US4077726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grip-lock pen
Assignee: RADIANT PEN CORP
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Filing: 1976-06-16
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Granted: 1978-03-07
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Expires: 1996-06-16
Abstract
Abstract A pen body for a writing instrument, having a plastic barrel, and at the writing end, a collar that covers the end of the barrel, with the outside of the barrel and the inside surface of the collar containing complementary interlocking means for forming a grip-lock connection between the barrel and the collar. The barrel and the inside of the collar may be provided with camming surfaces to secure a ball-point cartridge to the barrel.
Inventors
- 👤 Emil Hechtle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:54
CPC Classifications
B; B43; B43K; B43K7/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
115 words
A pen body for substantially enclosing a completely assembled, self contained ball-point cartridge to form a writing instrument, comprising a plastic barrel, the end of the barrel provided with means for preventing the cartrige from inward movement with respect to the barrel during the writing position, and a collar tightly compressing the outside of the end of the barrel, said barrel and collar means having an opening through which the writing tip of said ball-point cartridge extends, said collar means enclosing and having complementary interlocking means for securing the collar to the barrel preventing expansion of the barrel end, and provided with means for retaining the cartridge writing tip of said ball-point in outward position.
Claim 2
Dependent Claim
115 words
A pen body for substantially enclosing a completely assembled, self contained ball-point cartridge to form a writing instrument, comprising a plastic barrel, the end of the barrel provided with means for preventing the cartrige from inward movement with respect to the barrel during the writing position, and a collar tightly compressing the outside of the end of the barrel, said barrel and collar means having an opening through which the writing tip of said ball-point cartridge extends, said collar means enclosing and having complementary interlocking means for securing the collar to the barrel preventing expansion of the barrel end, and provided with means for retaining the cartridge writing tip of said ball-point in outward position.
Claim 3
Dependent Claim
30 words
The pen body of claim 1, wherein the outside surface of the barrel end and the contacting inside surface of the collar are tapered to tightly compress the barrel end.
Claim 4
Dependent Claim
43 words
The pen body of claim 1, wherein the inside of the barrel is provided with a standard ball-point pen cartridge, consisting of a tubular reservoir, a metal insert writing tip, containing a ball, and is secured between the barrel end and the collar.
Claim 5
Dependent Claim
33 words
The pen body of claim 1, wherein the barrel is provided with a longitudinally slotted air vent, between the collar and the barrel to allow air communication through the center of the collar
Claim 6
Dependent Claim
22 words
The pen body of claim 1, wherein the collar is made of more resilient plastic material than the plastic barrel of styrene.
Claim 7
Dependent Claim
57 words
The pen body of claim 1, wherein the end of the barrel, opposite its writing end, is attached to an adaptor having a compressible tapered end, said adaptor having a collar to compress the tapered end, said collar and adaptor being formed with interlocking means for securing a second cartridge to the pen body, in writing position.
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) | 1981-03-06 | 1981-09-05 | 1982-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-06 | 1985-09-05 | 1986-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-06 | 1989-09-05 | 1990-03-07 | $7700.00 | Window Closed / Lapsed |