Abstract The present invention is concerned with improvements relating to hermetically sealed motor-compressor apparatus as used in the cooling systems of mechanical refrigerators. More particularly the invention relates to an improved reciprocating mechanism for linking or yoking a crankshaft to a compressor piston and according to the invention the cylindrical piston is provided with a protruding skirt having a crossmember to which is attached a tongue of appreciably less width than the piston. Through a bore in this tongue there passes a slide shaft which constitutes a yoke little end, the said tongue being secured to the slide shaft, e.g., by a pin. The tongue width is small and clearance is provided between the edges of the skirt and sidearms associated with the yoke big end and receiving the slide shaft so that one assembly as described may do service for a wide variety of piston member diameters.
In a hermetically sealed motor-compressor apparatus, a cylindrical piston having a protruding skirt with open end, a centrally located crossmember spanning and connected to said skirt open end, a tongue of appreciably less width than the diameter of the piston connected to and projecting from the crossmember and having a transverse bore, a slide shaft extending transversely of the longitudinal axis of the piston through the tongue bore and secured to the tongue against movement relative thereto, and a yoke having spaced apertured sidearms slidably receiving the slide shaft and having an aperture displaced from and having its axis at right angles to the axis of the sidearm apertures, adapted to receive a crankshaft eccentric pin extending perpendicularly to the longitudinal axis of the slide shaft, mechanical clearance being provided between the edges of the piston skirt and adjacent parts of the sidearms.
Claim 2
Dependent Claim
143 words
In a hermetically sealed motor-compressor apparatus, a cylindrical piston having a protruding skirt with open end, a centrally located crossmember spanning and connected to said skirt open end, a tongue of appreciably less width than the diameter of the piston connected to and projecting from the crossmember and having a transverse bore, a slide shaft extending transversely of the longitudinal axis of the piston through the tongue bore and secured to the tongue against movement relative thereto, and a yoke having spaced apertured sidearms slidably receiving the slide shaft and having an aperture displaced from and having its axis at right angles to the axis of the sidearm apertures, adapted to receive a crankshaft eccentric pin extending perpendicularly to the longitudinal axis of the slide shaft, mechanical clearance being provided between the edges of the piston skirt and adjacent parts of the sidearms.
Claim 3
Dependent Claim
19 words
Hermetically sealed motor-compressor apparatus as defined in claim 1 wherein the said piston, crossmember and tongue are integrally formed.
Claim 4
Dependent Claim
40 words
Hermetically sealed motor-compressor apparatus as defined in claim 1 wherein the said piston has formed in its skirt slots of appreciable width, said slots being formed at positions away from the said crossmember and said slots opening above said crossmember.
Claim 5
Dependent Claim
23 words
Hermetically sealed motor-compressor apparatus as defined in claim 1 wherein the said cylindrical piston is hollow over the greater part of its length.