| 摘要 |
PCT No. PCT/GB93/01988 Sec. 371 Date Nov. 21, 1994 Sec. 102(e) Date Nov. 21, 1994 PCT Filed Sep. 22, 1993 PCT Pub. No. WO94/07111 PCT Pub. Date Mar. 31, 1994A volumetric water meter of the type having an eccentric piston oscillating in a cylindrical chamber has a drive peg (64) on the piston engaging a rotor arm (50) which rotates about the chamber axis to drive an external register or the like. The drive peg is offset from the piston axis by that amount necessary to compensate for the periodic variation in angular velocity of the piston. The likelihood of the peg becoming disengaged from the rotor arm is thus considerably reduced.
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