US4920895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drafting device for the convenient containment of eraser shavings
Assignee: Individual
•
Filing: 1989-04-07
•
Granted: 1990-05-01
•
Expires: 2009-04-07
Abstract
Abstract A drafting device connectable to a side of a drafting board having a top surface is disclosed. The device has a housing with a top, a pair of sides, a length, and an interior. A storage tray for drafting tools is affixed to the top of the housing. A removable trough is slidably mounted in the interior of the housing and has a retracted position, an extended position, and a pair of lips. A slot is contained on either of the pair of sides of the housing so that eraser shavings can be brushed from the drafting board through the slot and into the trough for keeping the drafting board clean.
Inventors
- 👤 John Burke
- 👤 John Kraljic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:46
CPC Classifications
A; A47; A47B; A47B27/00; B; B43; B43L; B43L5/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
212 words
A drafting device connectable to a side of a drafting board having a top surface, comprising: (a) a housing containing a trough having a top, a pair of sides, a length, an interior, and including a slot contained on either of said pair of sides of said housing so that eraser shavings can be brushed from the drafting board through said slot contained on said housing and into said trough for keeping said drafting board free of eraser shavings; (b) a storage tray for drafting tools and being affixed to said top of said housing; and (c) said removable trough being slidably mounted in said interior of said housing and having a retracted position, an extended position, and a pair of lips, said pair of lips affixed to said trough and slideable in said housing so that said trough can slide from said retracted position to said extended position and back and fourth, each of said pair of sides of said housing contain an internal recess extending substantially said length of said housing for slidably receiving said pair of lips of said trough so that when said trough requires emptying said trough is pulled out to said extended position and removed from said housing for emptying the shavings and henceforth returned thereto.
Claim 2
Dependent Claim
212 words
A drafting device connectable to a side of a drafting board having a top surface, comprising: (a) a housing containing a trough having a top, a pair of sides, a length, an interior, and including a slot contained on either of said pair of sides of said housing so that eraser shavings can be brushed from the drafting board through said slot contained on said housing and into said trough for keeping said drafting board free of eraser shavings; (b) a storage tray for drafting tools and being affixed to said top of said housing; and (c) said removable trough being slidably mounted in said interior of said housing and having a retracted position, an extended position, and a pair of lips, said pair of lips affixed to said trough and slideable in said housing so that said trough can slide from said retracted position to said extended position and back and fourth, each of said pair of sides of said housing contain an internal recess extending substantially said length of said housing for slidably receiving said pair of lips of said trough so that when said trough requires emptying said trough is pulled out to said extended position and removed from said housing for emptying the shavings and henceforth returned thereto.
Claim 3
Dependent Claim
25 words
A device as defined in claim 1, wherein said slot contained on said housing has a bottom edge substantially extending said length of said housing.
Claim 4
Dependent Claim
89 words
A device as defined in claim 1; further comprising fastening means, said fastening means including a plurality of angle brackets so that the drafting device can be connected to either side of the drafting board in such a position where said bottom edge of said slot of said housing substantially meets the top surface of the drafting board and said pair of lips of said trough so that a smooth communication between the top surface of the drafting board and said pair of lips of said trough is provided.
Claim 5
Dependent Claim
17 words
A device as defined in claim 3, wherein said plurality of angle brackets are three angle brackets.
Claim 6
Dependent Claim
22 words
A device as defined in claim 1, wherein said storage tray contains a plurality of compartments defined by a plurality of partitions.
Claim 7
Dependent Claim
15 words
A device as defined in claim 5, wherein said plurality of compartments is five compartments.
Claim 8
Dependent Claim
15 words
A device as defined in claim 5, wherein said plurality of partitions is four partitions.
Claim 9
Dependent Claim
37 words
A device as defined in claim 1, wherein said trough has a free end, a closed end, and a substantially "U" - shape configuration with two vertical members each having a free end and one horizontal member.
Claim 10
Dependent Claim
26 words
A device as defined in claim 8, wherein each of said pair of lips is disposed on each of said free ends of said vertical members.
Claim 11
Dependent Claim
26 words
A device as defined in claim 8, wherein said trough has a front plate with a back side affixed to said free end of said trough.
Claim 12
Dependent Claim
29 words
A device as defined in claim 10, wherein said front plate has a handle so that said trough can achieve said retracted position and said extended position more easily.
Claim 13
Dependent Claim
21 words
A device as defined in claim 1, further comprising means to keep said trough in said retracted position inside said housing.
Claim 14
Dependent Claim
23 words
A device as defined in claim 12, wherein said closing means include a hidden catch with a first part and a second part.
Claim 15
Dependent Claim
39 words
A device as defined in claim 13, wherein said first part of said catch is disposed inside said housing and said second part of said catch is disposed on said back side of said front plate of said trough.
Claim 16
Dependent Claim
21 words
A device as defined in claim 1, wherein said housing, said storage tray, and said trough are made from durable plastic.
Claim 17
Dependent Claim
17 words
A device as defined in claim 3, wherein said plurality of angle brackets are made from steel.
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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) | 1993-04-30 | 1993-10-30 | 1994-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-30 | 1997-10-30 | 1998-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-30 | 2001-10-30 | 2002-05-01 | $7700.00 | Window Closed / Lapsed |