Abstract: A useful sealing device which serves to fluidtightly seal a clearance between a cylindrical member and a cylindrical bore into which said cylindrical member is to be fitted. The sealing device comprises an annular endless resilient seal ring made of a resilient sheet-like material and having an inner diameter smaller than an outer diameter of a seal fitting portion on the cylindrical member. One of the opposite surfaces of the resilient seal ring is tightly fitted around the fitting portion of the cylindrical member in a facing relation to each other, whereas the other surface of the same is faced to the sealing surface of the cylindrical bore and at least a part thereof is placed in resilient contact with the sealing surface.

Abstract: A method of assembling a reciprocating compressor, in which a piston for partitioning a cylinder into a compression chamber and a suction chamber is telescoped in the cylinder, a closure end plate is secured at an open end of the cylinder, the end surface of the piston and the bottom surface of the end plate define opposing sides of the compression chamber, the piston is perforated by a suction port for communicating between the compression chamber and the suction chamber, and a suction valve sits on the piston for opening and closing the suction port, comprising the following steps; (1) manufacturing in advance a plurality of closure end plate, the i-th end plate having a bottom surface formed by a projection of different height h.sub.i ; (2) defining two reference positions of the piston and cylinder, respectively, for the i-th compressor and measuring the interval D.sub.i between the reference positions; (3) selecting an end plate which has a projection of such a height that D.sub.i -h.sub.