US3757614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rachet type speed wrench
Assignee: Individual
•
Filing: 1971-11-15
•
Granted: 1973-09-11
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Expires: 1991-11-15
Abstract
Abstract An improved open end wrench which is adapted for turning hexagonal head nuts, the wrench being of unitary formation with no moving parts yet having the capability of ratchet-type wrench return between successive power strikes. The wrench consists of a one piece formation of uniform substance having jaw portions which define a recessed wrench surface or configuration of nonsymmetrical character as comprised of a series of juxtaposed arcuate indentations. The co-extensive arcuate recesses about the inner wrench surface are so formed to extend four surfaces into bearing contact with a hexagonal head nut during power stroke, while retaining the capability of unobstructed reverse or return stroke movement about substantially the same axis of revolution.
Inventors
- 👤 J Evans
- 👤 W Avey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:59
CPC Classifications
B; B25; B25B; B25B13/00; B25B13/46; B25B13/02; B25B13/08; B25B23/00; B25B23/0071
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
212 words
A ratchet-type speed wrench of the open end type for use with hexagonal head nuts, which has an elongated shaft and a seizing jaw opening defined by upper and lower jaw portions and an inner jaw portion extending therebetween, said wrench comprising: a first arcuate recess originating proximate the front edge of said upper jaw portion and extending inwardly of said jaw opening to terminate as a first contacting point in abutment against a first side of said hexagonal head nut when in operative position; a second arcuate recess extending from said first contacting point and terminating at a second contact point which rests in abutment against a second adjacent side of said hexagonal head nut when in operative position; a third arcuate recess extending from said second contacting point and terminating at a third contact point which rests in abutment against a third side adjacent said second side of the hexagonal head nut when in operative position; and a fourth arcuate recess extending from said third contacting point and terminating in a planar contacting surface as formed on said lower jaw portion, said planar contacting surface being positioned in abutment with a fourth side adjacent said third side of the hexagonal head nut when said speed wrench is in operative position.
Claim 2
Dependent Claim
212 words
A ratchet-type speed wrench of the open end type for use with hexagonal head nuts, which has an elongated shaft and a seizing jaw opening defined by upper and lower jaw portions and an inner jaw portion extending therebetween, said wrench comprising: a first arcuate recess originating proximate the front edge of said upper jaw portion and extending inwardly of said jaw opening to terminate as a first contacting point in abutment against a first side of said hexagonal head nut when in operative position; a second arcuate recess extending from said first contacting point and terminating at a second contact point which rests in abutment against a second adjacent side of said hexagonal head nut when in operative position; a third arcuate recess extending from said second contacting point and terminating at a third contact point which rests in abutment against a third side adjacent said second side of the hexagonal head nut when in operative position; and a fourth arcuate recess extending from said third contacting point and terminating in a planar contacting surface as formed on said lower jaw portion, said planar contacting surface being positioned in abutment with a fourth side adjacent said third side of the hexagonal head nut when said speed wrench is in operative position.
Claim 3
Dependent Claim
35 words
A ratchet-type speed wrench as set forth in claim 1 wherein said contact points are formed as rounded projections each in contact with respective sides of said hexagonal head nut when in the operative position.
Claim 4
Dependent Claim
42 words
A ratchet-type speed wrench as set forth in claim 1 wherein said contact points are formed as flat surfaces essentially parallel to and in contact with respective first, second and third sides of said hexagonal head nut when in the operative position.
Claim 5
Dependent Claim
31 words
A ratchet-type speed wrench as set forth in claim 1 which is further characterized in that: said fourth arcuate recess is of generally the same radius as said second arcuate recess.
Claim 6
Dependent Claim
35 words
A ratchet-type speed wrench as set forth in claim 4 which is further characterized in that: said lower jaw portion is shorter than said upper jaw portion to define a larger diagonal seizing jaw opening.
Claim 7
Dependent Claim
78 words
A ratchet-type speed wrench as set forth in claim 1 which is further characterized in that: said upper jaw portion is shorter than said lower jaw portion, and said upper jaw portion terminates to define a relatively smaller first arcuate recess, and said lower jaw portion includes a retaining extension extending at an appreciable angle from said contacting surface thereby to define a seizing jaw opening having an axis at said appreciable angle relative to said elongated shaft.
References Cited (Backward Citations)
US584591A
Cited
US2671368A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |