Reciprocal motion type compressor having a piston in which strength is increased
AssigneeSanden Corporation
InventorsKiyoshi Miyazawa, Yujiro Morita
Life of this patent
Estimating the term…
Abstract
There is provided a reciprocal motion type compressor which has a piston reciprocally movable in a cylinder. The piston has a piston cover and a piston body portion. The piston cover has an insertion portion engaged with the piston body portion. The insertion portion has a sectional shape which becomes smaller gradually from the cover portion toward an end surface of the insertion portion. This structure provides an increased tensile strength of the piston.
Claims9
A reciprocal motion type compressor comprising a cylinder block defining a cylinder bore extending in an axial direction of the compressor, a piston placed in said cylinder bore and movable in said axial direction, and driving means for reciprocally driving said piston in said axial direction, said piston comprising:
- a body member having a front portion and a rear portion which are opposite to each other in said axial direction, said front portion being coupled to said driving means, said rear portion having a rear surface and a hollow portion extending from said rear surface in said axial direction;
- and
- a cover member coupled to said rear portion of said body member to close said hollow portion, said cover member comprising a solid plate portion fixed to said rear surface of said body member in said axial direction and a flange formed integral with said plate portion and inserted into said hollow portion of said body member for reinforcing said plate portion.
A reciprocal motion type compressor comprising a piston reciprocally movable in a cylinder bore, wherein said piston has a solid cover member and a body member fixed to each other, said body member having a rear surface and a hollow portion extending from said rear surface in an axial direction, said cover member having an insertion portion engaged with a rear section of said body member, said insertion portion being substantially closely fitted into said hollow portion so as to close said hollow portion, said insertion portion having a sectional area becoming smaller gradually from a rear end of said insertion portion towards a front end thereof.
A reciprocal motion type compressor comprising a cylinder block defining a cylinder bore extending in an axial direction of the compressor, a piston placed in said cylinder bore and movable in said axial direction, and driving means for reciprocally driving said piston in said axial direction, said piston comprising:
- a body member having a front portion and a rear portion which are opposite to each other in said axial direction, said front portion being coupled to said driving means, said rear portion having a rear surface and a hollow portion extending from said rear surface in said axial direction;
- and
- a solid cover member coupled to said rear portion of said body member and comprising a fitting portion substantially closely fitted into said hollow portion of said body member to close said hollow portion, said fitting portion comprising a front section having a first sectional area and a rear section having a second sectional area which is greater than said first sectional area.
Dependencies are inferred from the claim text.