US 12,448,970 B2
Horizontal rotary compressor with enhanced tiltability during operation and other performance metrics
Kang P. Lee, Sudbury, MA (US); and Kevin Olsen, Natick, MA (US)
Assigned to ASPEN COMPRESSOR, LLC, Marlborough, MA (US)
Filed by ASPEN COMPRESSOR, LLC, Marlborough, MA (US)
Filed on Apr. 10, 2023, as Appl. No. 18/132,877.
Application 18/132,877 is a continuation of application No. 17/167,017, filed on Feb. 3, 2021, granted, now 11,655,820.
Claims priority of provisional application 62/969,896, filed on Feb. 4, 2020.
Prior Publication US 2023/0313797 A1, Oct. 5, 2023
Int. Cl. F04C 29/02 (2006.01); F04C 23/00 (2006.01)
CPC F04C 29/028 (2013.01) [F04C 23/008 (2013.01); F04C 29/025 (2013.01); F04C 29/026 (2013.01); F04C 2240/30 (2013.01); F04C 2240/809 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A horizontal compressor comprising:
a shell divided into a motor space and a pump space by a separator, wherein the separator has an oil passage at a lower part of the separator and a gas passage in an upper part of the separator connecting the motor space and the pump space;
a motor positioned in the motor space including a rotor and a stator separated by a gap;
a pump assembly positioned in the pump space;
a sump positioned in a lower part of the shell in the motor space; and
an oil supply tube extending between at least a portion of the sump positioned in the motor space and a portion of the separator,
wherein the oil supply tube extends through the oil passage,
wherein the sump is configured to feed oil collected in the motor space through the oil passage at the lower part of the separator and into the pump assembly to lubricate at least a portion of the pump assembly, and wherein an average pressure in the pump space is lower than an average pressure in the motor space.