Abstract: A high-pressure waterjet cutting system includes a pump operable to produce a flow of pressurized hydraulic fluid, a piston receiving the flow of pressurized hydraulic fluid and reciprocating in response to a pressure differential produced by the flow of pressurized hydraulic fluid, and an intensifier connected to the piston and operable to produce a high-pressure flow of water in response to reciprocation of the piston. A valve is positioned to receive the flow of hydraulic fluid and is movable between a first position in which the pressure differential is a first value and a second position in which the pressure differential is a second value less than the first value.

Abstract: A high-pressure waterjet cutting system includes a pump operable to produce a flow of pressurized hydraulic fluid, a piston receiving the flow of pressurized hydraulic fluid and reciprocating in response to a pressure differential produced by the flow of pressurized hydraulic fluid, and an intensifier connected to the piston and operable to produce a high-pressure flow of water in response to reciprocation of the piston. A valve is positioned to receive the flow of hydraulic fluid and is movable between a first position in which the pressure differential is a first value and a second position in which the pressure differential is a second value less than the first value.

Abstract: A seal carrier is provided for an ultrahigh-pressure fluid system having a plunger configured to reciprocate therein along a longitudinal axis when the ultra-high pressure fluid system is in operation, the seal carrier having an inner surface provided with a first portion configured to captively receive a seal, substantially preventing displacement of the seal in a direction substantially parallel to the longitudinal axis, and a second portion configured to circumferentially surround a bearing. The seal carrier is further provided with an outer surface having a recess formed along at least a portion of a circumference thereof, the recess at least partially positioned opposite the first portion of the inner surface along a lateral axis substantially perpendicular to the longitudinal axis.

Abstract: A seal carrier is provided for an ultrahigh-pressure fluid system having a plunger configured to reciprocate therein along a longitudinal axis when the ultra-high pressure fluid system is in operation, the seal carrier having an inner surface provided with a first portion configured to captively receive a seal, substantially preventing displacement of the seal in a direction substantially parallel to the longitudinal axis, and a second portion configured to circumferentially surround a bearing. The seal carrier is further provided with an outer surface having a recess formed along at least a portion of a circumference thereof, the recess at least partially positioned opposite the first portion of the inner surface along a lateral axis substantially perpendicular to the longitudinal axis.

Abstract: An ultrahigh-pressure fluid system, such as an ultrahigh-pressure fluid pump, includes an improved dynamic seal assembly that can withstand pressures above 40,000 psi, and more preferably, pressures up to and beyond 87,000 psi. The dynamic sealing assembly includes a plastic seal having a bore through which the plunger reciprocates, and a bearing positioned adjacent the seal, also having a bore through which the plunger reciprocates. A seal carrier surrounds the circumference of the bearing and is subjected to a compressive force that is sufficiently high to circumferentially collapse the seal carrier in a radial direction against the bearing. This collapse of the seal carrier against the bearing causes an inner surface of the bore through the bearing to achieve substantially uniform contact with an outer surface of the plunger when the assembly is subjected to ultrahigh-pressure, thereby eliminating gaps that occur in prior art systems.

Abstract: A method (300) and arrangement for LZ1 compression of a data string where multiple input symbols are compared in parallel with the history buffer by: holding in an input buffer (140) a first sequence of bytes of the data string; holding in a history buffer (110, 120) a second sequence of bytes of the data string; comparing (170), in matrix comparison means coupled to the input buffer and the history buffer and having a plurality of rows and columns of comparison units (200), bytes held in the input buffer with bytes held in the history buffer, bytes of the history buffer being coupled to diagonally displaced comparison units in the matrix comparison means; detecting (150) in each of the rows the column in which a largest number of consecutive byte matches has occurred at the comparison unit in that row and preceding comparison units in the same column; and encoding (160) as a token a sequence of matched bytes detected in the step of detecting (150).

Abstract: An apparatus for performing data compression is disclosed. A circuit (640) within a comparison unit (400) of a comparison matrix (170) performs LZ1 compression of a data string by comparing bytes held in an input buffer (140) with bytes held in a history buffer (110, 120). A group of logic gate stages (720, 730, 740, 750) is connected in series with each other. Each of the logic gate stages produces a carry value that is passed to one of the output of the comparison unit and another logic gate stages. The product of the number stages in the logic gate stages and the number logic gates in each of the logic gate stages is less than the number of logic gates required for an equivalent circuit having a single logic circuit stage.

Abstract: An ultrahigh-pressure fluid system, such as an ultrahigh-pressure fluid pump, includes an improved dynamic seal assembly that can withstand pressures above 40,000 psi, and more preferably, pressures up to and beyond 87,000 psi. The dynamic sealing assembly includes a plastic seal having a bore through which the plunger reciprocates, and a bearing positioned adjacent the seal, also having a bore through which the plunger reciprocates. A seal carrier surrounds the circumference of the bearing and is subjected to a compressive force that is sufficiently high to circumferentially collapse the seal carrier in a radial direction against the bearing. This collapse of the seal carrier against the bearing causes an inner surface of the bore through the bearing to achieve substantially uniform contact with an outer surface of the plunger when the assembly is subjected to ultrahigh-pressure, thereby eliminating gaps that occur in prior art systems.