Importance

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Abstract

A simple automatic opening and closing type of urination apparatus (10) comprises a cylinder (2), a pressure responsive plunger (3), a resilient member (4), a protective casing (5), and a lock mechanism (6). The cylinder (2) is provided in a front end with an inlet port (21), on a rear end with a cylinder flange (22), and in an outer peripheral wall of an intermediate portion with a plurality of outlet ports (23). The pressure responsive plunger (3) is slidably received in the cylinder (2) and provided on a front end with a liquid-sealing portion (31), on a rear end with a plunger flange (32), and on an intermediate portion with a plurality of ribs (33) which extend longitudinally and cross each other radially. At least one of the ribs (33) is provided with serrated teeth (331) which are aligned at a given pitch in a longitudinal direction. The resilient member (4) interconnects the cylinder flange (22) on the rear end of the cylinder (2) and the plunger flange (32) on the rear end of the plunger (3) to attract the ends to each other. The protective casing (5) is secured to the rear end of the cylinder (2) for permitting the pressure responsive plunger (3) to move in an axial direction. The lock mechanism (6) engages with and disengages from the serrated tooth (331) of the rib (33) of the plunger (3) to retain and release the axial movement of the plunger (3). The urine in a urinary bladder (12) is discharged from one of the outlet ports (23) in the cylinder (2) into a urine-collecting bag (14) outside of a patient's body when a pressure of urine in the urinary bladder reaches one of predetermined values. Each of the outlet ports (23) is set to correspond to each of the predetermined values of the pressure of urine in the urinary bladder (12) communicated with the inlet port of the cylinder (2).

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First Claim