US5664915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tap and method of making a tap with selected size limits
Assignee: Individual
•
Filing: 1996-03-22
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Granted: 1997-09-09
•
Expires: 2016-03-22
Abstract
Abstract A nib tap configuration in which the thread turns are of progressively increasing pitch diameter over a range of size limits associated with a standard basic pitch diameter. A particular size limit can be provided by grinding off the turns of a larger limit size. A family of taps covering an extended range of pitch diameter size limits allow selection over the extended range.
Inventors
- 👤 Terrence C. Hawke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:38
CPC Classifications
B; B23; B23G; B23G5/00; B23G5/02; B23G5/06; B23G2200/00; B23G2200/34; Y; Y10; Y10T; Y10T408/00; Y10T408/89; Y10T408/904; Y10T408/9046; Y10T408/90467; Y10T408/9048
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
109 words
A method of making a tap of a specific pitch diameter size limit in relation to a nominal tap size, comprising the steps of: forming a tap having a series of thread turns of a progressively increasing pitch diameter form, with a maximum pitch diameter at a thread turn nearest a shank end of said tap, said pitch diameters of said thread turn series defining a predetermined range of size limits with respect to said nominal pitch diameter, said range including said selected pitch diameter; grinding off as many turns as necessary to leave a thread form of a selected pitch diameter adjacent the shank end of said tap.
Claim 2
Independent Claim
109 words
A method of making a tap of a specific pitch diameter size limit in relation to a nominal tap size, comprising the steps of: forming a tap having a series of thread turns of a progressively increasing pitch diameter form, with a maximum pitch diameter at a thread turn nearest a shank end of said tap, said pitch diameters of said thread turn series defining a predetermined range of size limits with respect to said nominal pitch diameter, said range including said selected pitch diameter; grinding off as many turns as necessary to leave a thread form of a selected pitch diameter adjacent the shank end of said tap.
Claim 3
Dependent Claim
25 words
The method according to claim 1 wherein in said forming step, a series of thread turns extending through several GH number size limits are formed.
Claim 4
Independent Claim
109 words
A method of making a tap of any given pitch diameter size limit in relation to a nominal pitch diameter size, comprising the steps of: forming a family of taps, each tap in said family having a series of thread turns of progressively increasing pitch diameter to a maximum pitch diameter adjacent a tap shank, each tap in said family having thread turns extending over a portion of a range of pitch diameter limit sizes from the same nominal pitch diameter; selecting a tap from said family having said given pitch diameter limit size; and, grinding off any thread turns over said given pitch diameter on said selected tap.
Claim 5
Independent Claim
109 words
A method of making a tap of any given pitch diameter size limit in relation to a nominal pitch diameter size, comprising the steps of: forming a family of taps, each tap in said family having a series of thread turns of progressively increasing pitch diameter to a maximum pitch diameter adjacent a tap shank, each tap in said family having thread turns extending over a portion of a range of pitch diameter limit sizes from the same nominal pitch diameter; selecting a tap from said family having said given pitch diameter limit size; and, grinding off any thread turns over said given pitch diameter on said selected tap.
Claim 6
Independent Claim
72 words
A method of making a nib tap for threading nuts of a desired pitch diameter size limit relative to a nominal pitch diameter, comprising the steps of: forming a nib tap having a series of thread turns of progressively increasing pitch diameter to the rear of said tap, including said desired size, said series encompassing a range of pitch diameter limit sizes; and, grinding off thread turns larger than said desired size.
Claim 7
Independent Claim
72 words
A method of making a nib tap for threading nuts of a desired pitch diameter size limit relative to a nominal pitch diameter, comprising the steps of: forming a nib tap having a series of thread turns of progressively increasing pitch diameter to the rear of said tap, including said desired size, said series encompassing a range of pitch diameter limit sizes; and, grinding off thread turns larger than said desired size.
Claim 8
Dependent Claim
79 words
A set of taps comprising: a plurality of taps; each tap related to a single nominal pitch diameter size, each tap having a series of thread turns of progressively increasing pitch diameter, with a maximum pitch diameter adjacent a shank portion of said tap; each tap in said set having a unique pitch diameter range of size limits associated with said nominal pitch diameter, whereby a desired pitch diameter tap can be selected from a tap in said series.
Claim 9
Dependent Claim
79 words
A set of taps comprising: a plurality of taps; each tap related to a single nominal pitch diameter size, each tap having a series of thread turns of progressively increasing pitch diameter, with a maximum pitch diameter adjacent a shank portion of said tap; each tap in said set having a unique pitch diameter range of size limits associated with said nominal pitch diameter, whereby a desired pitch diameter tap can be selected from a tap in said series.
Claim 10
Dependent Claim
61 words
In a through tapping apparatus having a tap driver allowing nuts to progress onto said driver and a nib tap driven by said driver, the improvement comprising: progressively increasing pitch diameter of thread turns on said tap at the turns adjacent the shank of said tap, said increasing pitch diameter thread turns extending over a range of pitch diameter size limits.
Claim 11
Dependent Claim
61 words
In a through tapping apparatus having a tap driver allowing nuts to progress onto said driver and a nib tap driven by said driver, the improvement comprising: progressively increasing pitch diameter of thread turns on said tap at the turns adjacent the shank of said tap, said increasing pitch diameter thread turns extending over a range of pitch diameter size limits.
Claim 12
Dependent Claim
73 words
A thread cutting tap comprising: an elongate body formed with a shank at a rear end, and a chamfered section at a front end; a series of full form cutting threads extending rearwardly from said chamfered section to said shank; said full form thread series of progressively increasing pitch diameter from said chamfer section to said shank, said pitch diameters of a size limit range relating to a standard basic pitch diameter size.
Claim 13
Dependent Claim
73 words
A thread cutting tap comprising: an elongate body formed with a shank at a rear end, and a chamfered section at a front end; a series of full form cutting threads extending rearwardly from said chamfered section to said shank; said full form thread series of progressively increasing pitch diameter from said chamfer section to said shank, said pitch diameters of a size limit range relating to a standard basic pitch diameter size.
Claim 14
Dependent Claim
26 words
The tap according to claim 7 wherein said progressively increasing pitch diameter of said full form cutting threads form a taper of less than about 1/100.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-09-08 | 2001-03-10 | 2001-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-09-08 | 2005-03-10 | 2005-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-09-08 | 2009-03-10 | 2009-09-09 | $7700.00 | Window Closed / Lapsed |