Patent US4149811A successfully refreshed from Google Patents.
US4149811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Style handle
Assignee: Individual
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Filing: 1975-10-03
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Granted: 1979-04-17
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Expires: 1995-10-03
Abstract
Abstract A style handle for writing and engraving instruments. The base portion of this style, which is gripped when in use, consists of three, essentially-flat surfaces arranged in a triadic spiral at a selected pitch conforming with an individual's finger grip when the style is held in a normal manner. So held, the edges of the spiral lie in the grooved portions between the individual's thumb and fingers with the thumb and fingers resting upon the flats of the spiral in a relaxed, natural manner. Also, the inclination of the spiral forms an abutment which permits the style to be held with less pressure when pressing it against a writing or working surface.
Inventors
- 👤 Melvin C. Coffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:30
CPC Classifications
B; B43; B43K; B43K23/00; B43K23/004; A; A46; A46B; A46B5/00; A46B5/02; B43K7/00; B43K7/005; B44; B44B; B44B11/00; B44B11/02; A46B2200/00; A46B2200/20; A46B2200/202; A46B2200/205
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
176 words
A style handle adapted to be gripped by a normal finger grip at a gripping portion adjacent to the scribing point at the base end of the handle, and including a haft portion extending beyond the gripping portion, said haft portion being essentially circular in cross section, wherein the gripping portion has substantially trifold axial symmetry about its longitudinal axis and comprises: (a) three substantially identical uniformly varying twisting grip surfaces defining a continuous triadic spiral commencing at the base end of the handle and rotating axially to the haft portion, and wherein: (b) the edges of said spiral, where the grip surfaces join, are spaced at said base end of the handle at a lateral spacing which is greater than the haft diameter and the spacing of these edges decreases toward the haft to merge into the surface of the haft, and wherein: (c) the grip surfaces are widest adjacent to said base, narrow towards the haft and merge into the surface of the haft as the edges merge into the surface of the haft.
Claim 2
Dependent Claim
176 words
A style handle adapted to be gripped by a normal finger grip at a gripping portion adjacent to the scribing point at the base end of the handle, and including a haft portion extending beyond the gripping portion, said haft portion being essentially circular in cross section, wherein the gripping portion has substantially trifold axial symmetry about its longitudinal axis and comprises: (a) three substantially identical uniformly varying twisting grip surfaces defining a continuous triadic spiral commencing at the base end of the handle and rotating axially to the haft portion, and wherein: (b) the edges of said spiral, where the grip surfaces join, are spaced at said base end of the handle at a lateral spacing which is greater than the haft diameter and the spacing of these edges decreases toward the haft to merge into the surface of the haft, and wherein: (c) the grip surfaces are widest adjacent to said base, narrow towards the haft and merge into the surface of the haft as the edges merge into the surface of the haft.
Claim 3
Dependent Claim
18 words
The style handle defined in claim 1, wherein said gripping portion has trifold symmetry about its longitudinal axis.
Claim 4
Dependent Claim
16 words
The style handle defined in claim 1, wherein said surfaces between the edges are essentially flat.
Claim 5
Dependent Claim
16 words
The style handle defined in claim 1, wherein said surfaces between the edges are slightly concave.
Claim 6
Dependent Claim
16 words
The style handle defined in claim 1, wherein said surfaces between the edges are slightly convex.
Claim 7
Dependent Claim
16 words
The style handle defined in claim 1, wherein said haft portion is essentially circular in cross-section.
Claim 8
Dependent Claim
24 words
The style handle defined in claim 1, wherein said spiral twists in a clockwise direction when viewed from the haft end of said handle.
Claim 9
Dependent Claim
24 words
the style handle defined in claim 1, wherein said spiral twists in a counterclockwise direction when viewed from the haft end of said handle.
Claim 10
Dependent Claim
23 words
The style handle defined in claim 1, wherein said continuous triadic spiral rotates axially through an arc of at least about 90° C.
Claim 11
Dependent Claim
16 words
The style handle defined in claim 9, wherein said arc is approximately 90 to 120 degrees.
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) | 1982-04-16 | 1982-10-16 | 1983-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-16 | 1986-10-16 | 1987-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-16 | 1990-10-16 | 1991-04-17 | $7700.00 | Window Closed / Lapsed |