly (27), and the bar (31) carries a guide and lock assembly (110) which rides in and can engage at least one of the side frames (23, 24) to guide and selectively hold the curtain assembly (27) at any selected position along the side frames (23, 24). A tensioning assembly (32) is positioned in the header (26) and, without disassembling the protector (20), it may be accessed to adjust the tension of the spring (54). The header (26) includes a sealing surface (50), the sill (25) includes a sealing surface (105) and each side frame (23, 24) includes a sealing surface (89). A force upon the curtain assembly (27) causes it to engage the sealing surfaces (50, 89, 105) to provide a full perimeter seal around the window opening (21).

The invention provides a balancing and positioning system for a workpiece platform of a photoetching machine, which comprises a photoetching machine frame, a pedestal, a first compensation module, a first balancing mass block, two second compensation modules, a second balancing mass block, two second motor stators, two second motor rotors, a first motor stator and at least one force moment eliminator which is arranged on the side edge of the pedestal. The balancing and positioning system eliminates the reaction force moment of an exposure platform generated under the condition of acceleration through the force moment eliminator, and greatly reduces the impact force on the pedestal when the workpiece platform system carries loads under the condition of acceleration.

The invention includes an unbalanced horizontal blind with a spring means to provide a lifting or retraction force for the slats of the blinds. A brake means prevents undesired movement of the slats that would otherwise result from the continuous retraction force of the spring means when the slats are set in a desired position. Controls for the release of the brake means and tilting are also provided in an embodiment of a blind of the invention. An embodiment of the invention permits the blind to be operated by a single wand that can be used to either raise the slats or tilt the slats. This eliminates the need for a loose cord or bead chain that would traditionally be used as the user interface for controlling the movement of the slats of the blind.

A counter-balance apparatus and method, including configurable weights, suspensions, and supports, upon which an external force can be exerted, and as a result, will react as a counter-balance to said external force as a means to provide force resistance and stability; wherein the construct may be encapsulated, varied in materials, size, and substance, enabling said counter-balance with a predictable and known effect to be produced at scale, readily installed, moved, or manipulated, to address a plethora of stabilization applications, and which further comprises fastener(s) and / or band(s) to secure it to immobile, mobile, or in-motion objects, and computational and communications capabilities to dynamically adjust to external factors.

A pleated shade assembly capable of height adjustment without use of pull cords, comprising an upper elongated support; a lower elongated member that is manually adjustable up and down; primary lines extending through shade pleats to suspend the bottom elongated member; primary rotors at the top elongated support to entrain the primary lines; at least one secondary line having operative connection to the primary lines; and apparatus acting on the secondary line or lines for counterbalancing suspension force exerted on the primary lines at different shade height adjusted levels including dual rotary members exerting tensioning force on said secondary line or lines, and including a spring coupled to the dual rotary members exerting force tending to entrain the secondary line or lines about the dual rotary members, for storage on at least one of the members.

A roller shade is provided. The roller shade may include: a roller; an axle located in the roller; an adjustable counterbalancing mechanism configured to counter balance a rotation of the roller wherein the counterbalancing mechanism is configured to impart a rotational force on the roller and the rotational force is adjusted by rotating the axle; and a locking mechanism attached to the roller and configured to lock the axle at a given angular orientation, wherein the locking mechanism includes a shear pin. A method of tensioning a counterbalancing mechanism may also be provided. The method may include: mounting the counterbalancing mechanism to a shaft; mounting the lock wheel to the shaft; turning the shaft to tension the counterbalancing mechanism; and inserting a shear pin into a hole in the lock wheel to lock the shaft in place.

A braking device configured for use with the counterbalancing system of a garage door. The braking device includes a support bracket, a ratchet wheel, a pawl arm, and a biasing spring. The support bracket is rigidly connected to a fixed structure and has a guiding slot. The ratchet wheel is securely mounted about the overhead shaft of the counterbalancing system and has at least one notch. The pawl arm has first and second ends, the first end of the pawl arm being pivotally connected to the support bracket and the second end of the pawl arm cooperating with the guiding slot and being movable with respect to the support bracket along said guiding slot. The first and second ends of the pawl arm are further connected to flanges of a plug on either side of the overhead shaft. The biasing spring is operatively connected between the support bracket and the pawl arm so as to exert a biasing force for biasing the pawl arm towards the ratchet wheel. The pawl arm is devised so that, an element thereof is adjacent to the ratchet wheel, said element being shaped and sized to be removably insertable into at least one notch of the ratchet wheel so as to block rotation of the ratchet wheel, and thus block rotation of the overhead shaft, in the event of a failure of the counterbalancing system of the door.

The invention discloses a processing method of multiple eccentric shaft; lengthened ends are arranged on both ends of the multiple eccentric shaft; after that a counterbalance is arranged at the position of eccentric crosspiece, and a reference crosspiece is processed, then counterbalance is dismounted; a eccentric sleeve is arranged at the lengthened end, and an eccentric crosspiece is processed; finally the lengthened end of the multiple eccentric shaft is removed, and a multiple eccentric shaft is obtained. The invention also discloses the counterbalance use in the method, comprising a balance section and a fixation section; the balance section and the fixation section can clasp the eccentric crosspiece after being installed. The invention also disclosed the eccentric sleeve use in the method, comprising a lengthened end hole and a processing hole; the axial line of the lengthened end hole is in parallel with the axial line of the processing hole, the eccentric crosspiece is processed by taking the axial line of the eccentric crosspiece as the processing axial line. The counterbalance and the eccentric sleeve provided by the invention has simple structure, and is easy to make; and relative high precision can be easily achieved; the processing method of the multiple eccentric shaft of the invention has simple steps, and the multiple eccentric shaft with relative high precision can be made with convenience and rapidness.

The present invention relates to a reduction device for a roll screen, as a compressive piston of a reduction part comes in and out inside of a cylinder combined with a one end of inside of a winding bar, to a device being capable of winding and loosening the roll screen easily and conveniently, more particularly to a device being capable of preventing a noise, an impact and a safety-accident and being capable of operating easily without distinction of age or sex, young and old, men and women all alike, due to a winding of the roll screen by way of reducing a speed of the roll screen with a definite section while the roll screen is wound.

A motorized window treatment may provide a low-cost solution for controlling the amount of daylight entering a space through a window. The window treatment may include a covering material (e.g., a cellular shade fabric or a roller shade fabric), a drive assembly for raising and lowering the covering material, and a motor drive unit including a motor configured to drive the drive assembly to raise and lower the covering material. The motorized window treatment may comprise one or more battery packs configured to receive batteries for powering the motor drive unit. The batteries may be located out of view of a user of the motorized window treatment (e.g., in a headrail or in a battery compartment). The motorized window treatment may use various power-saving methods to lengthen the lifetime of the batteries, e.g., to reduce the motor speed to conserve additional battery power and extend the lifetime of the batteries.

Constant balance of a varying load, particularly a window shade or blind, is maintained by providing a lifting force, preferably from a spring, through a mediating mechanism comprising a variable pitch screw assembly, such that the mechanical advantage of the mediating mechanism changes to allow the continuously decreasing spring force to apply an appropriate lifting force at all times. A variable pitch screw thread is formed as grooves in a cylindrical blank. The grooves are engaged by pins in a nut which thereby accomodates the variable pitch of the screw. A compact blind tilting mechanism is also incorporated. The capacity of the mechanism can be increased by linking several screw assemblies.

A motorized window treatment provides a low-cost solution for controlling the amount of daylight entering a space through a window. The window treatment includes a covering material, a drive shaft, at least one lift cord rotatably received around the drive shaft and connected to the covering material, and a motor coupled to the drive shaft for raising and lowering the covering material. The window treatment also includes a spring assist unit for assisting the motor by providing a torque that equals the torque provided by the weight on the cords that lift the covering material at a position midway between fully-open and fully-closed positions, which helps to minimize motor usage and conserve battery life if a battery is used to power the motorized window treatment. The window treatment may comprise a photosensor for measuring the amount of daylight outside the window and temperature sensors for measuring the temperatures inside and outside of the window. The position of the covering material may be automatically controlled in response to the photosensor and the temperature sensors to save energy, or may also be controlled in response to an infrared or radio-frequency remote control.

A reciprocating shaft assembly in a reciprocating saw moves in a reciprocal motion and drives a saw blade via a blade holder. At least one bore is formed in an end of the reciprocating shaft assembly opposite the blade holder. A pin fixed to the saw passes through the bore and acts as a bearing to support the reciprocating shaft assembly in its reciprocating motion.

A counterweight in a reciprocating saw counterbalances a reciprocating shaft assembly adapted to hold a saw blade. The counterweight is supported for reciprocating motion by slides which ride within slots formed in a housing adapted to hold the reciprocating mechanism.

The invention discloses an automatic leveling device and a leveling method of a high-precision upright air-floating rotary platform, belongs to the technical field of rotary platform leveling, and aims to solve the problem that the interference moment index of a rotary platform can be affected as the gravity center of an upright air-floating rotary platform rotating component deviates from a rotation axis. An effective load is fixedly connected with a load mounting disc of the device; an air-floating shaft is connected with the lower surface of the load mounting disc; the air-floating shaft is correspondingly arranged in the center of the upper surface of an air-floating rotary platform main body; the bottom surface of the air-floating rotary platform main body is fixedly connected with an air-floating rotary platform base; the air-floating rotary platform base is supported by using an air-floating rotary platform height adjusting support; an x-axis leveling motor and a y-axis leveling motor are used for leveling the device by adjusting corresponding counterweight blocks. According to the leveling method, by adjusting one air-floating rotary platform height adjusting support, the corresponding position of the load mounting disc is the lowest point in a horizontal direction, a present rotary platform inclination angle can be measured, the straight line position of the present gravity center of the load mounting disc can be measured, and the moving distance of the counterweight block can be further obtained. The automatic leveling device and the leveling method are applied to automatic leveling of the rotary platform.

A high load operation industrial roll door, including a flexible door curtain windable about a top roll positioned above a door opening and provided with a drive system. The roll door includes a bottom beam fastened to the door curtain, and a biasing spring, for resisting movement of the door upon application of a load thereon, and a positive stop preventing movement of the biasing means beyond a predetermined point.

A variable pitch screw is manufactured by twisting a prepared blank to the desired shape. The blank varies along its length such that it naturally twists to the desired shape.

The present invention relates to a reduction device for a roll screen, as a compressive piston of a reduction part comes in and out inside of a cylinder combined with a one end of inside of a winding bar, to a device being capable of winding and loosening the roll screen easily and conveniently, more particularly to a device being capable of preventing a noise, an impact and a safety-accident and being capable of operating easily without distinction of age or sex, young and old, men and women all alike, due to a winding of the roll screen by way of reducing a speed of the roll screen with a definite section while the roll screen is wound.

A roller blind device including a fabric, which can be wound on a rotationally drivable fabric shaft that is mounted on a frame, and including a pull rod that is placed on the free edge of the fabric. Prior art roller blind devices reduce the window surface area. The aim of the invention is to further develop a prior art roller blind device in order to obtain a simple, inexpensive and compact design that reduces the incidence of light only minimally. To this end, the invention provides that a cord reel is connected to the fabric shaft in a rotationally fixed manner while being coaxial to said fabric shaft and located in the extension thereof, and the free end of the cord that can be wound on the reel is connected to the pull rod via a cord diverter. When the fabric is pulled from the fabric shaft, the cord is wound on the cord reel and vice versa. A spring device is provided over the course of the cord in order to adapt the cord to the varying winding state of the fabric shaft and cord reel.

The invention discloses a powdery metallurgy balance block for a crankshaft of a gasoline engine and a production method for the powdery metallurgy balance block. The powdery metallurgy balance block is characterized by comprising a powdery metallurgy semi-circular block and a powdery metallurgy crank, wherein a fixing hole at one end of a main shaft is formed at the connection position between the powdery metallurgy semi-circular block and the powdery metallurgy crank; a fixing hole of the crankshaft is formed on the end part of the powdery metallurgy crank; and a flat wall is formed on one side of an inner wall of the fixing hole at one end of the main shaft, and is pressed and sintered into a whole through powdery metallurgy. According to the powdery metallurgy balance block for the crankshaft of the gasoline engine and the production method for the powdery metallurgy balance block, the main shaft is fixed in an interference mode by inserting into the fixing hole which is additionally formed at one end of the main shaft, and powdery metallurgy mixed powder is pressed and sintered into a whole, so that equipment is simplified, production cost is reduced, and marketing promotion is facilitated.

The purpose of the invention is to provide a passive / active-selectable cantilever type dynamic vibration absorber, which comprises an overall base, a step motor, a gear shaft, baffles and a mass block, a driven gear is fixed on the gear shaft, a front bearing base, a rear bearing base and the step motor are fixed on the overall base, a front bearing and a rear bearing are respectively mounted on the front bearing base and the rear bearing base, the gear shaft passes through the front bearing base and the rear bearing base and is respectively fitted in the front bearing and the rear bearing, the driven gear is located between the front bearing base and the rear bearing base, the output end of the step motor is connected with a driving gear, the driving gear is engaged with the driven gear, the overall base is fixed between the two baffles, the gear shaft is provided with an external thread, the center of the mass block is provided with a hole, the wall of the hole is provided with an internal thread which is matched with the external thread of the gear shaft, and the mass block is mounted on the external thread of the gear shaft through the internal thread. The passive / active-selectable cantilever type dynamic vibration absorber is structurally simple and highly reliable and can better meet the requirement for vibration absorption under different conditions.

An apparatus for absorbing vibration of a compressor includes: an elastic body mounted at an outer surface of a compressor case and elastically deformed when vibration is generated at a compressor; and a mass body connected to the elastic body, resonating with the compressor, for absorbing vibration of the compressor. Accordingly, vibration of the compressor is reduced so that noise and reliability degradation of a component due to the vibration can be reduced.

The invention discloses a double-intelligent flexible beam device based on the driving and oscillating of a planetary reducer. The device comprises a flexible beam body part, an oscillation detection part and a drive control part; the flexible beam body part comprises double-flexible amount, one end of the double-flexible beam is a free end, and the other end is a fixed end; the fixing end of the double-flexible beam is fixed on an output shaft of the planetary reducer so that the planetary reducer can rotate in a horizontal plane; a piezoelectric sensor and a piezoelectric actuator are glued nearby the fixing end of the double-flexible beam, and a computer outputs a control signal to a servo motor and a piezoelectric actuator to be used for the rotary control in the horizontal plane of the double-flexible beam after the computer receives a vibration signal of the piezoelectric sensor.

The invention relates to a counterweight assembly, and a counterweight mechanism and a holder employing the same. The holder comprises a support main body (210) and a supporting table (246) connected to the support main body (210), the holder also comprises an installation rod (244) connected to the support main body (210) and the counterweight assembly (50) arranged on the installation rod in an adjustable manner, the supporting table (246) is connected to the installation rod (244), the counterweight assembly (50) comprises a connecting seat (51) connected to the supporting table (246), guiding members (52) arranged on the connecting seat (51), counterweights (58) connected to the guiding member (52), and connecting pieces (59) arranged on the counterweights (58), fixing portions (513) are formed on the connecting seat (51), the guiding members (52) are arranged on the fixing portions (513), the counterweights (58) are connected to the guiding members (52) via the connecting pieces (59), and the counterweights (58) can move along the guiding members (52) to adjust the center of gravity of the holder and the counterweight assembly.