Patent US3869747A successfully refreshed from Google Patents.
US3869747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor piston tube cleaner
Assignee: Individual
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Filing: 1973-06-25
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Granted: 1975-03-11
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Expires: 1993-06-25
Abstract
Abstract A motor piston tube cleaner for providing controlled reciprocating and rotary action externally of its self-contained cylinder housing. A coaxial vane or turbine displacement type rotor is incorporated in the piston, the energy source for the motor piston can be a fluid such as water, gas or steam. The device is used for drilling, cleaning or brushing the interior of various sizes of tubes used in coolers, condensers, heat exchangers, reactors, boilers, etc., plus many other applications such as for drilling long holes in materials such as cement or plastics, for example.
Inventors
- 👤 Harold L Richter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:38
CPC Classifications
F; F28; F28G; F28G15/00; F28G15/04; B; B08; B08B; B08B9/00; B08B9/02; B08B9/027; B08B9/032; B08B9/0321; B08B9/0323; B08B9/04; B08B9/043; B08B9/0433; B23; B23B; B23B45/00; B23B45/04; B23P; B23P19/00; B23P19/02; B23P19/022; B23Q; B23Q5/00; B23Q5/02; B23Q5/04; B23Q5/06; B23Q5/22; B23Q5/26
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
255 words
A device for driving a tool carrying drill shaft for drilling elongated holes or for drilling, cleaning or brushing the interiors of tubes of the nature contained in heat exchangers, coolers, condensers, etc., comprising: A. an elongated barrel defining a column having a first end and a second end and including, 1. first and second end caps, said barrel having a port adjacent each of the opposite ends, said second end cap having an opening; B. a piston for reciprocating movement in said barrel between the end caps including, 1. motor means fixed within said piston, and means to supply drive fluid to the motor means and to provide exit means for the drive fluid including port means extending in fluid communication through said piston and means exteriorly of the barrel to provide fluid communication means between the ports adjacent the opposite ends; C. a drill shaft rotatably attached to a rotor shaft extending outwardly from said motor, said drill shaft extending through the opening of said second end cap for the detachable reception of a tool on its extended end, outwardly of said second end cap; D. a fluid power means; E. conduit means; F. four-way valve means connected in said conduit means for selectively directing said fluid power means through said ports adjacent each of the opposite ends into corresponding end portions of said barrel to cause reciprocating movement of said motor carrying piston within said barrel and to simultaneously energize said motor to cause rotary movement of said tool carrying drill shaft.
Claim 2
Independent Claim
255 words
A device for driving a tool carrying drill shaft for drilling elongated holes or for drilling, cleaning or brushing the interiors of tubes of the nature contained in heat exchangers, coolers, condensers, etc., comprising: A. an elongated barrel defining a column having a first end and a second end and including, 1. first and second end caps, said barrel having a port adjacent each of the opposite ends, said second end cap having an opening; B. a piston for reciprocating movement in said barrel between the end caps including, 1. motor means fixed within said piston, and means to supply drive fluid to the motor means and to provide exit means for the drive fluid including port means extending in fluid communication through said piston and means exteriorly of the barrel to provide fluid communication means between the ports adjacent the opposite ends; C. a drill shaft rotatably attached to a rotor shaft extending outwardly from said motor, said drill shaft extending through the opening of said second end cap for the detachable reception of a tool on its extended end, outwardly of said second end cap; D. a fluid power means; E. conduit means; F. four-way valve means connected in said conduit means for selectively directing said fluid power means through said ports adjacent each of the opposite ends into corresponding end portions of said barrel to cause reciprocating movement of said motor carrying piston within said barrel and to simultaneously energize said motor to cause rotary movement of said tool carrying drill shaft.
Claim 3
Independent Claim
51 words
A device for driving a tool carrying drill shaft for drilling elongated holes or for drilling, cleaning or brushing the interiors of tubes of the nature contained in heat exchangers, coolers, condensers, etc., comprising: A. an elongated barrel defining a column having a first end and a second end and including,
Claim 4
Independent Claim
51 words
A device for driving a tool carrying drill shaft for drilling elongated holes or for drilling, cleaning or brushing the interiors of tubes of the nature contained in heat exchangers, coolers, condensers, etc., comprising: A. an elongated barrel defining a column having a first end and a second end and including,
Claim 5
Dependent Claim
37 words
first and second end caps, said barrel having a port adjacent each of the opposite ends, said second end cap having an opening; B. a piston for reciprocating movement in said barrel between the end caps including,
Claim 6
Dependent Claim
37 words
first and second end caps, said barrel having a port adjacent each of the opposite ends, said second end cap having an opening; B. a piston for reciprocating movement in said barrel between the end caps including,
Claim 7
Dependent Claim
165 words
motor means fixed within said piston, and means to supply drive fluid to the motor means and to provide exit means for the drive fluid including port means extending in fluid communication through said piston and means exteriorly of the barrel to provide fluid communication means between the ports adjacent the opposite ends; C. a drill shaft rotatably attached to a rotor shaft extending outwardly from said motor, said drill shaft extending through the opening of said second end cap for the detachable reception of a tool on its extended end, outwardly of said second end cap; D. a fluid power means; E. conduit means; F. four-way valve means connected in said conduit means for selectively directing said fluid power means through said ports adjacent each of the opposite ends into corresponding end portions of said barrel to cause reciprocating movement of said motor carrying piston within said barrel and to simultaneously energize said motor to cause rotary movement of said tool carrying drill shaft.
Claim 8
Dependent Claim
165 words
motor means fixed within said piston, and means to supply drive fluid to the motor means and to provide exit means for the drive fluid including port means extending in fluid communication through said piston and means exteriorly of the barrel to provide fluid communication means between the ports adjacent the opposite ends; C. a drill shaft rotatably attached to a rotor shaft extending outwardly from said motor, said drill shaft extending through the opening of said second end cap for the detachable reception of a tool on its extended end, outwardly of said second end cap; D. a fluid power means; E. conduit means; F. four-way valve means connected in said conduit means for selectively directing said fluid power means through said ports adjacent each of the opposite ends into corresponding end portions of said barrel to cause reciprocating movement of said motor carrying piston within said barrel and to simultaneously energize said motor to cause rotary movement of said tool carrying drill shaft.
Claim 9
Dependent Claim
24 words
The device as defined in claim 1 wherein said motor is fixed within a sleeve which is carried in axial alignment within said piston.
Claim 10
Dependent Claim
46 words
The device as defined in claim 2 wherein said piston is comprised of a stack of compressible piston torque washers in the area of said sleeve and first and second stacks of compressible piston seal washers extending outwardly from opposed ends of said piston torque washers.
Claim 11
Dependent Claim
41 words
The device as defined in claim 1 including bearing means, extending through said piston, to rotatably journal said rotor shaft from said motor, said rotor shaft being fixed at its outer, extended end to the inner end of said drill shaft.
Claim 12
Dependent Claim
60 words
The device as defined in claim 4 including a pair of adjustment nuts, screw threaded respectively onto the opposed outer ends of first and second fittings, attached to the opposed ends of said sleeve, said first fitting providing a through opening comprising said inlet port means and said second fitting providing an inner axially extending bushing comprising said bearing means.
Claim 13
Dependent Claim
62 words
The device as defined in claim 5 wherein each washer of said first and second stacks of piston seal washers is annularly beveled, said pair of adjustment nuts normally being engaged against the respective outer ends thereof whereby the compression forces against both of said stacks of piston seal washers and said stack of piston torque washers, disposed therebetween, can be adjusted.
Claim 14
Dependent Claim
39 words
The device as defined in claim 4 including a fluid exhaust chamber in said sleeve, between said motor and second fitting, and relatively small exhaust ports opening from said exhaust chamber through the wall of said tubular rotor shaft.
Claim 15
Dependent Claim
35 words
The device as defined in claim 7 wherein the interior of said tubular drive shaft communicates between said tubular rotor shaft and fluid exhaust port means in the tool holding end of said drill shaft.
Claim 16
Dependent Claim
72 words
The device as defined in claim 1 wherein said conduit means comprises a first conduit to direct said fluid drive means from a source of supply to said four-way valve, second and third conduit means to selectively direct said fluid drive means from said four-way valve, respectively, through said first or second end cap into the corresponding end portion of said barrel and a fourth, exhaust conduit connecting to said four-way valve.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |