Patent US3509629A successfully refreshed from Google Patents.
US4778730A
Expired / Lapsed
US
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Method of applying non-slip coating to tools and resulting product
Assignee: REMGRIT Corp 939 BARNUM AVE BRIDGEPORT CT A CORP OF SOUTH CAROLINA
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Filing: 1987-09-09
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Granted: 1988-10-18
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Expires: 2007-09-09
Abstract
Abstract The working surface of a tool such as the tip of a screwdriver is provided with a non-slip coating by means of hard abrasive particles which are bonded to the tool with a brazing alloy.
Inventors
- 👤 Jerry Zucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:44
CPC Classifications
B; B25; B25B; B25B23/00; B25B23/02; B25B23/08; B25B23/10; B22; B22F; B22F7/00; B22F7/06; B22F7/08; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/32; B23K35/327; B25B13/00; B25B13/10; B25B13/12; B25B15/00; B25B15/001; B25B15/002; B25B7/00; B25B7/02; Y; Y10; Y10S; Y10S81/00; Y10S81/90; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12049; Y10T428/12056
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
89 words
A tool having an antislip surface on a working element thereof, said antislip surface comprising a coating of diamond-like grit particles having a particle size of from about 0.003 to about 0.010 inches, and a metallic brazing material bonding said grit particles to said element, said element having a reduced dimension for accommodating the thickness of said coating it the order of from about 0.004 to about 0.015 inches, with more than 35 percent of the volume of said particles being surrounded and supported by said metallic brazing material.
Claim 2
Dependent Claim
89 words
A tool having an antislip surface on a working element thereof, said antislip surface comprising a coating of diamond-like grit particles having a particle size of from about 0.003 to about 0.010 inches, and a metallic brazing material bonding said grit particles to said element, said element having a reduced dimension for accommodating the thickness of said coating it the order of from about 0.004 to about 0.015 inches, with more than 35 percent of the volume of said particles being surrounded and supported by said metallic brazing material.
Claim 3
Dependent Claim
73 words
A tool having an antislip surface on a working element thereof, said antislip surface comprising a coating of diamond-like grit particles having a particle size of from about 0.003 to about 0.010 inches, and a high temperature metallic brazing alloy containing more than 40% cobalt or nickel bonding said grit particles to said element, with more than 35% of the volume of said particles being surrounded and supported by said metallic brazing alloy.
Claim 4
Dependent Claim
73 words
A tool having an antislip surface on a working element thereof, said antislip surface comprising a coating of diamond-like grit particles having a particle size of from about 0.003 to about 0.010 inches, and a high temperature metallic brazing alloy containing more than 40% cobalt or nickel bonding said grit particles to said element, with more than 35% of the volume of said particles being surrounded and supported by said metallic brazing alloy.
Claim 5
Dependent Claim
14 words
The non-slip tool of claim 2 wherein said abrasive particles are metal carbide particles.
Claim 6
Dependent Claim
12 words
The non-slip tool of claim 3 wherein said particles are tungsten carbide.
Claim 7
Dependent Claim
20 words
The non-slip tool of claim 2 wherein the average size of the particles is less then 0.012 inches in diameter.
Claim 8
Dependent Claim
21 words
The non-slip tool of claim 2 wherein the abrasive particles are present on said working element in substantially a single layer.
Claim 9
Dependent Claim
12 words
The non-slip tool of claim 15 wherein said tool is a screwdriver.
Claim 10
Dependent Claim
45 words
The non-slip tool of claim 2 wherein said tool is a screwdriver having a tip of less than standard dimensions, and said metallurgical bond and abrasive particles are applied to said tip and are sufficiently thick to render said tip substantially equal to standard dimensions.
Claim 11
Dependent Claim
30 words
The non-slip tool of claim 2 wherein said tool comprises a wrench, and said working element comprises opposed jaws, said abrasive particles being applied to the surfaces of said jaws.
Claim 12
Dependent Claim
111 words
Method of applying a non-slip coating to the working surfaces of a screwdriver comprising the steps of providing an alloy steel screwdriver with a tip having dimensions less than standard dimensions, adhering a layer of a mixture of abrasive particles and particles of a brazing alloy to said tip, the thickness of said layer being sufficient to provide dimensions on said tip substantially equal to standard dimensions, the size of said abrasive particles being in the order of 0.003 to 0.010 inches, and heating the applied layer at a temperature sufficient to cause bonding of said brazing alloy between said tip and said abrasive particles projecting from said fused brazing alloy.
Claim 13
Dependent Claim
111 words
Method of applying a non-slip coating to the working surfaces of a screwdriver comprising the steps of providing an alloy steel screwdriver with a tip having dimensions less than standard dimensions, adhering a layer of a mixture of abrasive particles and particles of a brazing alloy to said tip, the thickness of said layer being sufficient to provide dimensions on said tip substantially equal to standard dimensions, the size of said abrasive particles being in the order of 0.003 to 0.010 inches, and heating the applied layer at a temperature sufficient to cause bonding of said brazing alloy between said tip and said abrasive particles projecting from said fused brazing alloy.
Claim 14
Dependent Claim
15 words
The tool of claim 1 wherein the diamond-like grit particles are comprised of tungsten carbide.
Claim 15
Dependent Claim
17 words
The tool of claim 1 wherein the metallic brazing alloy contains more than 40% cobalt or nickel.
Claim 16
Dependent Claim
16 words
The tool of claim 1 wherein the working element of said tool comprises opposed gripping surfaces.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-18 | 1992-04-18 | 1992-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-18 | 1996-04-18 | 1996-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-18 | 2000-04-18 | 2000-10-18 | $7700.00 | Window Closed / Lapsed |