US3709073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated wrench
Assignee: Individual
•
Filing: 1971-01-25
•
Granted: 1973-01-09
•
Expires: 1991-01-25
Abstract
Abstract A lightweight wrench formed from a plurality of laminations welded together in assembly and having a body including a hollow elongated handle and heads at opposite ends of the handle. The hollow handle and a portion of each head are formed by two outer laminations. Each head is further defined by two additional inner laminations. The outer laminations are bent to impart strength to the handle and head portions of the wrench.
Inventors
- 👤 R Kurtz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:39
CPC Classifications
B; B25; B25B; B25B13/00; B25B13/46; B25B13/02; B25B13/08
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
212 words
A wrench having a body including a hollow elongated handle and a head and comprising a plurality of sheet metal laminations welded together in assembly at the preipheral edges thereof, said laminations including a pair of outer laminations and at least one inner lamination, each of said outer laminations including a handle defining portion and a head defining portion, at least one of said outer laminations including a connecting portion joining said head defining portion to said handle defining portion thereof, said connecting portion defining a bearing surface disposed generally transversely of the longitudinal axis of said handle defining portion, said head defining portion of said one outer lamination being offset from said handle defining portion thereof a distance substantially equal to the thickness of said one inner lamination, said handle defining portion of at least one of said outer laminations having a generally concave inwardly opening cross-sectional configuration, said pair of outer laminations cooperating in assembly to define said hollow handle and a portion of said head, said one inner lamination received between and engaging the head defining portions of said outer laminations and further defining said head, said one inner lamination having a transversely extending substantially planar abutment surface thereon engaging said bearing surface along a straight line of contact.
Claim 2
Dependent Claim
212 words
A wrench having a body including a hollow elongated handle and a head and comprising a plurality of sheet metal laminations welded together in assembly at the preipheral edges thereof, said laminations including a pair of outer laminations and at least one inner lamination, each of said outer laminations including a handle defining portion and a head defining portion, at least one of said outer laminations including a connecting portion joining said head defining portion to said handle defining portion thereof, said connecting portion defining a bearing surface disposed generally transversely of the longitudinal axis of said handle defining portion, said head defining portion of said one outer lamination being offset from said handle defining portion thereof a distance substantially equal to the thickness of said one inner lamination, said handle defining portion of at least one of said outer laminations having a generally concave inwardly opening cross-sectional configuration, said pair of outer laminations cooperating in assembly to define said hollow handle and a portion of said head, said one inner lamination received between and engaging the head defining portions of said outer laminations and further defining said head, said one inner lamination having a transversely extending substantially planar abutment surface thereon engaging said bearing surface along a straight line of contact.
Claim 3
Dependent Claim
199 words
A wrench having a body including a hollow elongated handle and a head and comprising a plurality of laminations of sheet material bonded together in assembly, said laminations including a pair of outer laminations and at least one inner lamination, each of said outer laminations including a handle defining portion and a head defining portion, at least one of said outer laminations having said head defining portion thereof off-set outwardly from said handle defining portion thereof and including a connecting portion intermediate said head and handle defining portions providing connection therebetween, said connecting portion having at least two transversely spaced apart bearing points thereon, said pair of outer laminations cooperating in assembly to define said hollow handle and a portion of said head, said one inner lamination being received in assembly between said head defining portions of said outer laminations and engaging at least said one outer lamination to further define said head, said one inner lamination having at least two transversely spaced apart bearing points thereon, each of said bearing points on said one inner lamination engaging an associated bearing point on said connecting portion to prevent rotation of said one inner lamination relative to said outer laminations.
Claim 4
Dependent Claim
199 words
A wrench having a body including a hollow elongated handle and a head and comprising a plurality of laminations of sheet material bonded together in assembly, said laminations including a pair of outer laminations and at least one inner lamination, each of said outer laminations including a handle defining portion and a head defining portion, at least one of said outer laminations having said head defining portion thereof off-set outwardly from said handle defining portion thereof and including a connecting portion intermediate said head and handle defining portions providing connection therebetween, said connecting portion having at least two transversely spaced apart bearing points thereon, said pair of outer laminations cooperating in assembly to define said hollow handle and a portion of said head, said one inner lamination being received in assembly between said head defining portions of said outer laminations and engaging at least said one outer lamination to further define said head, said one inner lamination having at least two transversely spaced apart bearing points thereon, each of said bearing points on said one inner lamination engaging an associated bearing point on said connecting portion to prevent rotation of said one inner lamination relative to said outer laminations.
Claim 5
Dependent Claim
36 words
A wrench as set forth in claim 2 wherein said one inner lamination engages said connecting portion along a transversely extending non-arcuate line of contact and said bearing points are located on said line of contact.
Claim 6
Dependent Claim
27 words
A wrench as set forth in claim 3 wherein said sheet material is metal and said laminations are welded together in assembly at the peripheral edges thereof.
Claim 7
Dependent Claim
34 words
A wrench as set forth in claim 4 wherein the metal from which said one inner lamination is formed is substantially harder than the metal from which said pair of outer laminations are formed.
Claim 8
Dependent Claim
61 words
A wrench as set forth in claim 3 including an insert received between the head defining portions of said outer laminations, said one inner lamination having a fixed jaw thereon, said insert being movable relative to said one inner lamination and defining a movable jaw, said fixed jaw and said movable jaw defining a work receiving opening of variable size therebetween.
Claim 9
Dependent Claim
15 words
A wrench as set forth in claim 3 wherein said sheet material is stainless steel.
Claim 10
Dependent Claim
15 words
A wrench as set forth in claiM 3 wherein said sheet material is beryllium copper.
Claim 11
Dependent Claim
17 words
A wrench as set forth in claim 3 wherein said line of contact is a straight line.
Claim 12
Dependent Claim
24 words
A wrench as set forth in claim 3 wherein at least one of said outer laminations has a generally concave inwardly opening cross-sectional configuration.
References Cited (Backward Citations)
US2720799A
Cited
US2797600A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |