US3687060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety gate for presses
Assignee: Individual
•
Filing: 1970-12-03
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Granted: 1972-08-29
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Expires: 1990-12-03
Abstract
Abstract A press having a ram adapted to move vertically toward a die surface, including a safety gate automatically swingable to move in front of the die facade. The gate is mounted at the end of a pair of parallel arms pivotally connected to the ram so that the arms and gate are conjointly movable in the vertical direction with the ram. The arms are simultaneously linked to the frame of the press by a crank lever system so that the downward vertical movement of the ram swings the gate in front of the die facade in advance of the closing of the ram.
Inventors
- 👤 Masahiro Komori
- 👤 Takehiko Komori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:33
CPC Classifications
F; F16; F16P; F16P3/00; F16P3/001; F16P3/006
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
199 words
Safety apparatus for a press or the like, which comprises a frame, a base supported on said frame, a ram disposed above the base and mounted to reciprocate vertically with respect thereto, the base and ram carrying mating dies for manipulating a workpiece therebetween on the downward movement of the ram, said apparatus comprising a gate, movable support means for moving said gate between a first position to the side of said ram to expose said dies and to a second position in front of said dies to shield the same, said movable support means being directly connected to said ram so as to be shiftable from said first to said second position on the downward movement thereof and from said second to said first position on upward movement thereof, and said support means comprising a pair of parallel arms, said arms being pivoted at one end to said gate and at the other end to said ram, one of said arms having an angularly extending crank lever and connecting link means joining said crank lever to the frame whereby, on movement of said ram, said crank lever causes said arms to move between the first and second positions.
Claim 2
Dependent Claim
199 words
Safety apparatus for a press or the like, which comprises a frame, a base supported on said frame, a ram disposed above the base and mounted to reciprocate vertically with respect thereto, the base and ram carrying mating dies for manipulating a workpiece therebetween on the downward movement of the ram, said apparatus comprising a gate, movable support means for moving said gate between a first position to the side of said ram to expose said dies and to a second position in front of said dies to shield the same, said movable support means being directly connected to said ram so as to be shiftable from said first to said second position on the downward movement thereof and from said second to said first position on upward movement thereof, and said support means comprising a pair of parallel arms, said arms being pivoted at one end to said gate and at the other end to said ram, one of said arms having an angularly extending crank lever and connecting link means joining said crank lever to the frame whereby, on movement of said ram, said crank lever causes said arms to move between the first and second positions.
Claim 3
Dependent Claim
30 words
The apparatus of claim 1, wherein said arms and crank lever have stop means adapted to abut against the connecting link means during movement thereof to effect an over-the-center action.
Claim 4
Dependent Claim
17 words
The apparatus of claim 2, including resilient means for normally biasing said gate into said first position.
Claim 5
Dependent Claim
35 words
The apparatus of claim 3, wherein said connecting link means comprises a bracket affixed to said frame, and a rod extending outwardly therefrom and adjustably affixed thereto, said rod being linked to said crank lever.
Claim 6
Dependent Claim
46 words
The apparatus of claim 4, including link means connecting said rod to said crank lever, said link means being provided with a plurality of holes and means for connecting the end of said rod in a selected one of said holes to adjust the length thereof.
Claim 7
Dependent Claim
26 words
The apparatus of claim 5, wherein said connecting link means includes resilient buffer means whereby said connecting rod is variably movable with respect to said frame.
Claim 8
Dependent Claim
24 words
The apparatus of claim 6, wherein said resilient buffer means comprise a piston and cylinder, and a spring biasing said piston within said cylinder.
References Cited (Backward Citations)
GB143471A
Cited
US1439818A
Cited
US1549740A
Cited
US1733227A
Cited
US2443726A
Cited
GB1006451A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |