Piston with cushioning spear having exhaust ports therein

Details Piston with cushioning spear having exhaust ports therein Piston with cushioning spear having exhaust ports therein

1990-12-18

1992-06-30

Look, Edward K.

Expansible chamber devices

With means to control flow of non-working arresting fluid...

Work member position control

92 82, 92 85B, 92143, 91407, 91409, F15B 1522

Patent

active

051253259

ABSTRACT:
Cylinders of the type used in fluid power systems are cushioned by a floating spear. The reciprocating piston is centrally bored to receive the spear. Accordingly, the spear and piston are movable independent of each other. A blind axial bore is formed in opposite ends of the spear and one or more diametrically extending bores are also formed in the spear in open fluid communication with those axial bores. Thus, when the spear enters the cushion cavity, the piston continues its motion and progressively blocks off the diametrically extending bores. Air in the cylinder cavity escapes into the atmosphere through the cushion cavity, but is constrained to enter the spear through one or more of the diametrically extending bores and hence through an axially extending blind bore. The length of the spear is variable, as is the length and diameter of the blind bore and the number, diameter, and spacing of the diametrically extending bores. Thus, the deceleration of the piston is programmable.

REFERENCES:
patent: 2768611 (1956-10-01), Anderson
patent: 3264942 (1966-08-01), Witt
patent: 3390616 (1968-07-01), Hammer
patent: 4043787 (1977-08-01), Foster
patent: 4706781 (1987-11-01), Ikimi et al.
patent: 4862786 (1989-09-01), Boyer et al.
patent: 4982652 (1991-01-01), Blatt

Affiliated with

Also associated with

Rating

Piston with cushioning spear having exhaust ports therein does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Piston with cushioning spear having exhaust ports therein, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Piston with cushioning spear having exhaust ports therein will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1856486