US3758016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tacker
Assignee: Swingline Inc
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Filing: 1971-10-18
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Granted: 1973-09-11
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Expires: 1991-10-18
Abstract
Abstract A gun-type manually operable tool for firing a fastening element such as a staple into a work piece is disclosed. The tool comprises a driving means including a spring loaded ram means movable through an arming and firing stroke into contact with a staple situated at the driving station of the tool. A movable means engageable with the ram means operates to move the ram means through the arming stroke and release means is provided for automatically effecting disengagement between the ram means and movable means at the completion of the arming stroke permitting movement of the ram means through the firing stroke. The tool is actuated by depressing a pivotally mounted actuating handle which is responsively connected to the movable means by a linkage means. The movable means includes a ram lifting member which is pivotally mounted on one link of the linkage means and the release means includes a pin element disposed in the path of movement of the ram lifting member; the pin acting as a cam to pivot the ram lifting element out of engagement with the ram at the completion of the arming stroke. Advantageously, the pin element also serves to pivotally mount the actuating handle. Also, the tool includes a magazine means for incrementally feeding fastening elements to the driving station and a window in the external housing of the tool having visual measuring means for determining the length of the fastening elements loaded in the tool.
Inventors
- 👤 N Olney
- 👤 A Hurkmans
- 👤 E Barrett
- 👤 M Leff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:46
CPC Classifications
B; B25; B25C; B25C5/00; B25C5/10; B25C1/00; B25C1/02; B25C5/16; F; F02; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
251 words
In a tool for driving a fastening element into a work piece which comprises a frame, magazine means mounted on the frame for incrementally feeding a fastening element to a driving station in the tool, spring loaded ram means mounted on the frame for upward movement through an arming stroke against the force of the spring in a direction away from the driving station and back toward the driving station through a firing stroke under the force of the spring into driving contact with an incrementally fed fastening element situated at the driving station and actuating means for moving the ram means through the arming stroke, the improvement wherein said actuating means includes: a. an operating handle mounted for pivotal movement between an open and closed position; b. a pivotally mounted and generally vertically moveable lifting member engageable with the ram means for advancing the ram means through the arming stroke, said lifting member having a sloping cam surface facing the ram means; c. linkage means pivoted on said frame connected between the handle on said frame and the lifting member; and d. pin means pivotally mounting the handle, said pin means being disposed in the path of longitudinal movement of the lifting member during the arming stroke at a position such that as the ram means approaches completion of the arming stroke said sloping cam surface contacts said pin means causing said lifting member to pivot out of engagement with the ram means whereby the firing stroke is automatically initiated.
Claim 2
Dependent Claim
251 words
In a tool for driving a fastening element into a work piece which comprises a frame, magazine means mounted on the frame for incrementally feeding a fastening element to a driving station in the tool, spring loaded ram means mounted on the frame for upward movement through an arming stroke against the force of the spring in a direction away from the driving station and back toward the driving station through a firing stroke under the force of the spring into driving contact with an incrementally fed fastening element situated at the driving station and actuating means for moving the ram means through the arming stroke, the improvement wherein said actuating means includes: a. an operating handle mounted for pivotal movement between an open and closed position; b. a pivotally mounted and generally vertically moveable lifting member engageable with the ram means for advancing the ram means through the arming stroke, said lifting member having a sloping cam surface facing the ram means; c. linkage means pivoted on said frame connected between the handle on said frame and the lifting member; and d. pin means pivotally mounting the handle, said pin means being disposed in the path of longitudinal movement of the lifting member during the arming stroke at a position such that as the ram means approaches completion of the arming stroke said sloping cam surface contacts said pin means causing said lifting member to pivot out of engagement with the ram means whereby the firing stroke is automatically initiated.
Claim 3
Dependent Claim
29 words
gradation marks carried by the housing alongside said window, said gradation marks being relatively spaced in increments indicative of the length of the fastening elements appearing through said window.
Claim 4
Dependent Claim
29 words
gradation marks carried by the housing alongside said window, said gradation marks being relatively spaced in increments indicative of the length of the fastening elements appearing through said window.
Claim 5
Dependent Claim
29 words
gradation marks carried by the housing alongside said window, said gradation marks being relatively spaced in increments indicative of the length of the fastening elements appearing through said window.
Claim 6
Dependent Claim
29 words
gradation marks carried by the housing alongside said window, said gradation marks being relatively spaced in increments indicative of the length of the fastening elements appearing through said window.
Claim 7
Dependent Claim
40 words
a second link pivotally connected at one of its ends to said handle and the other of its ends to one end of said first link, said lifting member being pivotally mounted on the other end of said first link.
Claim 8
Dependent Claim
40 words
a second link pivotally connected at one of its ends to said handle and the other of its ends to one end of said first link, said lifting member being pivotally mounted on the other end of said first link.
Claim 9
Dependent Claim
12 words
The improvement according to claim 1 wherein: a. said linkage means includes:
Claim 10
Dependent Claim
50 words
The improvement according to claim 2 wherein: a. said first link is biased for rotation in a direction such that said handle is biased toward the open position; and b. said lifting member is biased in a direction diverging away from said first link into engagement with said ram means.
Claim 11
Dependent Claim
46 words
The improvement according to claim 3 wherein said tool is equipped with a housing enclosing said actuating means and further including: a. indicator means for visually determining the size of fastening elements about to be delivered to the driving station for driving, said indicator means including:
Claim 12
Dependent Claim
46 words
The improvement according to claim 1 wherein said tool is equipped with a housing enclosing said actuating means and further including: a. indicator means for visually determining the size of fastening elements about to be delivered to the driving station for driving, said indicator means including:
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) | 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 |