Methods and apparatuses for joining a pumping cartridge to a...

Details Methods and apparatuses for joining a pumping cartridge to a... Methods and apparatuses for joining a pumping cartridge to a...

2008-03-04

2008-03-04

Bryant, David P. (Department: 3726)

Metal working

Method of mechanical manufacture

Prime mover or fluid pump making

C604S220000, C604S228000

Reexamination Certificate

active

10756801

ABSTRACT:
Apparatus and methods of their use are described for engaging a pumping cartridge with a pump drive. In certain embodiments, the cartridge, comprising a cylinder and a movable piston assembly, is initially assembled or subsequently positioned so that the distance between the attachment point on the piston assembly for coupling to a drive assembly, and a reference point on the cylinder, is greater than the maximal distance that will be encountered during normal oscillation of the piston during use. The cartridge, in certain embodiments may be pressed into a drive assembly having means for immobilizing the cartridge and means for coupling the piston assembly to the driveshaft. In certain embodiments, when the cartridge is fully inserted into the drive assembly, the piston is pressed into the cylinder sufficiently to establish a selected distance so that the piston shaft is in the proper position to engage with a coupling mechanism carried on the driveshaft.

REFERENCES:
patent: 2702547 (1955-02-01), Glass
patent: 4677980 (1987-07-01), Reilly et al.
patent: 5411380 (1995-05-01), Bristol et al.
patent: 6378737 (2002-04-01), Cavallaro et al.

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