US 9,808,817 B2
Paint sprayer floating pump
Mariusz J. Luczak, Elk River, MN (US); and Harold D. Johnson, Zimmerman, MN (US)
Assigned to Graco Minnesota Inc., Minneapolis, MN (US)
Filed by Graco Minnesota Inc., Minneapolis, MN (US)
Filed on May 1, 2015, as Appl. No. 14/701,784.
Claims priority of provisional application 61/987,659, filed on May 2, 2014.
Prior Publication US 2015/0314312 A1, Nov. 5, 2015
Int. Cl. B05B 9/04 (2006.01); B05B 9/08 (2006.01); B05B 11/00 (2006.01)
CPC B05B 9/0861 (2013.01) [B05B 9/0426 (2013.01); B05B 9/0855 (2013.01); B05B 11/3001 (2013.01); B05B 11/3015 (2013.01); B05B 11/3043 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A fluid sprayer comprising:
a pump motor;
a piston reciprocatable by the pump motor along a pump axis;
a pump housing comprising:
a pumping chamber housing disposed to receive the piston along the pump axis; and
a plurality of alignment pins extending laterally away from the pumping chamber housing; and
an outer housing surrounding and anchoring the pump motor, and having a plurality of internal lateral bores disposed to slideably receive the alignment pins, such that the pump housing is locked against axial movement along the pump axis and is free to self-align with the piston by movement within the outer housing along a dimension perpendicular to the pump axis.