Patent JPS627686A successfully refreshed from Google Patents.
EP0214749A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Extra-high pressure water injector
Assignee: AIKO ENGINEERING Co Ltd
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Filing: 1986-07-31
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Granted: —
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Expires: 2006-07-31
Abstract
Abstract An ultra-high-pressure rotary water jet gun capable of removing rust, scale, burrs, paint film and other unwanted deposits from the surface of metal, concrete and other materials. An air turbine 30 serves to rotate an eccentric rotor 4 within the gun housing l. A high pressure water line l2 passing through the rotor 4 is connecte to a nozzle head 2l on which are mounted several nozzle tips 23. The nozzle head 2l is driven in a circular path by the eccentric rotor 4 while directing the high pressure water jets against the work piece. A pneumatic circuit and a hydraulic circuit with certain controls are provided.
Inventors
- 👤 Toru Iwamoto
- 👤 Eikichi Shinagawa
- 👤 Takayuki Adachi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 18:20
CPC Classifications
B; B05; B05B; B05B3/00; B05B3/02; B08; B08B; B08B3/00; B08B3/02; B08B3/026; B08B3/028
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
295 words
An ultra-high-pressure rotary water jet gun comprising: a housing l having a grip 3 at the rear-end thereof; an eccentric rotor 4 mounted in said housing l; a water supply tube l2 rotatably mounted in an eccentric position with respect to the centre O of said eccentric rotor 4; a nozzle cartridge 2l carrying one or more nozzle tips 23 connected on the front end of said water supply tube l2; a hydraulic circuit 70 supplying ultra-high-pressure water to said water supply tube l2; and an actuator mounted in said housing l to rotate said eccentric rotor 4, characterised in that said actuator is an air turbine 30 using pressurized air as its power source, and said air turbine 30 comprises a casing 3l secured in said housing l nearby said grip 3, said casing 3l having an inlet port 43 and an outlet port 44, a turbine rotor 33 rotatably supported in said casing 3l and having a spindle 35 extending therefrom, a plurality of vanes 34 radially fixed to said said turbine rotor 33, a planetary gear mechanism 40,4l,42 interconnecting said spindle 35 of said turbine rotor 33 and, an output shaft 38 provided to rotate said eccentric rotor 4; an intake passage 45 for feeding the pressurized air to said inlet port 43; an exhaust passage 46 for discharging waste air from said outlet port 44 to the atmosphere; a control device 60 mounted in said grip 3 for opening and closing said intake passage 45; an operating member 50 mounted on a front portion of said grip 3 to operate said control device 60, and a pneumatic circuit 6l,62,63,64 connected to a terminal portion of said intake passage 45 so as to feed the pressurized air to said air turbine 30.
Claim 2
Dependent Claim
295 words
An ultra-high-pressure rotary water jet gun comprising: a housing l having a grip 3 at the rear-end thereof; an eccentric rotor 4 mounted in said housing l; a water supply tube l2 rotatably mounted in an eccentric position with respect to the centre O of said eccentric rotor 4; a nozzle cartridge 2l carrying one or more nozzle tips 23 connected on the front end of said water supply tube l2; a hydraulic circuit 70 supplying ultra-high-pressure water to said water supply tube l2; and an actuator mounted in said housing l to rotate said eccentric rotor 4, characterised in that said actuator is an air turbine 30 using pressurized air as its power source, and said air turbine 30 comprises a casing 3l secured in said housing l nearby said grip 3, said casing 3l having an inlet port 43 and an outlet port 44, a turbine rotor 33 rotatably supported in said casing 3l and having a spindle 35 extending therefrom, a plurality of vanes 34 radially fixed to said said turbine rotor 33, a planetary gear mechanism 40,4l,42 interconnecting said spindle 35 of said turbine rotor 33 and, an output shaft 38 provided to rotate said eccentric rotor 4; an intake passage 45 for feeding the pressurized air to said inlet port 43; an exhaust passage 46 for discharging waste air from said outlet port 44 to the atmosphere; a control device 60 mounted in said grip 3 for opening and closing said intake passage 45; an operating member 50 mounted on a front portion of said grip 3 to operate said control device 60, and a pneumatic circuit 6l,62,63,64 connected to a terminal portion of said intake passage 45 so as to feed the pressurized air to said air turbine 30.
Claim 3
Dependent Claim
75 words
The ultra-high pressure rotary water jet gun as claimed in claim l, characterised in that said air control device 60 includes a pilot valve 67 mounted in said exhaust passage 46 and in operative relation to the actuation of said operation member 50, and a control valve 66a mounted in said intake passage 45 and which is controlled by said pilot valve 67 in a switching manner to open and close said intake passage 45.
Claim 4
Dependent Claim
104 words
The ultra-high-pressure rotary water jet gun as claimed in claim l, characterised in that said air control device 60 further includes a poppet valve body 9l inserted in a crossward direction to said intake passage 45, a valve rod 94 movably mounted in said valve body 9l, a valve seat 93 formed at the end of said valve body 9l within said intake passage 45, a poppet valve element 92 adjacent to said valve seat 93 at the end of said valve rod 94, and an adjusting screw 95,96 on formed said valve rod 94 for adjusting the clearance of said poppet valve 90.
Claim 5
Dependent Claim
34 words
The ultra-high-pressure rotary water jet gun as claimed in claim l, characterised in that: said pneumatic circuit 6l,62,63,64 comprises an air compressor 6l, air pressure adjusting means 62 and flow rate adjusting means 64.
Claim 6
Dependent Claim
40 words
The ultra-high-pressure rotary water jet gun as claimed in claim l, characterised in that: said hydraulic circuit 70 comprises an ultra-high-pressure water generating device 7l,72,73 and an unloading circuit 76 for guiding the ultra-high-pressure water to a discharging line 75a.
Claim 7
Dependent Claim
61 words
The ultra-high-pressure rotary water jet gun as claimed in claim 5, characterised in that: said unloading circuit 76 comprises a remote control switch 79, a solenoid valve 77a actuated by a signal issued from said remote control switch 79, and an unloading relief valve 74 actuated in combination with said solenoid valve 77a to open and close said discharging line 75a.
Claim 8
Dependent Claim
134 words
The ultra-high-pressure rotary water jet gun as claimed in claim l, characterised in that: said hydraulic circuit 70 is provided with a reciprocating type piston pump 80 provided with an accumulator 88, said piston pump 80 being provided with a low-pressure piston 8l in its central portion and high-pressure pistons 82a,82b in its opposite end portions, said low-pressure piston 8l being reversibly driven by a hydraulic pump 78 through a solenoid-controlled pilot-operated valve 86 so that, according to the reciprocating motion of said low-pressure piston 8l, one of said opposite high-pressure pistons 82a,82b sucks the low-pressure water while the other of said high-pressure pistons 82a,82b discharges ultra-high pressure water which is fed to said accumulator 88 from which said high-pressure water is fed to the nozzle cartridge 2l of said rotary water jet gun.
Claim 9
Dependent Claim
46 words
The ultra-high-pressure rotary water jet gun as claimed in claim 7, characterised in that said solenoid-controlled pilot-operated valve 86 is actuated in a shifting manner by signals issued from two limit switches 84a,84b which are provided in opposite stroke end portions of said low-pressure piston 8l.
Claim 10
Dependent Claim
50 words
The ultra-high-pressure rotary water jet gun as claimed in claim l, characterised in that a substantially conical flexible cover member 25 provided with bellows 28 around its periphery is clamped between the front end portion of said housing l and the front end portion of said water supply tube l2.
Claim 11
Dependent Claim
38 words
l0. The ultra-high-pressure rotary water jet gun as claimed in claim l, characterised in that a flexible cover member 29 is provided outside said nozzle cartridge 2l mounted on the front end of said water supply tube l2.
Claim 12
Dependent Claim
31 words
The ultra-high-pressure rotary water jet gun as claimed in claim l, characterised in that said nozzle cartridge 2l is threadably connected with said front end of said water supply tube l2.
Claim 13
Dependent Claim
34 words
The ultra-high-pressure rotary water jet gun as claimed in claim l, characterised in that said nozzle cartridge 2l is provided with a plurality of nozzle tips 23 spaced apart from the central portion thereof.
Claim 14
Dependent Claim
118 words
The ultra-high-pressure rotary water jet gun as claimed in claim l, characterised in that said eccentric rotor 4 for moving said water supply tube l2 in an orbiting manner is provided with an axial hole 5 for receiving said water supply tube l2 so that a thin wall portion 6a and a biased wall portion 6b are formed in said eccentric rotor 4, and in the axially central portion of said biased wall portion 6b there is formed a thick wall portion 7 projecting outward from the outer periphery and forming a half cylinder with respect to the centre O of said eccentric rotor 4, while a notch portion 8 is provided in said thin wall portion 6a.
Claim 15
Dependent Claim
279 words
An ultra-high-pressure rotary water jet gun characterised by the combination of a housing l, an eccentric rotor 4 rotatably mounted therein; an axial hole 5 formed in said rotor 4 in an eccentric position with respect to the centre O of said rotor 4, a water supply tube l2 rotatably mounted in said axial hole 5, a nozzle cartridge 2l for ejecting ultra-high-pressure water mounted on the front end of said water supply tube l2, a hydraulic circuit 70 connected to the rear end of said tube l2 to supply ultra-high-pressure water to said nozzle cartridge 2l, said hydraulic circuit 70 being provided with an unloading circuit 76 which is provided with a pilot-operated directional control valve 74 for controlling a discharging line 75a in opening and closing manner, an air turbine 30 mounted in said housing l, a pneumatic circuit 6l,62,63,64 including pressurized air generating means which feeds pressurized air to said air turbine 30, and an output shaft 38 for said air turbine 30 connected to said eccentric rotor 4 to rotate the same: wherein said pneumatic circuit 6l,62,63,64 is provided with: a main air circuit Ql for connecting said air turbine 30 with said pressurized air generating means 6l: a pilot-operated master valve 68 interposed in said main air circuit Ql; and, a control air circuit Q2 branched off from said pneumatic circuit through which said master valve 68 is connected with said pressurized air generating means 6l, which control air circuit Q2 comprises: a first pilot line Pa for sending a pilot signal to said master valve 68; and, a second pilot line Pb for sending said pilot signal to operate said control valve 74.
Claim 16
Dependent Claim
279 words
An ultra-high-pressure rotary water jet gun characterised by the combination of a housing l, an eccentric rotor 4 rotatably mounted therein; an axial hole 5 formed in said rotor 4 in an eccentric position with respect to the centre O of said rotor 4, a water supply tube l2 rotatably mounted in said axial hole 5, a nozzle cartridge 2l for ejecting ultra-high-pressure water mounted on the front end of said water supply tube l2, a hydraulic circuit 70 connected to the rear end of said tube l2 to supply ultra-high-pressure water to said nozzle cartridge 2l, said hydraulic circuit 70 being provided with an unloading circuit 76 which is provided with a pilot-operated directional control valve 74 for controlling a discharging line 75a in opening and closing manner, an air turbine 30 mounted in said housing l, a pneumatic circuit 6l,62,63,64 including pressurized air generating means which feeds pressurized air to said air turbine 30, and an output shaft 38 for said air turbine 30 connected to said eccentric rotor 4 to rotate the same: wherein said pneumatic circuit 6l,62,63,64 is provided with: a main air circuit Ql for connecting said air turbine 30 with said pressurized air generating means 6l: a pilot-operated master valve 68 interposed in said main air circuit Ql; and, a control air circuit Q2 branched off from said pneumatic circuit through which said master valve 68 is connected with said pressurized air generating means 6l, which control air circuit Q2 comprises: a first pilot line Pa for sending a pilot signal to said master valve 68; and, a second pilot line Pb for sending said pilot signal to operate said control valve 74.
Claim 17
Dependent Claim
52 words
The ultra-high-pressure rotary water jet gun as claimed in claim l4, characterised in that said control air circuit Q2 is so constructed that said pilot signal is applied to operate said master valve 68 and said control valve through an air control device 60 which is actuated by an operating member 50.
Claim 18
Dependent Claim
43 words
The ultra-high-pressure rotary water jet gun as claimed in claim l5, characterisd in that said air control device 60 comprises; a pilot valve 67 actuated in combination with said operating member 50; and, a control valve 66b operated by said pilot valve 67.
References Cited (Backward Citations)
No citation records indexed.
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