US 11,751,735 B2
Vacuum and hose retraction system
Grant Olewiler, Bakersfield, CA (US)
Assigned to M.D. Manufacturing, Inc., Bakersfield, CA (US)
Filed by M.D. Manufacturing, Inc., Bakersfield, CA (US)
Filed on Jun. 1, 2020, as Appl. No. 16/889,598.
Prior Publication US 2021/0369066 A1, Dec. 2, 2021
Int. Cl. A47L 5/30 (2006.01); A47L 9/24 (2006.01); A47L 9/26 (2006.01); A47L 9/28 (2006.01); A47L 9/00 (2006.01); A47L 9/30 (2006.01); A47L 9/04 (2006.01); A47L 9/32 (2006.01)
CPC A47L 5/30 (2013.01) [A47L 9/009 (2013.01); A47L 9/0411 (2013.01); A47L 9/0466 (2013.01); A47L 9/242 (2013.01); A47L 9/248 (2013.01); A47L 9/26 (2013.01); A47L 9/2857 (2013.01); A47L 9/2868 (2013.01); A47L 9/30 (2013.01); A47L 9/325 (2013.01); A47L 2201/04 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A vacuum unit comprising:
a) a housing;
b) a first chamber in said housing having a first suction source therein for removing air from an adjacent debris collection chamber;
c) a second chamber in said housing separated from said first chamber and from said debris collection chamber, said second chamber having a second suction source therein for removing air from an adjacent third chamber in said housing, said third chamber being separated from said first chamber and from said debris collection chamber;
d) a port in said third chamber for communication between an interior and exterior of said third chamber;
e) an elongated vacuum hose provided in said third chamber wherein a first end of said hose extends through a sealed coupling into said debris collection chamber and is sealingly attached to a side or bottom of a debris collection bag, such that suction from said first suction source is transmitted through said bag to said hose, said hose being movably extendable through said port;
f) an opening between said third chamber and said second chamber such that suction from said second chamber is transmitted into said third chamber for retracting said hose into said third chamber;
g) a deflector attached inside said third chamber adjacent to said port for deflecting said hose into said third chamber during retraction; and
h) at least one switch at an opposite end of said hose for electronically controlling said first and second suction sources.