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Abstract
According to OSHA, ladder falls account for over twenty thousand workplace injuries and as many as 36 deaths per year. Many people who use ladders in the home for painting, changing light bulbs, etc . . . describe feeling unbalanced, wobbly, and nervous, especially when standing on A-frame ladders. Many ladder falls occur simply because the user loses his balance on the higher steps. Adding a sturdy grip or rail to the ladder would help users maintain their balance. Users prone to vertigo or unbalance may derive more security from the existence of the safety grip. The invention comprises a sturdy bar attached to the frame of a ladder and extendable above the top of the ladder. The bar is extendable by means of two hollow tubes attached firmly to the frame of the ladder, through which both ends of the bar can slide. A locking mechanism enables the safety bar to be extendable to different heights above the ladder. The safety bar is made of a sturdy material such as metal, plastic, wood, or strong aluminum. This safety attachment can be adapted to all existing ladders currently in use.
Abstract
A load balance is adjusted to be appropriate even if shared loads of lifting jacks are fluctuated from an initial setting state caused by cumulative errors of suspending rods. It is a load balance adjusting method of the lifting jack when a lifting module is jacked up by the plural lifting jacks via the suspending rods. The shared loads of the lifting jacks jacking up the respective suspending rods coupled to the lifting module are detected. A height of the lifting jack is adjusted when a fluctuation relative to a setting shared load stored in advance exceeds a prescribed range, to thereby adjust to be the setting shared load.
Abstract
The invention discloses a transmission adjusting balance device for a dental molding powder mixing machine, and the transmission adjusting device includes a pulley that can be displaced for changing a belt of the pulley easily and gives a tuning effect to avoid the belt from being elastically exhausted or affecting the mixing performance. The invention also includes a level means for maintaining a balance on both sides of the mixing machine and keeping the performance of the mixing machine to achieve a balanced transmission effect. |
