Patent US4780030A successfully refreshed from Google Patents.
US4780030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manual tap guide
Assignee: Individual
•
Filing: 1987-08-03
•
Granted: 1988-10-25
•
Expires: 2007-08-03
Abstract
Abstract A manual tap guide having a base member which includes a drawer and a stiffening member for stiffening the base, a vertical upright, a horizontal support bar, and an arbor is shown and described. In this vertical tap guide, the arbor is rotated by hand, and may be positioned to any location on the table by means of adjustment of the horizontal support bar with respect to the vertical support.
Inventors
- 👤 Andrew Zudall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:29
CPC Classifications
B; B23; B23G; B23G1/00; B23G1/44; B23G1/48; B23G2210/00; B23G2210/04; Y; Y10; Y10T; Y10T408/00; Y10T408/55; Y10T408/561; Y10T408/5612; Y10T408/91; Y10T408/96
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
160 words
A manually operable thread tapping tool for cutting an accurate thread in a hole of a work piece, said tool comprising a base, a vertical upright member mounted on said base, a horizontal arm adjustably mounted on said vertical upright member, a sliding block adjustably mounted on said horizontal arm having a vertical opening and a lock screw for holding said block in a fixed position on said horizontal arm, an arbor mounted on said vertical opening in said sliding block, a crank arm mounted on said arm, and a tap holding means mounted on the arbor, wherein said arbor is free for vertical sliding movement and rotational movement about its axis, and wherein said base is constructed of a sheet metal which is reinforced with a first stiffening block which runs through the location of said vertical upright member and said base if further reinforced and stiffened by a drawer member which slides into and out of said base.
Claim 2
Dependent Claim
160 words
A manually operable thread tapping tool for cutting an accurate thread in a hole of a work piece, said tool comprising a base, a vertical upright member mounted on said base, a horizontal arm adjustably mounted on said vertical upright member, a sliding block adjustably mounted on said horizontal arm having a vertical opening and a lock screw for holding said block in a fixed position on said horizontal arm, an arbor mounted on said vertical opening in said sliding block, a crank arm mounted on said arm, and a tap holding means mounted on the arbor, wherein said arbor is free for vertical sliding movement and rotational movement about its axis, and wherein said base is constructed of a sheet metal which is reinforced with a first stiffening block which runs through the location of said vertical upright member and said base if further reinforced and stiffened by a drawer member which slides into and out of said base.
Claim 3
Dependent Claim
15 words
The apparatus in accordance with claim 1 wherein said stiffening block is a non-metallic member.
Claim 4
Dependent Claim
20 words
The apparatus in accordance with claim 1 wherein said base has a first U-shaped member having ends which extend downward.
Claim 5
Dependent Claim
36 words
The apparatus in accordance with claim 3 wherein said base includes a second U-shaped member mounted within said first U-shaped member and wherein a rectilinear drawer opening is formed between said first and second U-shaped members.
Claim 6
Dependent Claim
25 words
The apparatus in accordance with claim 4 wherein said second U-shaped member is secured by its legs to the legs of said first U-shaped member.
Claim 7
Dependent Claim
40 words
The apparatus in accordance with claim 4 wherein said rectilinear opening has said first stiffening block filling a portion of the area between said U-shaped members through which a means for securing said vertical upright member to said base passes.
Claim 8
Dependent Claim
13 words
The apparatus in accordance with claim 1 where in said drawer is nonmetallic.
Claim 9
Dependent Claim
20 words
The apparatus in accordance with claim 1 wherein said drawer and said first block are constructed of particle chip board.
Claim 10
Dependent Claim
16 words
The apparatus in accordance with claim 2 wherein said non-metallic stiffening block is constructed of plywood.
Claim 11
Dependent Claim
17 words
The apparatus in accordance with claim 1 wherein said drawer is constructed of a stiff plastic material.
Claim 12
Dependent Claim
23 words
The apparatus in accordance with claim 1 wherein said drawer includes at least one recession in its upper surface for holding spare taps.
Claim 13
Dependent Claim
29 words
The apparatus in accordance with claim 4 wherein said U-shaped members are secured to each other by self-tapping metal screws extending through the side members of said U-shaped members.
Claim 14
Dependent Claim
20 words
The apparatus in accordance with claim 1 wherein said sliding block includes a bearing surface through which said arbor passes.
Claim 15
Dependent Claim
42 words
The apparatus in accordance with claim 1 wherein said drawer is monolithic and has an extension which projects beyond the edge of said base when the drawer is all of the way in against a stop formed by said first stiffening member.
Claim 16
Dependent Claim
31 words
The apparatus in accordance with claim 14 wherein said extension is formed by a groove cut in said drawer member and running from one side to the other of said drawer.
Claim 17
Dependent Claim
22 words
The apparatus in accordance with claim 15 wherein there is a groove on the bottom and the top of said drawer member.
Claim 18
Dependent Claim
19 words
The apparatus in accordance with claim 1 wherein said first stiffening block is thicker than said stiffening drawer member.
Claim 19
Dependent Claim
37 words
The apparatus in accordance with claim 1 wherein said horizontal arm is a drawn aluminum channel having a slot cut along a portion of its length for receiving a means for holding said block on said arm.
Claim 20
Dependent Claim
27 words
The apparatus in accordance with claim 1 wherein said drawer is constructed of a monolithic material such as particle chip board, plywood, or a stiff plastic material
References Cited (Backward Citations)
US393511A
Cited
US672284A
Cited
US804869A
Cited
US889273A
Cited
US1693129A
Cited
FR881606A
Cited
US2309777A
Cited
US2336947A
Cited
US2413677A
Cited
US3267501A
Cited
DE2703367A1
Cited
US4265283A
Cited
DE3326360A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-25 | 1992-04-25 | 1992-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-25 | 1996-04-25 | 1996-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-25 | 2000-04-25 | 2000-10-25 | $7700.00 | Window Closed / Lapsed |