Abstract: A method for manufacturing a shoe for use, in a swash-plate type compressor, which shoe is to be inserted between a swash-plate and a ball for transmitting the motive power of the swash-plate to the piston related, wherein (1) a base material from which the shoe is made, is composed of steel and is on one side provided with a concavity having an annular groove inside; (2) an annular material of copper or other like metal, free from seizure when pressed against steel is put in the concavity before a male die with a projection of semispherical surface configuration is pressed thereinto; and (3) the concavity in the base material will then be deformed into a desired approximately semispherical configuration, while the annular material is spread under pressure between the projection and the base material of the shoe to cover the surface of the concavity to form a spherically deformed concavity. Shoes made in this way are highly resistant to high-speed operation, heavy-load, and impact.

Abstract: A vehicle air conditioning compressor which is driven by e.g., the prime mover of the vehicle as required to cool the passenger compartment comprises a swash plate mounted on a rotatable shaft and a plurality of pistons, each being reciprocated by the rotating swash plate via a set of a ball and a shoe rotatably engaging with each other, wherein said compressor is provided for each piston with a shoe composed of a steel backing plate having a sintered porous layer integrally formed thereon of a powdered copper alloy comprising 2.5 - 12.1 wt.% Sn, 7.0 - 25.0 wt.% Pb and the balance being substantially copper, in a critical thickness ranging from 0.1 mm to 0.5 mm.