Multi-roller surface cleaner systems, methods, and devices with linearly adjustable floating rollers

A surface cleaning system, comprising:

• a cleaner body;
• a recovery container attached to the cleaner body and configured to stow therein debris extracted from a target surface;
• a suction device attached to the cleaner body, fluidly coupled to the recovery container, and configured to generate a suction force to draw the debris into the recovery container;
• a hose fluidly connected to the recovery container and the suction device;
• and
• a surface cleaning head attached to the cleaner body and including:
• a main housing with first and second linear pin slots, a nozzle inlet configured to ingest the debris from the target surface, and a connector port fluidly connected to the nozzle inlet and coupled to the hose to thereby fluidly connect the surface cleaning head to recovery container and the suction device;
• a main roller rotatably attached to the main housing and interposed between the nozzle inlet and the connector port;
• a roller motor attached to the main housing, drivingly connected to the main roller, and operable to selectively rotate the main roller;
• and
• an auxiliary roller rotatably attached to the main housing substantially parallel to and forward of the main roller, the auxiliary roller including a roller shaft with first and second mounting pins projecting from opposing first and second ends, respectively, of the roller shaft and slidably mounted in the first and second linear pin slots, respectively, such that the auxiliary roller floats in the main housing,
• wherein the auxiliary roller slides unobstructed along a rectilinear path between a lowered position and a raised position above the lowered position, the auxiliary roller being biased by gravity from the raised position to the lowered position sans a spring force of a spring.

A method of assembling a surface cleaning head for a surface cleaning system, the surface cleaning system including a fluid conduit and a suction device fluidly connected to the fluid conduit and operable to generate a suction force, the method comprising:

• receiving a main housing of the surface cleaning head, the main housing having first and second linear pin slots, a nozzle inlet configured to ingest debris from a target surface, and a connector port fluidly connected to the nozzle inlet;
• coupling the connector port with the fluid conduit to thereby fluidly connect the surface cleaning head to the suction device;
• rotatably attaching a first roller to the main housing such that the first roller is interposed between the nozzle inlet and the connector port;
• attaching a roller motor to the main housing;
• drivingly connecting the roller motor to the first roller, the roller motor being operable to selectively rotate the first roller;
• and
• rotatably attaching a second roller to the main housing substantially parallel to the first roller, the second roller including a roller shaft with first and second mounting pins projecting from opposing first and second ends, respectively, of the roller shaft and slidably mounted in the first and second linear pin slots, respectively, such that the second roller floats in the main housing.