Patent US3886658A successfully refreshed from Google Patents.
US3886658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hand-held power saw
Assignee: Wolf Machine Co
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Filing: 1974-05-13
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Granted: 1975-06-03
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Expires: 1994-05-13
Abstract
Abstract A dual handle structure for use with an electrically powered, hand-held saw. A safety handle incorporates a safety switch and is disposed in a plane transverse to the plane of the saw''s blade, and a main handle incorporates an off/on switch and is disposed in the plane of the saw''s blade. The safety handle comprises a handgrip of generally arcuate configuration that defines an arc of at least about 90*, and a trigger member that extends along the handgrip''s length and is pivotally connected at one end thereto, the handgrip and trigger member forming a curved bar-like handle. A switch carried in the handgrip electrically connects the trigger with the saw''s power source. The safety handle structure is fixed to the saw such that same may be gripped by an operator from the side of the saw, from the top of the saw, or from any point therebetween, the trigger being operable by the operator from any of those hand positions since it extends the full length of the handgrip.
Inventors
- 👤 Mark W Wikoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:23
CPC Classifications
B; B25; B25H; B25H1/00; B25H1/0021; B25H1/0028; B23; B23D; B23D45/00; B23D45/16; F; F16; F16P; F16P3/00; F16P3/18; F16P3/20; Y; Y10; Y10S; Y10S83/00; Y10S83/01
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
294 words
A hand-held power saw comprising a saw blade, a motor drivingly connected with said saw blade, said motor being located beyond the periphery of said saw blade, a main handle fixed to said motor at the end thereof opposite said saw blade, said main handle incorporating an off/on switch for said motor adapted to be activated by a trigger member, said main handle being located in the plane of said saw blade, and a dual grip safety handle connected to said saw and interposed between said motor and said saw blade, said safety handle lying in a plane substantially transverse to the plane of said saw blade, said dual grip safety handle including a first handgrip section of generally arcuate configuration that defines an arc of at least about 90*, said first section being fixed to said saw, a second handgrip section that extends along said first section''s length from one end thereof to the other, said second section being movably connected to said first section, thereby permitting said second section to be squeezed toward first section regardless of where said safety handle is held along its length, spring means interposed between said first and second handgrip sections, said spring means continuously biasing said second section away from said first section, restraint means interconnecting said first and second handgrip sections, said restraint means defining the outer limit permitted of said second section from said first section as biased by said spring means, and a safety switch fixed tO said first section and adapted to be activated by said second section, said switch being electrically connected with said off/on switch such that said trigger member must be activated and said second handgrip section must be squeezed toward said first handgrip section to energize said motor.
Claim 2
Dependent Claim
294 words
A hand-held power saw comprising a saw blade, a motor drivingly connected with said saw blade, said motor being located beyond the periphery of said saw blade, a main handle fixed to said motor at the end thereof opposite said saw blade, said main handle incorporating an off/on switch for said motor adapted to be activated by a trigger member, said main handle being located in the plane of said saw blade, and a dual grip safety handle connected to said saw and interposed between said motor and said saw blade, said safety handle lying in a plane substantially transverse to the plane of said saw blade, said dual grip safety handle including a first handgrip section of generally arcuate configuration that defines an arc of at least about 90*, said first section being fixed to said saw, a second handgrip section that extends along said first section''s length from one end thereof to the other, said second section being movably connected to said first section, thereby permitting said second section to be squeezed toward first section regardless of where said safety handle is held along its length, spring means interposed between said first and second handgrip sections, said spring means continuously biasing said second section away from said first section, restraint means interconnecting said first and second handgrip sections, said restraint means defining the outer limit permitted of said second section from said first section as biased by said spring means, and a safety switch fixed tO said first section and adapted to be activated by said second section, said switch being electrically connected with said off/on switch such that said trigger member must be activated and said second handgrip section must be squeezed toward said first handgrip section to energize said motor.
Claim 3
Dependent Claim
294 words
A hand-held power saw comprising a saw blade, a motor drivingly connected with said saw blade, said motor being located beyond the periphery of said saw blade, a main handle fixed to said motor at the end thereof opposite said saw blade, said main handle incorporating an off/on switch for said motor adapted to be activated by a trigger member, said main handle being located in the plane of said saw blade, and a dual grip safety handle connected to said saw and interposed between said motor and said saw blade, said safety handle lying in a plane substantially transverse to the plane of said saw blade, said dual grip safety handle including a first handgrip section of generally arcuate configuration that defines an arc of at least about 90*, said first section being fixed to said saw, a second handgrip section that extends along said first section''s length from one end thereof to the other, said second section being movably connected to said first section, thereby permitting said second section to be squeezed toward first section regardless of where said safety handle is held along its length, spring means interposed between said first and second handgrip sections, said spring means continuously biasing said second section away from said first section, restraint means interconnecting said first and second handgrip sections, said restraint means defining the outer limit permitted of said second section from said first section as biased by said spring means, and a safety switch fixed tO said first section and adapted to be activated by said second section, said switch being electrically connected with said off/on switch such that said trigger member must be activated and said second handgrip section must be squeezed toward said first handgrip section to energize said motor.
Claim 4
Dependent Claim
294 words
A hand-held power saw comprising a saw blade, a motor drivingly connected with said saw blade, said motor being located beyond the periphery of said saw blade, a main handle fixed to said motor at the end thereof opposite said saw blade, said main handle incorporating an off/on switch for said motor adapted to be activated by a trigger member, said main handle being located in the plane of said saw blade, and a dual grip safety handle connected to said saw and interposed between said motor and said saw blade, said safety handle lying in a plane substantially transverse to the plane of said saw blade, said dual grip safety handle including a first handgrip section of generally arcuate configuration that defines an arc of at least about 90*, said first section being fixed to said saw, a second handgrip section that extends along said first section''s length from one end thereof to the other, said second section being movably connected to said first section, thereby permitting said second section to be squeezed toward first section regardless of where said safety handle is held along its length, spring means interposed between said first and second handgrip sections, said spring means continuously biasing said second section away from said first section, restraint means interconnecting said first and second handgrip sections, said restraint means defining the outer limit permitted of said second section from said first section as biased by said spring means, and a safety switch fixed tO said first section and adapted to be activated by said second section, said switch being electrically connected with said off/on switch such that said trigger member must be activated and said second handgrip section must be squeezed toward said first handgrip section to energize said motor.
Claim 5
Dependent Claim
92 words
A saw as set forth in claim 1 wherein said restraint means includes structure defining a cavity within said first section, a foot fixed to said second section and disposed within said cavity, and a thumb screw adapted to be manually extended into and retracted from said cavity, said thumb screw restraining said second section in operational relation with said first section when extended into said cavity and permitting said second section to be moved away from said first section when retracted from said cavity to permit cleaning of said safety handle.
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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |