US3754492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet cutting apparatus
Assignee: IPEC Inc
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Filing: 1971-10-07
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Granted: 1973-08-28
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Expires: 1991-10-07
Abstract
Abstract Sheet cutting apparatus powered wholly by hydraulics including a blade for cutting and a hydraulically operated clamping bar for holding the sheet material in place for cutting after clamping has been effected.
Inventors
- 👤 E Krauss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:58
CPC Classifications
B; B26; B26D; B26D7/00; B26D7/20; Y; Y10; Y10T; Y10T83/00; Y10T83/566; Y10T83/5669; Y10T83/5715; Y10T83/5787; Y10T83/5805; Y10T83/748; Y10T83/7487; Y10T83/7547; Y10T83/869; Y10T83/8821; Y10T83/8858; Y10T83/929; Y10T83/9309
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
210 words
Apparatus for cutting sheet material comprising: 1. a bed for supporting the sheet material; 2. first hydraulically operated means for clamping said sheet material to said bed; 3. a cutting blade; 4. second hydraulically operated means for actuating said cutting blade downwardly through said sheet material; 5. a hydraulic control system for controlling the operation of said clamping means and said blade including a. a first source of fluid under pressure, b. a first manually operated valve means hydraulically connected to said first source of fluid, c. a second manually and hydraulically operated valve means hydraulically connected to said first valve means and to said first and second hydraulically operated means, d. said first valve means adapted to selectively transmit said fluid to said second valve means, e. said second valve means movable to a first position for transmitting said fluid from said first valve means to said first hydraulically operated means to actuate said clamping means whereby the pressure of said fluid increases from a lower pressure to a higher pressure as the actuation of said clamping means is complete, f. said second valve means manually movable to a second position as said fluid attains said higher pressure whereby said fluid is transmitted to said second hydraulically operated means.
Claim 2
Dependent Claim
210 words
Apparatus for cutting sheet material comprising: 1. a bed for supporting the sheet material; 2. first hydraulically operated means for clamping said sheet material to said bed; 3. a cutting blade; 4. second hydraulically operated means for actuating said cutting blade downwardly through said sheet material; 5. a hydraulic control system for controlling the operation of said clamping means and said blade including a. a first source of fluid under pressure, b. a first manually operated valve means hydraulically connected to said first source of fluid, c. a second manually and hydraulically operated valve means hydraulically connected to said first valve means and to said first and second hydraulically operated means, d. said first valve means adapted to selectively transmit said fluid to said second valve means, e. said second valve means movable to a first position for transmitting said fluid from said first valve means to said first hydraulically operated means to actuate said clamping means whereby the pressure of said fluid increases from a lower pressure to a higher pressure as the actuation of said clamping means is complete, f. said second valve means manually movable to a second position as said fluid attains said higher pressure whereby said fluid is transmitted to said second hydraulically operated means.
Claim 3
Dependent Claim
12 words
first hydraulically operated means for clamping said sheet material to said bed;
Claim 4
Dependent Claim
12 words
first hydraulically operated means for clamping said sheet material to said bed;
Claim 5
Dependent Claim
132 words
Apparatus for cutting sheet material comprising: a bed for supporting the sheet material, hydraulically operated means for clamping said sheet material to said bed, a cutting blade, hydraulically operated means for actuating said cutting blade downwardly through said sheet material, said bed including a U-shaped channel member disposed below said blade with the open end of said U-shaped channel member even with the upper surface of said bed, a rigid plate supported within said channel, a resilient anvil supported by said plate with its top surface even with the upper surface of said bed, inflatable tube means disposed within said U-shaped channel below said rigid plate, and means for selectively inflating said tube to force said plate and said anvil upwardly and raise said anvil above the upper surface of said bed.
Claim 6
Dependent Claim
132 words
Apparatus for cutting sheet material comprising: a bed for supporting the sheet material, hydraulically operated means for clamping said sheet material to said bed, a cutting blade, hydraulically operated means for actuating said cutting blade downwardly through said sheet material, said bed including a U-shaped channel member disposed below said blade with the open end of said U-shaped channel member even with the upper surface of said bed, a rigid plate supported within said channel, a resilient anvil supported by said plate with its top surface even with the upper surface of said bed, inflatable tube means disposed within said U-shaped channel below said rigid plate, and means for selectively inflating said tube to force said plate and said anvil upwardly and raise said anvil above the upper surface of said bed.
Claim 7
Dependent Claim
148 words
Apparatus for cutting sheet material comprising: a bed for supporting the sheet material, hydraulically operated means for clamping said sheet material to said bed, a cutting blade, hydraulically operated means for actuating said cutting blade downwardly through said sheet material, said blade actuating means including a source of pressurized fluid, a hydraulic power cylinder connected to said blade, said hydraulic power cylinder comprising a hollow cylindrical body, a piston adapted for longitudinal sliding movement within said cylinder, an operating shaft connected to said piston and extending through a wall closing one end of said body, and a stop sleeve surrounding said shaft at said one end, said sleeve having threads adapted to cooperate with corresponding threads provided in said wall, the inner end of said sleeve being adapted to engage and stop said piston at a position determined by the position of said sleeve relative to said wall.
Claim 8
Dependent Claim
148 words
Apparatus for cutting sheet material comprising: a bed for supporting the sheet material, hydraulically operated means for clamping said sheet material to said bed, a cutting blade, hydraulically operated means for actuating said cutting blade downwardly through said sheet material, said blade actuating means including a source of pressurized fluid, a hydraulic power cylinder connected to said blade, said hydraulic power cylinder comprising a hollow cylindrical body, a piston adapted for longitudinal sliding movement within said cylinder, an operating shaft connected to said piston and extending through a wall closing one end of said body, and a stop sleeve surrounding said shaft at said one end, said sleeve having threads adapted to cooperate with corresponding threads provided in said wall, the inner end of said sleeve being adapted to engage and stop said piston at a position determined by the position of said sleeve relative to said wall.
Claim 9
Dependent Claim
3 words
a cutting blade;
Claim 10
Dependent Claim
3 words
a cutting blade;
Claim 11
Dependent Claim
14 words
second hydraulically operated means for actuating said cutting blade downwardly through said sheet material;
Claim 12
Dependent Claim
14 words
second hydraulically operated means for actuating said cutting blade downwardly through said sheet material;
Claim 13
Dependent Claim
71 words
The apparatus of claim 1 wherein the apparatus includes a supporting frame and said blade actuating means includes a pair of links each pivotally connected to said frame so that said blade pivots simultaneously about spaced apart axes as it moves downwardly through said sheet material, means associated with at least one of said links for adjusting the length of said link whereby the attitude of said blade may be regulated.
Claim 14
Dependent Claim
163 words
a hydraulic control system for controlling the operation of said clamping means and said blade including a. a first source of fluid under pressure, b. a first manually operated valve means hydraulically connected to said first source of fluid, c. a second manually and hydraulically operated valve means hydraulically connected to said first valve means and to said first and second hydraulically operated means, d. said first valve means adapted to selectively transmit said fluid to said second valve means, e. said second valve means movable to a first position for transmitting said fluid from said first valve means to said first hydraulically operated means to actuate said clamping means whereby the pressure of said fluid increases from a lower pressure to a higher pressure as the actuation of said clamping means is complete, f. said second valve means manually movable to a second position as said fluid attains said higher pressure whereby said fluid is transmitted to said second hydraulically operated means.
Claim 15
Dependent Claim
163 words
a hydraulic control system for controlling the operation of said clamping means and said blade including a. a first source of fluid under pressure, b. a first manually operated valve means hydraulically connected to said first source of fluid, c. a second manually and hydraulically operated valve means hydraulically connected to said first valve means and to said first and second hydraulically operated means, d. said first valve means adapted to selectively transmit said fluid to said second valve means, e. said second valve means movable to a first position for transmitting said fluid from said first valve means to said first hydraulically operated means to actuate said clamping means whereby the pressure of said fluid increases from a lower pressure to a higher pressure as the actuation of said clamping means is complete, f. said second valve means manually movable to a second position as said fluid attains said higher pressure whereby said fluid is transmitted to said second hydraulically operated means.
Claim 16
Dependent Claim
43 words
The apparatus of claim 1 including: third valve means hydraulically connected to said second valve means and to said second hydraulically operated means for preventing said fluid from being transmitted to said second hydraulically operated means until said fluid reaches a predetermined pressure.
Claim 17
Dependent Claim
64 words
The apparatus of claim 1 including: additional hydraulically operated means operably connected to said means for clamping said sheet material to said bed; a second source of fluid supplying said fluid at a pressure less than the pressure of said first source of fluid; and additional manually operated valve means for selectively transmitting fluid at said lesser pressure to said additional hydraulically operated means.
Claim 18
Dependent Claim
67 words
The apparatus of claim 1 including: releasable stop means associated with said second valve biased to positively hold said second valve means in said first position; said releasable stop means adapted to move against said bias under the influence of said fluid at said second higher pressure whereby said second valve means is permitted to move to said second position under the influence of said manual operation.
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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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |