Combined variable volume air pump and peristalic pump

Details Combined variable volume air pump and peristalic pump Combined variable volume air pump and peristalic pump

1995-06-13

1997-08-12

Thorpe, Timothy

Pumps

Diverse pumps

F04B 2310

Patent

active

056558899

ABSTRACT:
A combined constant-speed, variable-volume, piston-type air pump and peristalic pump. The air pump has a "minimum gap", i.e., has a piston head which is closely adjacent to the cylinder head at the completion of the compression stroke. The piston intake stroke is selectively adjustable between a maximum and a minimum position to thus vary the volume of air pumped. A motor means drives both pumps simultaneously. The peristalic pump comprises a pump housing mounted on a frame, having an inner circumferential track and a central opening. A rotor is positioned in said central opening, and has at least two rollers mounted thereon for rotation about axes parallel to said shaft axis. Flexible, compressible, hollow tube means is positioned between said rollers and said track.

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Hajec handwritten memorandum dated Aug. 2, 1993.
Stoelting P.O. 16069-00 dated Aug. 4, 1993 to Vikeland ordering 10 ice cream mix and air pump per Jul. 8, 1993 B.GOCH requirement memo with 100" wall.
Falcon Electric Corp. Aug. 10, 1993 letter.
Falcon Electric Corp. Aug. 12, 1993 letter.
Vikeland (Kletch) Sep. 2, 1993 memorandum to Hajec (2 pages).
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Stoelting May 5, 1994 letter to Chet Hajec (Vikeland).
Hajec May 16, 1994 letter to Stoelting.
Stoelting May 23, 1994 letter to Chet Hajec (Vikeland).
Stoeltng Oct. 4, 1994 letter to Chet Hajec (2 pages).
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Stoelting Nov. 30, 1994 letter to Chet Hajec.
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Stoelting Apr. 17, 1995 letter to Falcon Electric.
Stoelting May 9, 1995 letter to Falcon Electric (5 pages).
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Stoelting May 18, 1995 letter to B. Linnerooth (Falcon Electric) (3 pages).
Chester S. Hajec Declaration.

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