GB2212422B - Rotary bits - Google Patents

Rotary bits

Info

Publication number: GB2212422B
Authority: GB; United Kingdom
Prior art keywords: rotary bits; bits; rotary
Prior art date: 1987-11-17
Legal status (The legal status 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 status listed.): Expired - Lifetime

Application number

GB8826577A

Other versions

GB8826577D0 (en

GB2212422A (en

Inventor

John Hammond

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Individual

Original Assignee

Individual

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.)

1987-11-17

Filing date

1988-11-14

Publication date

1992-01-22

1987-11-17 Priority claimed from GB878726909A external-priority patent/GB8726909D0/en

1988-02-26 Priority claimed from GB888804485A external-priority patent/GB8804485D0/en

1988-11-14 Application filed by Individual filed Critical Individual

1988-12-21 Publication of GB8826577D0 publication Critical patent/GB8826577D0/en

1989-07-26 Publication of GB2212422A publication Critical patent/GB2212422A/en

1992-01-22 Application granted granted Critical

1992-01-22 Publication of GB2212422B publication Critical patent/GB2212422B/en

2008-11-14 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Classifications

- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/0081—Conical drills

Landscapes

Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
Earth Drilling (AREA)

GB8826577A 1987-11-17 1988-11-14 Rotary bits Expired - Lifetime GB2212422B (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
GB878726909A GB8726909D0 (en)	1987-11-17	1987-11-17	Rotary bits
GB888804485A GB8804485D0 (en)	1988-02-26	1988-02-26	Rotary bits

Publications (3)

Publication Number	Publication Date
GB8826577D0 GB8826577D0 (en)	1988-12-21
GB2212422A GB2212422A (en)	1989-07-26
GB2212422B true GB2212422B (en)	1992-01-22

Family

ID=26293056

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
GB8826577A Expired - Lifetime GB2212422B (en)	1987-11-17	1988-11-14	Rotary bits

Country Status (1)

Country	Link
GB (1)	GB2212422B (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB1197952A (en) *	1967-02-23	1970-07-08	Marconi Co Ltd	Improvements in or relating to Hole Boring Tools
GB2029288A (en) *	1978-09-01	1980-03-19	Deutsch Fastener Corp	Tapered hole cutter
GB2050214A (en) *	1979-05-25	1981-01-07	Rothenberger Gmbh Co	A piercing tool
WO1983003563A1 (en) *	1982-04-16	1983-10-27	Skidmore, Michael, L.	Drill bit for fiber reinforced plastics
US4480952A (en) *	1981-10-05	1984-11-06	Jeremias Robert W	Non-burring drill for composite materials
EP0174089A2 (en) *	1984-08-09	1986-03-12	AMERICAN SAW & MFG. COMPANY	Stepped drill construction

1988
- 1988-11-14 GB GB8826577A patent/GB2212422B/en not_active Expired - Lifetime

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB1197952A (en) *	1967-02-23	1970-07-08	Marconi Co Ltd	Improvements in or relating to Hole Boring Tools
GB2029288A (en) *	1978-09-01	1980-03-19	Deutsch Fastener Corp	Tapered hole cutter
GB2050214A (en) *	1979-05-25	1981-01-07	Rothenberger Gmbh Co	A piercing tool
US4480952A (en) *	1981-10-05	1984-11-06	Jeremias Robert W	Non-burring drill for composite materials
WO1983003563A1 (en) *	1982-04-16	1983-10-27	Skidmore, Michael, L.	Drill bit for fiber reinforced plastics
EP0174089A2 (en) *	1984-08-09	1986-03-12	AMERICAN SAW & MFG. COMPANY	Stepped drill construction

Also Published As

Publication number	Publication date
GB8826577D0 (en)	1988-12-21
GB2212422A (en)	1989-07-26

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Legal Events

Date	Code	Title	Description
1994-11-09	746	Register noted 'licences of right' (sect. 46/1977)	Effective date: 19941011
1998-07-01	PCNP	Patent ceased through non-payment of renewal fee	Effective date: 19971114