US4160256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubular pen for recording apparatus
Assignee: JS Staedtler GmbH and Co KG
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Filing: 1977-10-12
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Granted: 1979-07-03
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Expires: 1997-10-12
Abstract
Abstract A tubular pen for recording apparatus and the like has a freely displaceable weight within a hollow body and there is a cap or protective element on the end of the body. The cap and the weight are connected together by a spring of metal or synthetic resin material such that there is relative movement between the cap and weight and the interconnected cap and weight together with the spring constitute a single assembly. The spring has its ends firmly attached to the cap and weight or may be integral with these two components.
Inventors
- 👤 Peter Dziuk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:20
CPC Classifications
B; B43; B43K; B43K8/00; B43K8/16; B43K8/18
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
76 words
A tubular pen for recording apparatus and the like comprising a hollow body having an end cap, a freely displaceable weight within said body, said weight comprising a casing of synthetic resin material and a metallic core in said casing, and means firmly attached to each of said cap and weight for undetachably connecting said cap and weight such that there is a relative movement therebetween and the connected cap and weight define a single assembly.
Claim 2
Dependent Claim
76 words
A tubular pen for recording apparatus and the like comprising a hollow body having an end cap, a freely displaceable weight within said body, said weight comprising a casing of synthetic resin material and a metallic core in said casing, and means firmly attached to each of said cap and weight for undetachably connecting said cap and weight such that there is a relative movement therebetween and the connected cap and weight define a single assembly.
Claim 3
Dependent Claim
23 words
A tubular pen as claimed in claim 1 wherein said connecting means comprises a spring of one of metal and synthetic resin material.
Claim 4
Dependent Claim
19 words
A tubular pen as claimed in claim 1 wherein said connecting means is integral with said cap and weight.
Claim 5
Dependent Claim
32 words
A tubular pen as claimed in claim 1 wherein said casing has a rear end, said connecting means comprises a synthetic resin element connected between said casing rear end and said cap.
Claim 6
Dependent Claim
25 words
A tubular pen as claimed in claim 4 wherein said synthetic resin connecting element is a helical coil spring surrounding said core but spaced therefrom.
Claim 7
Dependent Claim
39 words
A tubular pen as claimed in claim 1 wherein said casing has a rear end, said connecting means comprising at least two helical coils of synthetic resin material each partially extending over at least a portion of said core.
Claim 8
Dependent Claim
25 words
A tubular pen as claimed in claim 1 wherein said connecting means comprises a metal spring firmly anchored in each of said weight and cap.
Claim 9
Dependent Claim
21 words
A tubular pen as claimed in claim 1 wherein said connecting means comprises a pair of axially extending flexible elongated elements.
Claim 10
Dependent Claim
34 words
A tubular pen as claimed in claim 8 wherein said elongated elements each has notches on a surface thereof to facilitate radial movements of said elements during relative movement between said weight and cap.
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) | 1982-07-02 | 1983-01-01 | 1983-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-02 | 1987-01-01 | 1987-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-02 | 1991-01-01 | 1991-07-03 | $7700.00 | Window Closed / Lapsed |