Abstract: An impact-driven tool includes a cylinder and a piston slidably inserted into the cylinder and has a large-diameter portion. The cylinder includes: a chamber on one end side; a chamber on the other end side; a communication path that allows the chamber on one end side and the chamber on the other end side to communicate with each other; and a valve chamber that is continuous with one end side in the axial direction of the communication path, and a valve body for piston lifting control that is incorporated so as to be movable up and down and is provided in the valve chamber.

Abstract: The present invention provides novel crystal forms of arylalkylamine compounds. Specifically, the novel crystal forms of 4-(3S-(1R-(1-naphthyl)ethylamino)pyrrolidin-1-yl)phenylacetic acid have excellent stability and therefore are useful as pharmaceutical ingredients. The present invention also provides industrially advantageous processes for producing the arylalkylamine compounds.

Abstract: The present invention provides novel crystal forms of arylalkylamine compounds. Specifically, the novel crystal forms of 4-(3S-(1R-(1-naphthyl)ethylamino)pyrrolidin-1-yl)phenylacetic acid have excellent stability and therefore are useful as pharmaceutical ingredients. The present invention also provides industrially advantageous processes for producing the arylalkylamine compounds.

Abstract: The present invention provides crystal forms A and B of 4-(3S-(1R-(1-naphthyl)ethylamino)pyrrolidin-1-yl)phenylacetic acid having excellent stability and use as pharmaceutical ingredients. The present invention also provides industrially advantageous processes for producing these crystalline compounds.

Abstract: An impact-driven tool includes a cylinder and a piston slidably inserted into the cylinder and has a large-diameter portion. The cylinder includes: a chamber on one end side; a chamber on the other end side; a communication path that allows the chamber on one end side and the chamber on the other end side to communicate with each other; and a valve chamber that is continuous with one end side in the axial direction of the communication path, and a valve body for piston lifting control that is incorporated so as to be movable up and down and is provided in the valve chamber.

Abstract: The present invention provides novel crystal forms of arylalkylamine compounds. Specifically, the novel crystal forms of 4-(3S-(1R-(1-naphthyl)ethylamino)pyrrolidin-1-yl)phenylacetic acid have excellent stability and therefore are useful as pharmaceutical ingredients. The present invention also provides industrially advantageous processes for producing the arylalkylamine compounds.

Abstract: A valve includes an annular disc having an opening window and a passage that extends from an inner periphery or an outer periphery of the disc to the opening window, and an annular leaf valve that is laminated onto the disc in order to open and close the opening window. The passage is covered by the leaf valve so as to function as an orifice.

Abstract: A valve includes an annular disc having an opening window and a passage that extends from an inner periphery or an outer periphery of the disc to the opening window, and an annular leaf valve that is laminated onto the disc in order to open and close the opening window. The passage is covered by the leaf valve so as to function as an orifice.