NL7714592A - AIR-POWERED BOTTOM RACQUET. - Google Patents

AIR-POWERED BOTTOM RACQUET.

Info

Publication number: NL7714592A
Authority: NL; Netherlands
Prior art keywords: racquet; air; powered bottom; powered; bottom racquet
Prior art date: 1977-11-04

Application number

NL7714592A

Other languages

Dutch (nl)

Original Assignee

Mathieu Joseph Winter

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1977-11-04

Filing date

1977-12-30

Publication date

1979-05-08

1977-12-30 Application filed by Mathieu Joseph Winter filed Critical Mathieu Joseph Winter

1979-05-08 Publication of NL7714592A publication Critical patent/NL7714592A/en

Links

Classifications

- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/06—Down-hole impacting means, e.g. hammers
- E21B4/14—Fluid operated hammers
- E21B4/145—Fluid operated hammers of the self propelled-type, e.g. with a reverse mode to retract the device from the hole

Landscapes

Engineering & Computer Science (AREA)
Life Sciences & Earth Sciences (AREA)
Geology (AREA)
Mining & Mineral Resources (AREA)
Mechanical Engineering (AREA)
Physics & Mathematics (AREA)
Environmental & Geological Engineering (AREA)
Fluid Mechanics (AREA)
General Life Sciences & Earth Sciences (AREA)
Geochemistry & Mineralogy (AREA)
Earth Drilling (AREA)
Actuator (AREA)

NL7714592A 1977-11-04 1977-12-30 AIR-POWERED BOTTOM RACQUET. NL7714592A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
AT790877		1977-11-04

Publications (1)

Publication Number	Publication Date
NL7714592A true NL7714592A (en)	1979-05-08

Family

ID=3600635

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NL7714592A NL7714592A (en)	1977-11-04	1977-12-30	AIR-POWERED BOTTOM RACQUET.

Country Status (6)

Country	Link
BE (1)	BE861182A (en)
DE (2)	DE7800027U1 (en)
ES (1)	ES466320A1 (en)
FR (1)	FR2408016A1 (en)
IT (1)	IT1091744B (en)
NL (1)	NL7714592A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
SU1250619A1 (en) *	1984-03-06	1986-08-15	Институт Горного Дела Со Ан Ссср	Reversible pneumatic device for making holes in soil
CH680937A5 (en) *	1989-01-12	1992-12-15	Terra Ag Tiefbautechnik
US5172771A (en) *	1990-11-06	1992-12-22	Charles Machine Works, Inc.	Reversible impact-operated boring tool

1977
- 1977-11-25 BE BE2056459A patent/BE861182A/en unknown
- 1977-12-30 NL NL7714592A patent/NL7714592A/en not_active Application Discontinuation
1978
- 1978-01-02 DE DE7800027U patent/DE7800027U1/en not_active Expired
- 1978-01-02 DE DE19782800050 patent/DE2800050A1/en active Pending
- 1978-01-09 FR FR7800451A patent/FR2408016A1/en not_active Withdrawn
- 1978-01-11 IT IT19162/78A patent/IT1091744B/en active
- 1978-01-25 ES ES466320A patent/ES466320A1/en not_active Expired

Also Published As

Publication number	Publication date
FR2408016A1 (en)	1979-06-01
IT7819162A0 (en)	1978-01-11
BE861182A (en)	1978-05-25
DE7800027U1 (en)	1978-04-20
ES466320A1 (en)	1979-01-16
IT1091744B (en)	1985-07-06
DE2800050A1 (en)	1979-05-10

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NL7714592A (en)	1979-05-08	AIR-POWERED BOTTOM RACQUET.
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Legal Events

Date	Code	Title	Description
1979-05-25	A1B	A search report has been drawn up
1981-08-03	BV	The patent application has lapsed