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 Title: |
US4543680:
Blackboard eraser handle
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Vlahos, Stephanie A.; San Mateo, CA 94403
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| Assignee: |
None
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| Published / Filed: |
1985-10-01
/ 1984-01-18
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| Application Number: |
US1984000571810
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| IPC Code: |
Advanced:
A47L 13/46;
B43L 21/04;
Core:
A47L 13/10;
B43L 21/00;
IPC-7:
A47L 13/16;
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| U.S. Class: |
Current:
015/145;
015/209.1;
016/422;
016/426;
294/029;
294/033;
0D8/107;
Original:
015/145;
015/209.R;
016/114.R;
294/029;
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| Field of Search: |
015/145,146,209 R,210 R,210.5,219,220 R,224,244 R,425,426,105.5,192,221,202,223
051/205 R
016/114 R,DIG. 25
294/029,33
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| Priority Number: |
| 1984-01-18 |
US1984000571810 |
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| Abstract: |
A detachable handle for use on erasers having absorbent material attached to a flat, rigid backing plate such as the common blackboard eraser. A "C" shaped rigid strap contains "C" shaped notches in the ends thereof. These notches are disposed to face one another and to engage opposite edges of the eraser backing plate. The notches are sized to frictionally retain the backing plate thereby providing a handle to control the eraser during use.
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| Attorney, Agent or Firm: |
Harrison, David B. ;
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| Primary / Asst. Examiners: |
Coe, Philip R.; Stinson, Frankie L.
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| Maintenance Status: |
E3 Expired Check current status
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| INPADOC Legal Status: |
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| Family: |
None
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First Claim:
Show all 14 claims |
I claim:
1. A detachable handle for an eraser having an absorbing material attached to a flat rigid rectangular backing plate having edgewalls of predetermined thickness and used to erase chalk or grease pen marks from black boards, white boards and the like, comprising a unitary, resiliently rigid structure having a predetermined transverse width and a predetermined longitudinal length related to the width and length of said backing plate, said structure including a "C" shaped strap in the longitudinal direction and having two "C" shaped notches along opposite edges thereof perpendicular to said longitudinal direction and disposed to face one another for overlying clamping engagement with opposite edgewalls of said rigid backing plate and wherein the untensioned longitudinal dimension between the interior endwalls of said notches is slightly less than the dimension of said backing plate between said engaged edgewalls thereof, said handle structure being under tension when engaged on said eraser.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 15 U.S. patent(s) that reference this one
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