US5125758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piercing clamp
Assignee: Individual
•
Filing: 1990-12-06
•
Granted: 1992-06-30
•
Expires: 2010-12-06
Abstract
Abstract A piercing clamp for sheets of paper and the like, it includes a piercing jaw containing a piercing pin, and a holding jaw, and is urged closed by a spring. It is self piercing. Once a sheet of paper is pierced within the clamp, it retains its position relative to the clamp whether the clamp is open or closed. A guard may also be included to guard the piercing pin. The piercing clamp has great utility in a hanging clipboard. By piercing divider sheets within the clamp, other sheets may be inserted between the dividers without being pierced, allowing the piercing clamp to be used as a flier.
Inventors
- 👤 Thomas E. DeWan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:37
CPC Classifications
B; B42; B42F; B42F1/00; B42F1/006; B42F3/00; B42F3/04; Y; Y10; Y10T; Y10T24/00; Y10T24/20; Y10T24/202; Y10T24/203; Y10T24/204; Y10T24/209
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
134 words
A piercing clamp to retain a piercable workpiece, comprising: a piercing jaw; a piercing pin within said piercing jaw; a holding jaw opposing said piercing jaw, configured with said piercing pin to be self piercing; spring means, to urge said jaws closed and to urge self piercing; whereby when the piercing clamp is closed, a piercable workpiece held therein is retained by said piercing pin and said jaws, and when the piercing clamp is open, the piercable workpiece is retained by said piercing pin, so that a piercable workpiece may be added to the piercing clamp without the previously retained workpiece losing its orientation within the piercing clamp; wherein said spring means also guards said piercing pin by means of a portion thereof being positioned over said piercing pin when said jaws are closed.
Claim 2
Dependent Claim
134 words
A piercing clamp to retain a piercable workpiece, comprising: a piercing jaw; a piercing pin within said piercing jaw; a holding jaw opposing said piercing jaw, configured with said piercing pin to be self piercing; spring means, to urge said jaws closed and to urge self piercing; whereby when the piercing clamp is closed, a piercable workpiece held therein is retained by said piercing pin and said jaws, and when the piercing clamp is open, the piercable workpiece is retained by said piercing pin, so that a piercable workpiece may be added to the piercing clamp without the previously retained workpiece losing its orientation within the piercing clamp; wherein said spring means also guards said piercing pin by means of a portion thereof being positioned over said piercing pin when said jaws are closed.
Claim 3
Dependent Claim
16 words
A piercing clamp as recited in claim 1, wherein one of said jaws includes a board.
Claim 4
Dependent Claim
20 words
A piercing clamp as recited in claim 1, wherein said piercing pin has an angle alpha of 90° or less.
Claim 5
Dependent Claim
21 words
A piercing clamp as recited in claim 3, wherein said piercing pin is stamped from and bent within said piercing jaw.
Claim 6
Dependent Claim
20 words
A piercing clamp as recited in claim 1, further comprising a plurality of piercing pins, each within said piercing jaw.
Claim 7
Dependent Claim
29 words
A piercing clamp as recited in claim 1, further comprising a hole in said holding jaw, wherein self piercing is aided by said piercing pin mating with said hole.
Claim 8
Dependent Claim
20 words
A piercing clamp as recited in claim 1, further comprising means to assist a user in urging said jaws open.
Claim 9
Dependent Claim
73 words
A piercing clamp as recited in claim 1, wherein said piercing pin is within said piercing jaw far enough to allow an other piercable workpiece to be inserted into said jaws up to said piercing pin, on a side of said pin opposite from said spring means, so that the other piercable workpiece is not pierced yet retained by said jaws, and so that the piercing clamp may be used as a filer.
Claim 10
Dependent Claim
17 words
A piercing clamp as recited in claim 1, wherein said spring means comprises a split tubular spring.
Claim 11
Dependent Claim
136 words
A piercing clamp, to retain a piercable workpiece, comprising: a piercing jaw; a piercing pin within said piercing jaw; a holding jaw opposing said piercing jaw, containing a hole that mates with said piercing pin when the piercing clamp is closed; spring means, to urge said jaws closed, to urge self piercing, and to guard said piercing pin by means of a portion thereof being positioned over said piercing pin when said jaws are closed; whereby when the piercing clamp is closed, a piercable workpiece held therein is retained by said piercing pin and said jaws, and when the piercing clamp is open, the piercable workpiece is retained by said piercing pin, so that a piercable workpiece may be added to the piercing clamp without the previously retained workpiece losing its orientation within the piercing clamp.
Claim 12
Dependent Claim
136 words
A piercing clamp, to retain a piercable workpiece, comprising: a piercing jaw; a piercing pin within said piercing jaw; a holding jaw opposing said piercing jaw, containing a hole that mates with said piercing pin when the piercing clamp is closed; spring means, to urge said jaws closed, to urge self piercing, and to guard said piercing pin by means of a portion thereof being positioned over said piercing pin when said jaws are closed; whereby when the piercing clamp is closed, a piercable workpiece held therein is retained by said piercing pin and said jaws, and when the piercing clamp is open, the piercable workpiece is retained by said piercing pin, so that a piercable workpiece may be added to the piercing clamp without the previously retained workpiece losing its orientation within the piercing clamp.
Claim 13
Dependent Claim
20 words
A piercing clamp as recited in claim 10, further comprising means to assist a user in urging said jaws open.
Claim 14
Dependent Claim
16 words
A piercing clamp as recited in claim 10, wherein one of said jaws includes a board.
Claim 15
Dependent Claim
73 words
A piercing clamp as recited in claim 10, wherein said piercing pin is within said piercing jaw far enough to allow an other piercable workpiece to be inserted into said jaws up to said piercing pin, on a side of said pin opposite from said spring means, so that the other piercable workpiece is not pierced yet retained by said jaws, and so that the piercing clamp may be used as a filer.
Claim 16
Dependent Claim
17 words
A piercing clamp as recited in claim 10, wherein said spring means comprises a split tubular spring.
Claim 17
Dependent Claim
151 words
A piercing clamp, to retain a piercable workpiece, comprising: a piercing jaw; a plurality of piercing pins within said piercing jaw; a holding jaw opposing said piercing jaw, containing holes that mate with said piercing pins when the piercing clamp is closed; spring means, to urge said jaws closed, to urge self piercing, and to guard said piercing pin by means of a portion thereof being positioned over said piercing pin when said jaws are closed; handles attached to said jaws, to assist a user in urging said jaws open; whereby when the piercing clamp is closed, a piercable workpiece held therein is retained by said piercing pins and said jaws, and when the piercing clamp is open, the piercable workpiece is retained by said piercing pins, so that a piercable workpiece may be added to the piercing clamp without the previously retained workpiece losing its orientation within the piercing clamp.
Claim 18
Dependent Claim
151 words
A piercing clamp, to retain a piercable workpiece, comprising: a piercing jaw; a plurality of piercing pins within said piercing jaw; a holding jaw opposing said piercing jaw, containing holes that mate with said piercing pins when the piercing clamp is closed; spring means, to urge said jaws closed, to urge self piercing, and to guard said piercing pin by means of a portion thereof being positioned over said piercing pin when said jaws are closed; handles attached to said jaws, to assist a user in urging said jaws open; whereby when the piercing clamp is closed, a piercable workpiece held therein is retained by said piercing pins and said jaws, and when the piercing clamp is open, the piercable workpiece is retained by said piercing pins, so that a piercable workpiece may be added to the piercing clamp without the previously retained workpiece losing its orientation within the piercing clamp.
Claim 19
Dependent Claim
16 words
A piercing clamp as recited in claim 15, wherein one of said jaws includes a board.
Claim 20
Dependent Claim
73 words
A piercing clamp as recited in claim 15, wherein said piercing pins are within said piercing jaw far enough to allow an other piercable workpiece to be inserted into said jaws up to said piercing pins, on a side of said pins opposite from said spring means, so that the other piercable workpiece is not pierced yet retained by said jaws, and so that the piercing clamp may be used as a filer.
Claim 21
Dependent Claim
17 words
A piercing clamp as recited in claim 15, wherein said spring means comprises a split tubular spring.
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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) | 1995-06-30 | 1995-12-30 | 1996-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-30 | 1999-12-30 | 2000-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-30 | 2003-12-30 | 2004-06-30 | $7700.00 | Window Closed / Lapsed |