US3745859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ratchet-type speed wrench
Assignee: Individual
•
Filing: 1971-09-16
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Granted: 1973-07-17
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Expires: 1991-09-16
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 strokes. 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 which is capable of extending four surfaces into bearing contact with a hexagonal head nut during power stroke, but is capable of unobstructed reverse or return stroke about substantially the same axis of revolution.
Inventors
- 👤 J Evans
- 👤 W Avey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:26
CPC Classifications
B; B25; B25B; B25B23/00; B25B23/0071; B25B13/00; B25B13/02; B25B13/08; B25B13/46
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
309 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 seizing jaw opening comprising: a flat surface originating at the front edge of said upper jaw portion and extending inwardly of said jaw opening in a direction substantially parallel to the axis of said jaw opening and said elongated shaft; an arcuate recess having one end intersecting said flat surface, and subtending a chord in alignment with said surface which has a width ratio of approximately one and a depth ratio of approximately four-tenths relative to a selected unit length; a generally triangular recess defining a line segment along the open side which has one end intersecting said chord and extending at an angle of approximately 160* therefrom, said line segment having a length approximately equal to said unit length; a second triangular recess defining a second line segment along the open side which has one end intersecting said line segment and extending at an angle of 120* therefrom, said second line segment having a length which has a ratio of approximately nine-tenths to said unit length; a third generally triangular recess defining a third line segment along the open side and which intersects said second line segment and extends at an angle about 120* therefrom, ssaid third line segment having a length ratio of about threetenths relative to said unit length; and a lower contact surface formed as part of said lower jaw portion and defining a contact surface which is at least of said unit length, and which contact surface extends at an angle of 120* from intersection with said third line segment, and which contact surface is disposed generally parallel to said first flat surface.
Claim 2
Dependent Claim
309 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 seizing jaw opening comprising: a flat surface originating at the front edge of said upper jaw portion and extending inwardly of said jaw opening in a direction substantially parallel to the axis of said jaw opening and said elongated shaft; an arcuate recess having one end intersecting said flat surface, and subtending a chord in alignment with said surface which has a width ratio of approximately one and a depth ratio of approximately four-tenths relative to a selected unit length; a generally triangular recess defining a line segment along the open side which has one end intersecting said chord and extending at an angle of approximately 160* therefrom, said line segment having a length approximately equal to said unit length; a second triangular recess defining a second line segment along the open side which has one end intersecting said line segment and extending at an angle of 120* therefrom, said second line segment having a length which has a ratio of approximately nine-tenths to said unit length; a third generally triangular recess defining a third line segment along the open side and which intersects said second line segment and extends at an angle about 120* therefrom, ssaid third line segment having a length ratio of about threetenths relative to said unit length; and a lower contact surface formed as part of said lower jaw portion and defining a contact surface which is at least of said unit length, and which contact surface extends at an angle of 120* from intersection with said third line segment, and which contact surface is disposed generally parallel to said first flat surface.
Claim 3
Dependent Claim
43 words
A wrench as set forth in claim 1 which is further characterized in that: each of said triangular recess and second triangular recess is formed with an angle opposite the respective line segment and second line segment of from 70* to 90* .
Claim 4
Dependent Claim
51 words
A speed wrench as set forth in claim 1 which is further characterized in that: said triangular recess is formed with an opposite angle from said line segment of approximately 85*; and said second triangular recess is formed with an opposite angle from said second line segment of approximately 70* .
Claim 5
Dependent Claim
111 words
A speed wrench as set forth in claim 1 which is further characterized in that: the intersection point of said chord and arcuate recess with the line segment and triangular recess forms a first contact point for gripping seizure of the hexagonal head nut during power stroke of said wrench; the intersection of said line segment and triangular recess with the second line segment and second triangular recess form a second contact point for gripping seizure of the hexagonal head nut during power stroke; and the intersection at the line segment and second line segment superpositions a third contact point for gripping seizure of the hexagonal head nut during power stroke.
Claim 6
Dependent Claim
41 words
A speed wrench as set forth in claim 4 which is further characterized in that: each of said firsT, second and third contact points is formed as a planar contact surface having a length of about one-fifth of said unit length.
Claim 7
Dependent Claim
47 words
A speed wrench as set forth in claim 1 which is further characterized to include: retaining tab means having one end rotatably mounted on said speed wrench adjacent said inner jaw portion for rotatable movement over said seizing jaw opening to serve as a position retaining member.
Claim 8
Dependent Claim
41 words
A speed wrench as set forth in claim 1 which is further characterized in that: said lower jaw portion is shortened relative to extension from said inner jaw portion to enable facile insertion of the wrench about a hexagonal head nut.
Claim 9
Dependent Claim
282 words
A 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 flat surface (100) originating at the front edge of said upper jaw portion and extending inwardly of said jaw opening at an angle of approximately 140* relative to said elongated shaft; an arcuate surface intersecting said flat surface (100) and extending to a nut contact point (30) which contacts the nut when the wrench is in power stroke position; a triangular recess (46) extending to a second contact point (34), a line segment extended across said contact points (30) and (34) being of a selected unit length; a second triangular recess (48) defining a second line segment which intersects said first line segment at an angle of approximately 120*, said second line segment having a length which is approximately equal to said unit length; a third recess (50) defining a third line segment which intersects said second line segment at an angle of approximately 160*, said third line segment having a length which is approximately one-third said unit line segment; a contacting surface (40) intersecting the end of said third line segment at an angle of approximately 120* and having a length which is approximately one and one-half times said unit length; and a retaining contact surface (98) formed integrally with said lower jaw portion and extending at an angle of approximately 120* from said contacting surface (40), said retaining contact surface (98) being approximately one and one-half times said unit length and extending parallel to said flat surface (100).
Claim 10
Dependent Claim
282 words
A 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 flat surface (100) originating at the front edge of said upper jaw portion and extending inwardly of said jaw opening at an angle of approximately 140* relative to said elongated shaft; an arcuate surface intersecting said flat surface (100) and extending to a nut contact point (30) which contacts the nut when the wrench is in power stroke position; a triangular recess (46) extending to a second contact point (34), a line segment extended across said contact points (30) and (34) being of a selected unit length; a second triangular recess (48) defining a second line segment which intersects said first line segment at an angle of approximately 120*, said second line segment having a length which is approximately equal to said unit length; a third recess (50) defining a third line segment which intersects said second line segment at an angle of approximately 160*, said third line segment having a length which is approximately one-third said unit line segment; a contacting surface (40) intersecting the end of said third line segment at an angle of approximately 120* and having a length which is approximately one and one-half times said unit length; and a retaining contact surface (98) formed integrally with said lower jaw portion and extending at an angle of approximately 120* from said contacting surface (40), said retaining contact surface (98) being approximately one and one-half times said unit length and extending parallel to said flat surface (100).
Claim 11
Dependent Claim
100 words
A speed wrench as set forth in claim 8 wherein: the intersection point of said arcuate surface and said triangular recess (46) form a contact point (30) for gripping seizure of the hexagonal head nut during power stroke of said wrench; the intersection of said triangular recess (46) and said second triangular recess (48) form a contact point (34) for gripping seizure of the hexagonal head nut during power stroke; and the intersection of said second triangular recess (46) and said third recess (50) form a contact point (38) for gripping seizure of the hexagonal head nut during power stroke.
References Cited (Backward Citations)
US584591A
Cited
US2652735A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |