Back to results
US 5,706,716 AGranted
Variable displacement swash plate type compressor
AssigneeCalsonic Corporation
InventorYukio Umemura
Life of this patent
Estimating the term…
Abstract
In a variable displacement swash plate type compressor, there is employed a structure for stopping or minimizing a turning movement of a piston about its axis. The structure comprises a given part of the piston which is always out of the corresponding cylinder chamber; a turn stopper portion formed on the given part and including laterally opposed sides each having a rounded outer surface; and a cylindrical surface defined in a casing of the compressor at a portion which faces the turn stopper portion. The cylindrical surface is so arranged as to make a surface-to-surface contact with one of the laterally opposed sides when the piston is turned about its axis by a given angle.
Claims20
A variable displacement swash plate type compressor comprising:
- a casing having a plurality of cylinder chambers circumferentially arranged therein;
- a plurality of pistons incorporated with said cylinder chambers respectively;
- a drive shaft extending in said casing;
- a swash plate disposed on said drive shaft and inclinable relative to the same;
- means for causing said swash plate to make spiral turns when said drive shaft is rotated;
- means for achieving a hinged connection between the swash plate and each of the pistons so that when the drive shaft is rotated, each piston reciprocates in a corresponding cylinder chamber;
- and
- a structure for minimizing a turning movement of each piston about its axis, said structure including
- a turn stopper portion formed on a part of said piston which is constantly out of the corresponding cylinder chamber, said turn stopper portion including laterally opposed shoulder-shaped sides each having a rounded outer surface therethroughout;
- and
- means defining a cylindrical surface in said casing at a portion which faces said turn stopper portion, said cylindrical surface being so arranged as to make a surface-to-surface contact with one of said laterally opposed shoulder-shaped sides when said piston is turned about its axis by a given angle.
8 more elements
A variable displacement swash plate type compressor comprising:
- a casing having a plurality of cylinder chambers circumferentially arranged therein;
- a plurality of pistons incorporated with said cylinder chambers respectively;
- a drive shaft extending in said casing;
- a swash plate disposed on said drive shaft and inclinable relative to the same;
- means for causing said swash plate to make spiral turns when said drive shaft is rotated;
- means for achieving a hinged connection between the swash plate and each of the pistons so that when the drive shaft is rotated, each piston reciprocates in a corresponding cylinder chamber;
- and
- a structure for minimizing a turning movement of each piston about its axis, said structure including
- a turn stopper portion formed on a part of said piston which is constantly out of the corresponding cylinder chamber, said turn stopper portion including a major part which has a rounded outer surface and laterally opposed rounded edges;
- and
- means defining a cylindrical surface in said casing at a portion which faces said turn stopper portion, said cylindrical surface being so arranged as to make a surface-to-surface contact with one of said laterally opposed edges when said piston is turned about its axis by a given angle.
8 more elements
A variable displacement swash plate type compressor comprising:
- a casing having a plurality of cylinder chambers circumferentially arranged therein;
- a plurality of pistons incorporated with said cylinder chambers respectively;
- a drive shaft extending in said casing;
- a swash plate disposed on said drive shaft and inclinable relative to the same;
- means for causing said swash plate to make spiral turns when said drive shaft is rotated;
- means for achieving a hinged connection between the swash plate and each of the pistons to make a reciprocative movement of each piston when the drive shaft is rotated;
- and
- a structure for minimizing a turning movement of each piston about its axis, said structure including:
- a given part of the piston which is always out of the corresponding cylinder chamber;
- a turn stopper portion formed on said given part, said turn stopper portion including a major part which has a rounded outer surface;
- and
- a cylindrical surface defined by an inner wall of said casing at a position which faces said turn stopper portion, said cylindrical surface including two parallel bank portions which extend axially and have each a cylindrical top surface, and means which defines an axially extending groove between said two parallel bank portions, the cylindrical top surface of each bank portion being so arranged as to make a surface-to-surface contact with the rounded outer surface of the major part of said turn stopper portion when said piston is burned about its axis by a given angle.
9 more elements
A variable displacement swash plate type compressor comprising:
- a casing having a plurality of cylinder chambers circumferentially arranged therein;
- a plurality of pistons incorporated with said cylinder chambers respectively;
- a drive shaft extending in said casing;
- a swash plate disposed on said drive shaft and inclinable relative to the same;
- means for causing said swash plate to make spiral turns when said drive shaft is rotated;
- means for achieving a hinged connection between the swash plate and each of the pistons to make a reciprocative movement of each piston when the drive shaft is rotated;
- and
- a structure for minimizing a turning movement of each piston about its axis, said structure including:
- a given part of the piston which is always out of the corresponding cylinder chamber;
- a turn stopper portion formed on said given part, said turn stopper portion including a major part which has a rounded outer surface, laterally opposed rounded sides and axially opposed rounded sides;
- and
- means defining a cylindrical surface in said casing at a portion which faces said turn stopper portion, said cylindrical surface being so arranged as to make a surface-to-surface contact with one of said laterally opposed rounded sides when said piston is turned about its axis by a given angle and so arranged as to make a surface-to-surface contact with one of said axially opposed rounded sides when said piston is subjected to a pitching motion.
9 more elements
A variable displacement swash plate type compressor comprising:
- a casing having a plurality of cylinder chambers circumferentially arranged therein and an inner cylindrical surface adjacent to said cylinder chambers;
- a drive shaft;
- a variable-tilt swash plate rotated by said drive shaft;
- and
- a plurality of pistons, each piston having a head portion that is slidably received in one of said cylinder chambers and reciprocates within a corresponding cylinder chamber in response to a rotation of said swash plate and a turn stopper portion that does not enter the corresponding cylinder chamber, the turn stopper portion including an outer surface opposing the inner cylindrical surface of said casing and laterally opposed rounded corners, one of said laterally opposed corners making a surface-to-surface contact with the inner cylindrical surface of said casing when said piston is turned about a center axis of said piston.
2 more elements
Dependencies are inferred from the claim text.