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US 5,700,135 AGranted
Bellows cam plate pump
AssigneeNissan Motor Co., Ltd.
InventorsIwane Inokuchi, Shigeru Kamegaya, Toshikazu Oshidari, Atsuhiro Sakamoto
Life of this patent
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Abstract
A cam plate pump comprises a pressurizing chamber formed by a bellows which elongates and contracts along a center axis parallel to the input shaft of the pump. The cam plate rotates together with the input shaft, and compresses the bellows via a piston. A mechanism for guiding the piston along the center axis, and a mechanism for blocking the rotational torque acting on the bellows via the piston are provided. These mechanisms prevent a bending load or twisting load from acting on the bellows.
Claims12
A bellows cam plate pump comprising
- an input shaft,
- a pressurizing chamber formed by a bellows that elongates and contracts along a center axis parallel to said input shaft,
- a cam plate fixed at an inclination to said input shaft,
- an inlet port for supplying fluid to said pressurizing chamber according to an expansion of said chamber,
- an outlet port for discharging fluid from said pressurizing chamber according to a contraction of said chamber,
- a piston for compressing said bellows by a displacement according to a rotation of said cam plate, said piston including a depression for accommodating one end of said bellows, and
- a cylindrical means displaced substantially coaxial with said bellows for guiding the displacement of said bellows along the center axis of said bellows.
4 more elements
Dependencies are inferred from the claim text.