Piston, in particular for sampling valve

Details Piston, in particular for sampling valve Piston, in particular for sampling valve

2006-04-18

2006-04-18

Fenstermacher, David M. (Department: 3682)

Machine element or mechanism

Mechanical movements

Reciprocating or oscillating to or from alternating rotary

C074S089410

Reexamination Certificate

active

07028569

ABSTRACT:
The invention concerns a piston wherein the mobile screw (2) is engaged in the bolt (8) integral with the mobile assembly (1). It is provided with a cylindrical axial housing (10) wherein is engaged the rod (7) integral at its front end with the expander assembly (4). At the end of its front travel, the rod is retained by its flange (19) pressed on the stop (11) such that the expanding ring (5) is compressed by the thrust of the piston body (3) and causes the flexible envelope (6) to expand.

REFERENCES:
patent: 2394687 (1946-02-01), Hein
patent: 3589677 (1971-06-01), Segers
patent: 3615241 (1971-10-01), Low et al.
patent: 3747479 (1973-07-01), Nightingale et al.
patent: 3991616 (1976-11-01), Stahli
patent: 5152678 (1992-10-01), Zeck
patent: 5536471 (1996-07-01), Clark et al.
patent: 364670 (1962-09-01), None
patent: 3109350 (1982-04-01), None

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