Loading patent…
AssigneeGeneral Motors Corporation
InventorsKurt R. Mittlefehldt, Daniel P. Kurbiel, Michael G. Thurston, David M. Ebbing
Estimating the term…
A swash plate piston (20) of integral, one piece design has outer surface portions in contact with much of the total available inner surface of the cylinder bore (18), but with a basically hollow design that can be easily manufactured. Outer (36) and inner (38) semi cylindrical segments of the piston (20) extend axially back from a cylindrical head (32), but leave the center of the piston body entirely open and empty. A slanted wing member (40) extends out and down from the inner segment (38), into the outer segment (36), creating a four sided, frame like structure of superior strength. All of the outboard outer surfaces of the piston (20) lie on the same cylindrical envelope as the cylinder bore (18) itself, giving good, even support. However, none of the outer surfaces, outboard or inboard, present any concavities that would jeopardize the ability to form the piston (20) with only two forming elements that part in a straight line.
An integral piston (20) for use in an air conditioning compressor (10) having cylinder bores (18) arrayed in a circular pattern around a generally cylindrical cylinder block (16), in which a piston (20) is reciprocated back and forth in each cylinder bore (18) with close sliding contact between said piston (20) and cylinder bore (18), and in which said piston (20) has a cylindrical outer envelope comprised of a front end (F), a back end (B), a semi cylindrical outer surface portion (O) facing radially outwardly of said cylinder block (16), a semi cylindrical inner surface portion (I) and two semi cylindrical side surface portions (S), said inner (I) and outer (O) surface portions being bisected by a central plane (P) through a central axis (A) of said piston (20), said piston (20) comprising,
Dependencies are inferred from the claim text.