Manufacture of banded pistons

Details Manufacture of banded pistons Manufacture of banded pistons

1995-02-10

1996-12-31

Nguyen, Hoang

Expansible chamber devices

Piston

Plural integral radially extending resilient metallic...

92250, 277170, 29888049, F16J 900, F16K 4100

Patent

active

055883508

ABSTRACT:
A banded cylindrical piston for use in fluid cylinders is produced by hot-forming a relatively thin, flat washer made of polytetrafluoroethylene (PTFE) onto a grooved piston. A hot-forming sizing tube has a beveled entrance end on which the washer is initially preheated, a first section of a greater diameter than the end diameter of a finished unit for preliminarily elongating the preheated washer as it assumes sleeve shape and a final hot-forming second section in which the PTFE material is forced to flow under pressure into the piston grooves. The cross-sectional configuration of the groove or grooves is such as to enhance flowability of the material during hot-forming toward and into contact with a side of the groove nearest the head end of the piston to improve the mechanical gripping effect of band to piston. The side of the groove nearest the head end of the piston is preferably at an acute angle relative to an adjacent land on the periphery of the piston.

REFERENCES:
patent: 2176281 (1939-10-01), Stillwagon
patent: 3212411 (1965-10-01), Storms
patent: 3730305 (1973-05-01), Fouts
patent: 5345860 (1994-09-01), Bowell
patent: 5435233 (1995-07-01), Bowell

Affiliated with

Also associated with

Rating

Manufacture of banded pistons does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Manufacture of banded pistons, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Manufacture of banded pistons will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1134695