Patent US4819337A successfully refreshed from Google Patents.
US4819337A
Expired / Lapsed
US
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Chalk line marking device
Assignee: Individual
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Filing: 1987-12-07
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Granted: 1989-04-11
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Expires: 2007-12-07
Abstract
Abstract A carpenter' chalk marking device for producing marks at regular intervals along a straight line upon a working surface, characterized by chalk marking units mounted along a chalk line and configured to hold the line from contact with the marking surface to prevent extraneous marks. The device also includes a chalk containing canister with a storage spool for the chalk line.
Inventors
- 👤 Tim I. Noyes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:24
CPC Classifications
B; B44; B44D; B44D3/00; B44D3/38
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
154 words
A chalk line marking device for producing marks at preselected intervals along a working surface, said device comprising: a flexible cord generally resistant to the retention of chalk dust; a multiplicity of rigid chalk dust retaining units affixed at intervals along the cord, each unit extending perpendicularly from the cord and including chalk dust retaining material, of which only portions substantially distant from the cord are exposed, so that the flexible cord tends to be prevented from contacting the working surface during use of the device; wherein each chalk dust retaining unit comprises a pair of rigid, chalk resistant washers radially outstanding from the flexible cord; and a washer of chalk retaining material sandwiched between the rigid washers and extending at least to all points of the peripheries thereof, so as to contact the working surface when the cord is stretched thereon for use, and to hold the cord away from said working surface.
Claim 2
Dependent Claim
154 words
A chalk line marking device for producing marks at preselected intervals along a working surface, said device comprising: a flexible cord generally resistant to the retention of chalk dust; a multiplicity of rigid chalk dust retaining units affixed at intervals along the cord, each unit extending perpendicularly from the cord and including chalk dust retaining material, of which only portions substantially distant from the cord are exposed, so that the flexible cord tends to be prevented from contacting the working surface during use of the device; wherein each chalk dust retaining unit comprises a pair of rigid, chalk resistant washers radially outstanding from the flexible cord; and a washer of chalk retaining material sandwiched between the rigid washers and extending at least to all points of the peripheries thereof, so as to contact the working surface when the cord is stretched thereon for use, and to hold the cord away from said working surface.
Claim 3
Dependent Claim
23 words
The device of claim 1, wherein: each of the rigid washers is secured as a flange to a sleeve affixed about the cord.
Claim 4
Dependent Claim
20 words
The device of claim 2, wherein the cord comprises a metallic wire core covered by a sheath of flexible plastic.
Claim 5
Dependent Claim
45 words
The device of claim 1, further comprising: a chalk dust carrying canister including provisions for the storage of the cord therein, its extension therefrom for use, the impregnation of the chalk retaining washers with chalk dust, and the retraction thereinto for storage subsequent to use.
Claim 6
Dependent Claim
45 words
The device of claim 3, further comprising: a chalk dust carrying canister including provisions for the storage of the cord therein, its extension therefrom for use, the impregnation of the chalk retaining washers with chalk dust, and the retraction thereinto for storage subsequent to use.
Claim 7
Dependent Claim
27 words
The device of claim 1, wherein each chalk dust retaining unit further comprises: a tapered cowl spanning between the circumference of each rigid washer to the cord.
Claim 8
Dependent Claim
27 words
The device of claim 2, wherein each chalk dust retaining unit further comprises: a tapered cowl spanning between the circumference of each rigid washer to the cord.
Claim 9
Dependent Claim
27 words
The device of claim 4, wherein each chalk dust retaining unit further comprises: a tapered cowl spanning between the circumference of each rigid washer to the cord.
Claim 10
Dependent Claim
27 words
The device of claim 5, wherein each chalk dust retaining unit further comprises: a tapered cowl spanning between the circumference of each rigid washer to the cord.
Claim 11
Dependent Claim
32 words
The device of claim 4, wherein the canister includes: flexible cord and chalk dust retaining unit wiping means to divest said cord and unit of excess chalk when drawn from the canister.
Claim 12
Dependent Claim
32 words
The device of claim 5, wherein the canister includes: flexible cord and chalk dust retaining unit wiping means to divest said cord and unit of excess chalk when drawn from the canister.
Claim 13
Dependent Claim
32 words
The device of claim 7, wherein the canister includes: flexible cord and chalk dust retaining unit wiping means to divest said cord and unit of excess chalk when drawn from the canister.
Claim 14
Dependent Claim
75 words
A chalk dust retaining unit for a chalk line marking device, said unit comprising: a pair of rigid, chalk resistant washers radially outstanding from the flexible cord; and a washer of chalk retaining material sandwiched between the rigid washers and extending at least to all points of the peripheries thereof, so as to contact the working surface when the cord is stretched thereon for use, and to hold the cord away from said working surface.
Claim 15
Dependent Claim
75 words
A chalk dust retaining unit for a chalk line marking device, said unit comprising: a pair of rigid, chalk resistant washers radially outstanding from the flexible cord; and a washer of chalk retaining material sandwiched between the rigid washers and extending at least to all points of the peripheries thereof, so as to contact the working surface when the cord is stretched thereon for use, and to hold the cord away from said working surface.
Claim 16
Dependent Claim
89 words
A chalk dust retaining unit for a chalk line marking device, said unit comprising: a pair of rigid, chalk resistant washers radially outstanding from the flexible cord; a washer of chalk retaining material sandwiched between the rigid washers and extending at least to all points of the peripheries thereof, so as to contact the working surface when the cord is stretched thereon for use, and to hold the cord away from said working surface; and a tapered cowl spanning between the circumference of each rigid washer to the cord.
Claim 17
Dependent Claim
89 words
A chalk dust retaining unit for a chalk line marking device, said unit comprising: a pair of rigid, chalk resistant washers radially outstanding from the flexible cord; a washer of chalk retaining material sandwiched between the rigid washers and extending at least to all points of the peripheries thereof, so as to contact the working surface when the cord is stretched thereon for use, and to hold the cord away from said working surface; and a tapered cowl spanning between the circumference of each rigid washer to the cord.
Claim 18
Dependent Claim
46 words
The device of claim 1, wherein each chalk dust retaining unit comprises: an elongate axisymmetrical body secured to the cord coaxially therewith, said body having a longitudinally central groove therearound and a pair of conically tapering end portions; wherein the groove contains chalk dust retaining material.
Claim 19
Dependent Claim
45 words
The device of claim 15, further comprising: a chalk dust carrying canister including provisions for the storage of the cord therein, its extension therefrom for use, the impregnation of the chalk retaining washer with chalk dust, and the retraction thereinto for storage subsequent to use.
Claim 20
Dependent Claim
47 words
A chalk dust retaining unit for chalk line marking device, said unit comprising: an elongate axisymmetrical body secured to the cord coaxially therewith, said body having a longitudinally central groove therearound and a pair of conically tapering end portions; wherein the groove contains chalk dust retaining material.
Claim 21
Dependent Claim
47 words
A chalk dust retaining unit for chalk line marking device, said unit comprising: an elongate axisymmetrical body secured to the cord coaxially therewith, said body having a longitudinally central groove therearound and a pair of conically tapering end portions; wherein the groove contains chalk dust retaining material.
Claim 22
Dependent Claim
104 words
The device of claim 1, further comprising an anchoring hook affixed to an end of the cord, said hook comprising: a thin strip of rigid material having a straight central portion, a pair of oppositely directed end portions perpendicular thereto; a pivot attaching the hook to the end of the cord at one end of the straight central portion; and a central slot in at least one of the end portions to provide clearance permitting the hook to be rotated about the pivot into a position with the straight central portion in line with and in contact with an end portion of the cord.
Claim 23
Dependent Claim
106 words
For a flexible elongate measuring element, the improvement of an anchoring hook to be fixed to an end thereof, said hook comprising: a thin strip of rigid material having a straight central portion, a pair of oppositely directed end portions perpendicular thereto; a pivot attaching the hook to the end of the element at one end of the straight central portion; and a central slot in at least one of the end portions to provide clearance permitting the hook to be rotated about the pivot into a position with the straight central portion in line with and in contact with an end portion of the element.
Claim 24
Dependent Claim
106 words
For a flexible elongate measuring element, the improvement of an anchoring hook to be fixed to an end thereof, said hook comprising: a thin strip of rigid material having a straight central portion, a pair of oppositely directed end portions perpendicular thereto; a pivot attaching the hook to the end of the element at one end of the straight central portion; and a central slot in at least one of the end portions to provide clearance permitting the hook to be rotated about the pivot into a position with the straight central portion in line with and in contact with an end portion of the element.
References Cited (Backward Citations)
US265815A
Cited
US338527A
Cited
US773016A
Cited
GB699186A
Cited
GB1026051A
Cited
US4152836A
Cited
US4660291A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-10 | 1992-10-10 | 1993-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-10 | 1996-10-10 | 1997-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-10 | 2000-10-10 | 2001-04-11 | $7700.00 | Window Closed / Lapsed |