Notched base ring for use with a heat exchanger of a pressure washer

A coil subassembly for use with a heat exchanger of a pressure washer, the coil subassembly comprising:

• a length of heat exchange tubing including an inner coil and an outer coil;
• and a notched base ring attached to the length of heat exchange tubing;
• and the base ring includes a plurality of attachment lugs attached to the length of heat exchange tubing defining a plurality of notches configured to allow the flow of air, the notched base ring comprising:
• a base ring sheet body including a top portion, a bottom portion, a first end connecting the top portion to the bottom portion, and a second end connecting the bottom portion to the top portion;
• the top portion includes a plurality of attachment lugs and defines a plurality of notches, each notch being at least partially defined by two lugs disposed on opposite sides of the notch, the top portion also including an angled top edge that is disposed at each of the attachment lugs;
• and the bottom portion includes an uninterrupted bottom support edge that extends in a ring shape, wherein the base ring sheet body is formed into a substantially cylindrical configuration, defining a radial direction, an axial direction, and a circumferential direction, and including an outer cylindrical surface, an inner cylindrical surface, and defining a gap between the first end and the second end of the base ring sheet body that are disposed adjacent each other circumferentially, and wherein the top edge is angled with respect to the bottom support edge in a circumferential direction of the notched base ring, wherein each notch is similarly configured and the first lateral edge and the second lateral edge of each notch defines a different axial length than any other lateral edge of any other notch.

A notched base ring for use with a heat exchanger of a pressure washer, the notched base ring comprising:

• a base ring sheet body including a top portion, a bottom portion, a first end connecting the top portion to the bottom portion, and a second end connecting the bottom portion to the top portion;
• the top portion includes a plurality of attachment lugs and defines a plurality of notches, each notch being at least partially defined by two lugs disposed on opposite sides of the notch, the top portion also including an angled top edge that is disposed at each of the attachment lugs;
• and the bottom portion includes an uninterrupted bottom support edge that extends in a ring shape, wherein the top edge is angled with respect to the bottom support edge in a circumferential direction of the notched base ring, wherein the base ring sheet body is formed into a substantially cylindrical configuration, defining a radial direction, an axial direction, and a circumferential direction, and including an outer cylindrical surface, an inner cylindrical surface, and defining a gap between the first end and the second end of the base ring sheet body that are disposed adjacent each other circumferentially, and wherein an attachment lug forms at least partially the first end of the base ring sheet body and another attachment lug forms at least partially the second end of the base ring sheet body.