Machine with a reciprocating piston

A method of operating a machine, comprising:

• rotating a rotary member around a first axis;
• controlling the position of a piston within a chamber with a linkage connected between the rotary member and the piston, wherein:
• a first link member of the linkage connects to the rotary member in a manner limiting relative rotation between the first link member and the rotary member to relative rotation about a second axis disposed at an angle to the first axis;
• and
• the linkage is configured such that, during each revolution of the rotary member around the first axis, the linkage causes the piston to undergo a sequence of motions, including:
• a first stroke in a first direction;
• a second stroke in a second direction;
• a third stroke in the first direction;
• a fourth stroke in the second direction;
• and
• adjusting the linkage to adjust the motion of the piston.

A machine, comprising:

• a rotary member;
• a first piston disposed within a first chamber;
• a first linkage connecting the first piston to the rotary member in such a manner to cause the first piston to reciprocate during rotation of the rotary member, wherein the first linkage includes one or more adjusters configured to adjust the first linkage;
• a second piston disposed within a second chamber;
• and
• a second linkage connecting the second piston to the rotary member in such a manner to cause the second piston to reciprocate during rotation of the rotary member, the second linkage being non-adjustable.