IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0674968
(2000-11-07)
|
우선권정보 |
DE-0043642 (1998-09-23) |
국제출원번호 |
PCT/EP99/05937
(1999-08-13)
|
국제공개번호 |
WO00/16948
(2000-03-30)
|
발명자
/ 주소 |
- Berger, Rudolf
- Schmid, Wolfgang
|
출원인 / 주소 |
- Wacker Construction Equipment AG
|
대리인 / 주소 |
Boyle Fredrickson Newholm Stein & Gratz S.C.
|
인용정보 |
피인용 횟수 :
12 인용 특허 :
8 |
초록
▼
A pneumatic percussion power tool has a percussion tool housing in which a drive piston and a percussion piston are movable in an axial direction. The motion of the drive piston, which is generated by a crank mechanism, is transmitted to the percussion piston through a pneumatic spring in a first ch
A pneumatic percussion power tool has a percussion tool housing in which a drive piston and a percussion piston are movable in an axial direction. The motion of the drive piston, which is generated by a crank mechanism, is transmitted to the percussion piston through a pneumatic spring in a first chamber so that the percussion piston cyclically strikes a ram or a tool. The backward motion of the percussion piston rebounding from the ram is supported by increasing air pressure in a third chamber that is supplied with air by the drive piston through a second chamber and a communicating channel.
대표청구항
▼
A pneumatic percussion power tool has a percussion tool housing in which a drive piston and a percussion piston are movable in an axial direction. The motion of the drive piston, which is generated by a crank mechanism, is transmitted to the percussion piston through a pneumatic spring in a first ch
A pneumatic percussion power tool has a percussion tool housing in which a drive piston and a percussion piston are movable in an axial direction. The motion of the drive piston, which is generated by a crank mechanism, is transmitted to the percussion piston through a pneumatic spring in a first chamber so that the percussion piston cyclically strikes a ram or a tool. The backward motion of the percussion piston rebounding from the ram is supported by increasing air pressure in a third chamber that is supplied with air by the drive piston through a second chamber and a communicating channel. surface of said brush body, said one or more brushes being sized to contact the internal surface of said casing whenever said assembly is being pumped down the interior of said string of oilfield casing; and an elastomeric cement plug connected to said brush body, said elastomeric cement plug being sized to swab the internal surface of said casing whenever said assembly is being pumped down the interior of said string of oilfield casing. 10. The assembly according to claim 9, wherein said brush body consisted of a material selected from the class of high density polyurethane, high density polyethylene, high density polypropylene, nylon, synthetic fiber-forming polymers and copolymers of acrylic acid or its derivatives, carbon fiber and high density urethane, high density plastic, phenolic resin-based materials, aluminum, and wood, and combinations thereof. 11. The assembly according to claim 9, wherein said brush body comprises polyurethane having a density of greater than ten pounds per cubic foot. 12. The assembly according to claim 9, wherein said brush body comprises polyurethane having a density of at least twelve pounds per cubic foot. 13. A method of cleaning the internal surface of a string of oilfield casing having a given internal diameter at least partially cemented in an earth borehole, comprising: pumping an assembly within the interior of said casing down to a predetermined depth in said earth borehole, said assembly comprising: a brush body comprised of a rigid material; one or more brushes located on, near or within the external surface of said brush body, said one or more brushes being sized to contact the internal surface of said casing whenever said assembly is being pumped down the interior of said string of oilfield casing; and an elastomeric cement plug connected to said brush body, said elastomeric cement plug being sized to swab the internal surface of said casing whenever said assembly is being pumped down the interior of said string of oilfield casing. 14. The assembly according to claim 13, wherein said brush body consists of a material selected from the class of high density polyurethane, high density polyethylene, high density polypropylene, nylon, synthetic fiber-forming polymers and copolymers of acrylic acid or its derivatives, carbon fiber and high density urethane, high density plastic, phenolic resin-based materials, aluminum, and wood, and combinations thereof. 15. The assembly according to claim 13, wherein said brush body comprises polyurethane having a density of greater than ten pounds per cubic foot. 16. The assembly according to claim 13, wherein said brush body comprises polyurethane having a density of at least twelve pounds per cubic foot. 17. An assembly for pumping down within the interior of a string of oilfield casing having a given internal diameter, to clean out the debris located within such string of casing, comprising: at least one brush body comprised of an incompressible material; one or more brushes located on, near, or within the external surface of each of said at least one brush body, said one or more brushes being sized to contact the internal surface of said casing whenever said assembly is being pumped down the interior of said string of oilfield casing; and at least one elastomeric cement plug connected, respectively, to each of said at least one brush body, said elastomeric cement plug or plugs being sized to swab the internal surface of said casing whenever said assembly is being pumped down the interior of said string of oilfield casing. 18. The assembly according to claim 17, wherein said brush body or bodies consists of a material selected from the class of high density polyurethane, high density polyethylene, high density polypropylene, nylon, synthetic fiber-forming polymers and copolymers of acrylic acid or its derivatives, carbon fiber and high density urethane, high density plastic, phenolic resin-based materials, hard rubber, alumin um, and wood, and combinations thereof. 19. The assembly according to claim 17, wherein said brush body or bodies each comprises polyurethane having a density of greater than ten pounds per cubic foot. 20. The assembly according to claim 17, wherein said brush body or bodies each comprises polyurethane having a density of at least twelve pounds per cubic foot. 21. An assembly for pumping down within the interior of a string of oilfield casing having a given internal diameter, to clean out the debris located within such string of casing, comprising: at least one brush body comprised of a rigid material; one or more brushes located on, near, or within the external surface of each of said at least one brush body, said one or more brushes being sized to contact the internal surface of said casing whenever said assembly is being pumped down the interior of said string of oilfield casing; and at least one elastomeric cement plug connected, respectively, to each of said at least one brush body, said elastomeric cement plug or plugs being sized to swab the internal surface of said casing whenever said assembly is being pumped down the interior of said string of oilfield casing. 22. The assembly according to claim 21, wherein said brush body or bodies each consists of a material selected from the class of high density polyurethane, high density polyethylene, high density polypropylene, nylon, synthetic fiber-forming polymers and copolymers of acrylic acid or its derivatives, carbon fiber and high density urethane, high density plastic, phenolic resin-based materials, aluminum, and wood, and combinations thereof. 23. The assembly according to claim 21, wherein said brush body or bodies each comprises polyurethane having a density of greater than ten pounds per cubic foot. 24. The assembly according to claim 21, wherein said brush body or bodies each comprises polyurethane having a density of at least twelve pounds per cubic foot.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.