Continuous flow rotary pump

• US 3,865,523 A
• Filed: 03/16/1973
• Issued: 02/11/1975
• Est. Priority Date: 03/16/1973
• Status: Expired due to Term

• Current Assignee: Samuel J. Baehr
• Original Assignee: Samuel J. Baehr
• Inventors: Baehr, Samuel J.
• Primary Examiner(s): Husar, C. J.
• Application Number:
  US05/342,071
• Time in Patent Office: 697 Days
• Field of Search: 418/201,202
• US Class Current: 418/201.1
• CPC Class Codes: F04C 2/16 with helical teeth, e.g. chevron-shaped, screw type for non-parallel axes of movement F04C3/00

Abstract

In a rotary pump of the type providing for continuous displacement and flow of a fluid material, said pump includes a housing having an intake port and an outlet, a pair of intermating rotor means disposed for rotation within said housing, and said rotors are in communication with said inlet port and outlet so as to provide for the displacement of said fluid material. An elongated channel is formed communicating with each of the inlet port and the outlet so that as fluid material is drawn into the housing it will be exposed to the helical spacings formed along the length of the rotor means, at their point of intermeshing, and likewise said fluid material will be discharged under the induced pressure that forms along the elongated channel communicating with the outlet of said pump housing.

Claims

1. In a positive displacement rotary pump of the type designed for inducing continuous transfer of fluid material comprising, a pump casing having side and end walls, said casing having a pair of communicating and parallel cavities formed therein, said casing having an intake port and an outlet port provided upon its approximate opposite sides and opening into said cavities at the location of their communication within said casing, said casing being formed having channels provided upon its interior cavity surfaces, one of said channels being in communication with the intake port, and the other of said channel being in communication with the outlet port, said channels being elongated and arranged substantially in parallel with the length of said cavities, a pair of parallelly arranged and intermeshing rotor means, one of each rotor means disposed for close tolerance rotation within each of said cavities, said rotor means intermeshing at the vicinity of the communication between said casing cavities, each rotor means having a shaft extending axially from each of its ends, said shafts being bearing mounted within the end walls of said casing, one of said rotor means including a series of helical ribs formed upon its surface, the other of said rotor means including a series of helical flutes formed upon its surface, said rotor ribs and flutes being intermeshed, a plurality of said ribs and flutes being simultaneously in communication with either the elongated intake port and outlet port channels for providing pulse-free displacement of fluid materials and the continuous discharge of multiple quantities of said fluid material along the length of said rotor means, and at least one of said intermeshed ribs and flutes always being simultaneously in communication with both the intake and outlet channels during operation of said rotary pump.

2. The invention of claim 1 wherein said helically arranged ribs and flutes of the rotor means extend approximately 140* to 180* around the rotor means, and each further extends from end to end of said rotor means.

3. The invention of claim 1 and including a drive means connecting to and providing for rotation of said rotor means.

4. The invention of claim 3 and including a pair of intermeshing spur gears, one of each spur gears operatively associated with one of said rotor means, the operation of said drive means provided for contrarotation of said spur gears and rotor means for effecting displacement of the fluid material.

5. The invention of claim 1 wherein said intake port and outlet are disposed laterally on opposite sides of said housing and proximate the location where said pair of rotor means intermate.

6. The invention of claim 1 wherein said axial shafts are bearing mounted and form a fluid tight seal in the end walls of said casing.

7. The invention of claim 1 wherein the helical ribs are in the form of projecting lobes.

8. The invention of claim 7 wherein the rotor lobes and flutes are semicircular in design.

9. The invention of claim 1 wherein said channels have a length approximating the length of the rotor means.

10. The invention of claim 1 wherein the height of the channel at the intake port has upper and lower reaches disposed approximately 180* from the respective upper and lower reaches of the channel communicating with the outlet.

11. The invention of claim 1 wherein each rib is helically formed approximately 180* around the rotor means, and each flute is formed helically approximately 140* around its rotor means.