Patent ID: 8246327
Filing Date: 2012-08-21
Classification: F04B

Abstract:
1. A rocking piston compressor comprising: a drive shaft having a proximal portion passing through at least one proximal piston and a distal portion passing through at least one distal piston, the drive shaft defining a horizontal axis, the proximal portion of the drive shaft and proximal piston being accommodated in a proximal housing, the distal portion of the drive shaft and distal piston being accommodated in a distal housing, the proximal and distal housings being connected to and disposed on opposite sides of a cylindrical motor housing, the proximal and distal housings each comprising proximal and distal bodies respectively, the proximal and distal bodies each having a substantially U-shaped cross-section through which the horizontal axis of the drive shaft passes, the proximal and distal bodies each comprising an open top connected to a head assembly and two opposing sides connected by a bottom, the proximal and distal bodies each being directly connected to a pair of side foot mounts disposed opposite to each other relative to their respective bodies, each side foot mount comprising a flat and horizontal bottom surface that is coplanar with the other side foot mount disposed opposite its respective body, the bottom surfaces of the side foot mounts each being spaced vertically above a portion of the bottom of its respective body that is in vertical alignment with the horizontal axis of the drive shaft by a first height, the bottom surfaces of the side foot mounts extending outward from the opposing sides of their respective bodies and beyond the opposing sides of their respective bodies so that the side foot mounts can support each side of their respective bodies of the compressor over a horizontal opening that is wider than the opposing sides of the proximal and distal bodies and the cylindrical motor housing but not as wide as a horizontal distance between the pair of side foot mounts connected to the proximal body and the pair of side foot mounts connected to the distal body, each side foot mount being fixedly connected to their respective bodies and comprising a hole with a vertical axis for receiving a vertical fastener for suspending the compressor in the horizontal opening, the compressor further comprising four bottom foot mounts disposed beneath the proximal and distal bodies and not extending laterally beyond the proximal and distal bodies, each bottom foot mount comprising a vertical outer wall that is disposed laterally inside of all connections between the side foot mounts and the U-shaped body to provide vertical clearance below each side foot mount which prevents the bottom foot mounts from interfering with placing the side foot mounts outside of the horizontal opening for suspending the compressor in the horizontal opening when the compressor is lowered vertically into the horizontal opening, the axis of the drive shaft being spaced vertically above the portion of the bottom of the U-shaped body that is in vertical alignment with the axis of the drive shaft by a second height, the first height falling in the range of less than the second height to greater than 0.5 times the second height.