Abstract Fluid pumping apparatus, particularly for compressing fluid refrigerants, with a plurality of cylinder piston units mounted in diverging angular relationship, the pistons being connected to a single crankjournal on the crankshaft by one-piece connecting rods with antifriction bearings in the crank connected ends. The crankshaft is of two-piece construction and releasably connected at the crank journal to facilitate assembly and disassembly of the connecting rods. The compressor frame is of hollow sectionalized construction and arranged with a crank case which is split at the axis of the crankshaft to facilitate assembly and disassembly of the shaft, the shaft supporting bearings, and the pistons. Each cylinder is closed at its outer end by a cavitated head cap with an inlet compartment and outlet exhaust compartment, the inlet compartment being connected to a common fluid inlet cavity formed in the hollow frame, and from which fluid is fed to all of the pumping cylinders. Provision is made for valve unloading which permits selective incremental control of the output capacity level of the compressor.
Fluid pumping apparatus having a plurality of cylinder-piston units positioned in diverging angular relation on one side of a diametral plane through the axis of a common rotatable drive shaft connected to the pistons, the improvement comprising: a. a crankcase including separate interconnected sections interfacing adjacent the drive shaft on an extended diametral plane through its axis, one of said crankcase sections providing a stationary support for the cylinders of said units; b. said sections at opposite ends of said shaft having cooperative portions forming a tubular support for a bearing; and c. a cylindrical anti-friction shaft bearing supported in each of said bearing supports, whereby said shaft is rotatably supported by said sections and upon disconnection and separation of said sections the shaft is free for disassembly.
Claim 2
Dependent Claim
128 words
Fluid pumping apparatus having a plurality of cylinder-piston units positioned in diverging angular relation on one side of a diametral plane through the axis of a common rotatable drive shaft connected to the pistons, the improvement comprising: a. a crankcase including separate interconnected sections interfacing adjacent the drive shaft on an extended diametral plane through its axis, one of said crankcase sections providing a stationary support for the cylinders of said units; b. said sections at opposite ends of said shaft having cooperative portions forming a tubular support for a bearing; and c. a cylindrical anti-friction shaft bearing supported in each of said bearing supports, whereby said shaft is rotatably supported by said sections and upon disconnection and separation of said sections the shaft is free for disassembly.
Claim 3
Dependent Claim
30 words
Apparatus according to claim 1, wherein said shaft includes a single crank journal, and said pistons are actuated by piston rods respectively having a bearing connection on said crank journal.
Claim 4
Dependent Claim
27 words
Apparatus according to claim 2, wherein each of said piston rods at its journal connection end is of one-piece construction and includes a bearing receiving tubular bore.
Claim 5
Dependent Claim
21 words
Apparatus according to claim 3, including anti-friction bearing means receivable endwise into a mounted position in each piston rod tubulAr bore.
Claim 6
Dependent Claim
32 words
Apparatus according to claim 2, wherein said shaft is composed of releasably interconnected sections, said sections upon disconnection enabling disassembly of said crank journal and the connected ends of said piston rods.
Claim 7
Dependent Claim
45 words
Apparatus according to claim 2, wherein said crank journal extends between spaced crank arms carried by said shaft, one end of said journal being integral with its associated crank arm, and the other end of said journal being releasably connected with its associated crank arm.