1994-03-04
1995-03-21
Denion, Thomas E.
Pumps
Intensifier
91345, 91346, 60563, F04B 1700
Patent
active
053990714
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a pressure booster for converting a relatively low input pressure from a pressure source into a relatively high output pressure.
Before being approved for use, pressurized installations, or parts thereof, have to be tested not only at their rated pressures, but at pressures higher at least by the safety factors set for particular pieces of equipment. While factories producing certain discrete pieces of equipment reaction vessels, boilers, tanks and the like-obviously have in-house facilities for testing, other products must be tested after assembly-or repair-in the field. Such items include, e.g., sections of pipe lines, radiators, etc.
For this purpose, there exist mobile pressure generators operated either manually or electrically. The former are bulky and relatively heavy, and-involve a considerable physical exertion. The latter obviously need a power source which, under field conditions, is not readily available.
It is one of the objectives of the present invention to overcome the drawbacks and disadvantages of the prior art pressure boosters and to provide a pressure booster that uses line pressure as primary pressure source; that is light-weight and thus easily moved; and that, being manually operated, requires no electric power source, yet demands no physical effort beyond the shifting of a valving grip.
According to the invention, this is achieved by providing a liquid pressure booster comprising a head member with a low-pressure inlet connectable to a liquid source at mains pressure, a high-pressure outlet connectable to the object to be tested, and a central bore; a compound cylinder constituted by a first, upper, relatively small-diameter portion fluid-tightly attached to said head member and a second, lower, relatively large-diameter portion contiguous with said upper portion and closed off at its lower end by a bottom plate having a drain opening; a substantially hollow compound piston having two active portions: a first, relatively small-diameter portion fitting, and movable in, said first cylinder portion and adapted, when acting, to produce a relatively high pressure, and a second, relatively large-diameter portion, contiguous with said first portion, fitting, and movable in, said second cylinder portion, and adapted to be acted upon by a relatively low pressure; a central, at least partly hollow, valving bar actuatable from outside of said head member and movable in reciprocating translation between a first and a second position; a bistable valving sleeve slidably seated on said valving bar and movable in reciprocating translation between a first and a second position; first spring means for biasing said compound piston towards said bottom plate; second spring means for producing a snap-action impulse causing said bistable valving sleeve, in dependence of, and in coordination with, the movement of said compound piston, to alternate between said first and said second positions.
The invention further provides a liquid pressure booster comprising a head member with a low-pressure inlet socket connectable to a liquid source at mains pressure, and a high-pressure outlet socket connectable to the object to be tested; a compound cylinder constituted by a first, relatively small-diameter portion and a second, two-part, relatively large-diameter portion, the upper one of said two parts carrying said head member to which said first, small-diameter portion is tightly attached, the lower one of said two parts having a bottom surface; a compound piston constituted of two active portions: a first, substantially hollow, relatively small-diameter portion fitting, and slidable in, said first cylinder portion, and a second, relatively large-diameter portion movable in said second cylinder portion, with the large-diameter piston portion dividing said second, large-diameter cylinder portion into a pressurizable chamber on the one hand, and into a vented chamber communicating with the atmosphere, on the other; first valve means located on top of said head member and having at l
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Abraham Moshe
Stahl Zeev
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