Patent US3837211A successfully refreshed from Google Patents.
US3837211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-stroke hand tool
Assignee: TE Connectivity Corp
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Filing: 1973-07-06
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Granted: 1974-09-24
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Expires: 1993-07-06
Abstract
Abstract Two stroke hand tool has a reciprocable ram, a toggle mechanism for moving the ram, and a movable handle for straightening the toggle mechanism. A connecting link extends from the handle to one of the links of the toggle mechanism. This connecting link is connected to the handle at one location during the first stroke of the handle to bring about substantial ram travel. During second stroke of the handle, the connecting link is pivoted to the handle at a second location to develop high thrust in the ram during the final portion of the ram stroke.
Inventors
- 👤 P Gress
- 👤 W Over
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:28
CPC Classifications
H; H01; H01R; H01R43/00; H01R43/04; H01R43/042; H01R43/0421; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/5313; Y10T29/532; Y10T29/53209; Y10T29/53213; Y10T29/53222; Y10T29/53226
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
220 words
An apparatus of the type comprising a frame, a movable handle pivoted to said frame on a first pivotal axis, said handle being movable towards and away from said frame, a ram reciprocably supported on said frame, toggle means comprising first and second toggle links, said first toggle link being pivoted to said frame and to said second toggle link, said second toggle link being pivoted to said ram whereby, upon straightening said toggle means, said ram is driven through its working stroke, the improvement to said apparatus comprising: a connecting link, said connecting link being pivoted at one of its ends to said first toggle link and having another end which is pivoted to said handle, a plurality of connecting link pivot positions on said movable handle, said positions being at different distances from said first pivotal axis, and means for shifting said other end of said connecting link from a relatively remote one of said positions to a relatively proximate one of said positions during movement of said handle away from said frame whereby during each stroke of said movable handle towards said frame, said toggle means is partially straightened and said ram is driven through a portion of its stroke, and during successive strokes as said toggle means is straightened, the mechanical advantage of said apparatus increases.
Claim 2
Independent Claim
220 words
An apparatus of the type comprising a frame, a movable handle pivoted to said frame on a first pivotal axis, said handle being movable towards and away from said frame, a ram reciprocably supported on said frame, toggle means comprising first and second toggle links, said first toggle link being pivoted to said frame and to said second toggle link, said second toggle link being pivoted to said ram whereby, upon straightening said toggle means, said ram is driven through its working stroke, the improvement to said apparatus comprising: a connecting link, said connecting link being pivoted at one of its ends to said first toggle link and having another end which is pivoted to said handle, a plurality of connecting link pivot positions on said movable handle, said positions being at different distances from said first pivotal axis, and means for shifting said other end of said connecting link from a relatively remote one of said positions to a relatively proximate one of said positions during movement of said handle away from said frame whereby during each stroke of said movable handle towards said frame, said toggle means is partially straightened and said ram is driven through a portion of its stroke, and during successive strokes as said toggle means is straightened, the mechanical advantage of said apparatus increases.
Claim 3
Dependent Claim
235 words
In a toggle type hand tool of the type comprising a frame, having a fixed handle extending therefrom, a movable handle pivoted to said frame on a first pivotal axis, said movable handle being movable towards and away from said fixed handle, a ram reciprocably supported on said frame, toggle means comprising first and second toggle links, said first toggle link being pivoted to said frame and to said second toggle link, said second toggle link being pivoted to said ram whereby, upon straightening said toggle means, said ram is driven through its working stroke, the improvement to said apparatus comprising: a connecting link, said connecting link being pivoted at one of its ends to said first toggle link and having another end which is pivoted to said movable handle a plurality of connecting link pivot positions on said movable handle, said positions being at different distances from said first pivotal axis, and means for shifting said other end of said connecting link from a relatively remote one of said positions to a relatively proximate one of said positions during movement of said handle away from said frame means whereby during each stroke of said movable handle towards said fixed handle, said toggle means is partially straightened and said ram is driven through a portion of its stroke, and during successive strokes as said toggle means is straightened, the mechanical advantage of said tool increases.
Claim 4
Dependent Claim
235 words
In a toggle type hand tool of the type comprising a frame, having a fixed handle extending therefrom, a movable handle pivoted to said frame on a first pivotal axis, said movable handle being movable towards and away from said fixed handle, a ram reciprocably supported on said frame, toggle means comprising first and second toggle links, said first toggle link being pivoted to said frame and to said second toggle link, said second toggle link being pivoted to said ram whereby, upon straightening said toggle means, said ram is driven through its working stroke, the improvement to said apparatus comprising: a connecting link, said connecting link being pivoted at one of its ends to said first toggle link and having another end which is pivoted to said movable handle a plurality of connecting link pivot positions on said movable handle, said positions being at different distances from said first pivotal axis, and means for shifting said other end of said connecting link from a relatively remote one of said positions to a relatively proximate one of said positions during movement of said handle away from said frame means whereby during each stroke of said movable handle towards said fixed handle, said toggle means is partially straightened and said ram is driven through a portion of its stroke, and during successive strokes as said toggle means is straightened, the mechanical advantage of said tool increases.
Claim 5
Dependent Claim
53 words
A tool as set forth in claim 2, said movable handle having slot means therein, said slot means having a first end which is proximate to said first pivotal axis and having a second end which is remote from said first pivotal axis, said ends of said slot means constituting said pivot positions.
Claim 6
Dependent Claim
77 words
A tool as set forth in claim 3 wherein said means for shifting said other end of said connecting link comprises ratchet means effective between said ram and said frame, said ratchet means being effective to prevent retrograde movement of said ram when said ram is at an intermediate position in its stroke whereby said other end of said connecting link is moved in said slot during movement of said movable handle away from said fixed handle.
Claim 7
Dependent Claim
332 words
In a toggle type hand tool of the type comprising a frame and having a fixed handle extending therefrom, a movable handle pivoted to said frame on a first pivotal axis, said handle being movable toward and away from said fixed handle, a ram reciprocably supported on said frame, toggle means comprising first and second toggle links, said first toggle link being pivoted to said frame and to said second toggle link, said second toggle link being pivoted to said ram whereby, upon straightening said toggle means, said ram is driven through its working stroke, the improvement to said apparatus comprising: a connecting link, said connecting link being pivoted at one of its ends to said first toggle link and having another end which is proximate to said movable handle, slot means in said movable handle, said slot means having a first end which is proximate to said first pivotal axis and a second end which is remote from said first pivotal axis, said other end of said connecting link being pivoted in said slot means, and ratchet means effective between said ram and said frame, said ratchet means being effective to prevent retrograde movement of said ram when said ram is at an intermediate position in its working stroke whereby, at the beginning of the stroke of said ram, said toggle is broken, said movable handle is in its open position, and said connecting link is pivoted to said movable handle at said other end of said slot means, and upon a first stroke of said movable handle towards said fixed handle, said handle is partially straightened and said ram is driven through a major portion of its working stroke, and upon opening said handle, said ram remains stationary and said other end of said connecting link moves to said first end of said slot means, and upon closing said movable handle a second time, said toggle is fully straightened and said ram travels through the remainder of its working stroke.
Claim 8
Dependent Claim
332 words
In a toggle type hand tool of the type comprising a frame and having a fixed handle extending therefrom, a movable handle pivoted to said frame on a first pivotal axis, said handle being movable toward and away from said fixed handle, a ram reciprocably supported on said frame, toggle means comprising first and second toggle links, said first toggle link being pivoted to said frame and to said second toggle link, said second toggle link being pivoted to said ram whereby, upon straightening said toggle means, said ram is driven through its working stroke, the improvement to said apparatus comprising: a connecting link, said connecting link being pivoted at one of its ends to said first toggle link and having another end which is proximate to said movable handle, slot means in said movable handle, said slot means having a first end which is proximate to said first pivotal axis and a second end which is remote from said first pivotal axis, said other end of said connecting link being pivoted in said slot means, and ratchet means effective between said ram and said frame, said ratchet means being effective to prevent retrograde movement of said ram when said ram is at an intermediate position in its working stroke whereby, at the beginning of the stroke of said ram, said toggle is broken, said movable handle is in its open position, and said connecting link is pivoted to said movable handle at said other end of said slot means, and upon a first stroke of said movable handle towards said fixed handle, said handle is partially straightened and said ram is driven through a major portion of its working stroke, and upon opening said handle, said ram remains stationary and said other end of said connecting link moves to said first end of said slot means, and upon closing said movable handle a second time, said toggle is fully straightened and said ram travels through the remainder of its working stroke.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |