US3896957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roll clamp
Assignee: Security Pacific Business Credit Inc
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Filing: 1974-05-08
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Granted: 1975-07-29
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Expires: 1994-05-08
Abstract
Abstract A roll clamp which is used for moving paper rolls or other objects of various sizes from one place to another. The roll clamp, which can be rotated 360* in a vertical plane with respect to the truck to which it is attached, includes a rotatable frame, two clamp arms, a pin for attachment of the clamp arms to the rotatable frame, a first piston and cylinder assembly connected between the clamp arms for rotating the clamp arms with respect to each other about the pin, and a second piston and cylinder assembly connected to the rotatable frame and one of the clamp arms for simultaneous rotation of the clamp arms about the pin. The pin is located adjacent to the rotatable frame and is offset from the center line of rotation of the rotatable frame. The first piston and cylinder assembly is located within the open center of the rotatable frame, while the second assembly is located within the body of one of the clamp arms.
Inventors
- 👤 Stuart Wallace Sinclair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:19
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/12; B66F9/18; B66F9/184; Y; Y10; Y10S; Y10S414/00; Y10S414/124
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
149 words
An apparatus for use on a lift truck elevator, which is attached to a truck or other suitable means of transportation, to lift and manipulate a cylindrical load comprising: a. a rotating frame, b. a first clamp arm, c. a second clamp arm, d. a pin for attaching the clamp arms to the rotating frame and about which the clamp arms are rotatable, where the pin is located adjacent to, and less than the diameter of one cylindrical load from, the rotating frame and is offset from the centerline of rotation of the rotating frame, e. a first piston and cylinder assembly connected between the clamp arms for rotating the clamp arms with respect to each other about the pin, and f. a second piston and cylinder assembly connected to the rotating frame and one of the clamp arms for simultaneous rotation of the clamp arms about the pin.
Claim 2
Independent Claim
149 words
An apparatus for use on a lift truck elevator, which is attached to a truck or other suitable means of transportation, to lift and manipulate a cylindrical load comprising: a. a rotating frame, b. a first clamp arm, c. a second clamp arm, d. a pin for attaching the clamp arms to the rotating frame and about which the clamp arms are rotatable, where the pin is located adjacent to, and less than the diameter of one cylindrical load from, the rotating frame and is offset from the centerline of rotation of the rotating frame, e. a first piston and cylinder assembly connected between the clamp arms for rotating the clamp arms with respect to each other about the pin, and f. a second piston and cylinder assembly connected to the rotating frame and one of the clamp arms for simultaneous rotation of the clamp arms about the pin.
Claim 3
Dependent Claim
40 words
The invention of claim 1 wherein the rotating frame includes an open center space and the first piston and cylinder assembly is located within the open center space in order to reduce the overhang or overturn moment of the assembly.
Claim 4
Dependent Claim
32 words
The invention of claim 1 wherein the second piston and cylinder assembly is located within the clamp arm to prevent its interference with any load which is being carried by the clamp.
Claim 5
Dependent Claim
29 words
The invention of claim 1 wherein the first clamp arm includes an extension which extends past the pin and which is connected to the first piston and cylinder assembly.
Claim 6
Independent Claim
215 words
An apparatus for use on a lift elevator, which is attached to a truck or other suitable means of transportation, to lift and manipulate a cylindrical load comprising: a. a rotating frame, which includes an open center space, b. a first clamp arm which includes an extension, c. a second clamp arm, d. a pin for attaching the clamp arms to the rotating frame and about which the clamp arms are rotatable, where the pin is located adjacent to the rotating frame and is offset from the center line of rotation of the rotating frame, e. a first piston and cylinder assembly which is located within the open center space of the rotating frame in order to reduce the overhang or overturn moment of the assembly and which is connected to the extension of the first clamp arm and to the second clamp arm for rotating the clamp arms with respect to each other about the pin, and f. a second piston and cylinder assembly which is connected to the rotating frame and one of the clamp arms for simultaneous rotation of the clamp arms about the pin and which is located within the clamp arm to which it is attached to prevent its interference with any load which is being carried by the clamp.
Claim 7
Independent Claim
215 words
An apparatus for use on a lift elevator, which is attached to a truck or other suitable means of transportation, to lift and manipulate a cylindrical load comprising: a. a rotating frame, which includes an open center space, b. a first clamp arm which includes an extension, c. a second clamp arm, d. a pin for attaching the clamp arms to the rotating frame and about which the clamp arms are rotatable, where the pin is located adjacent to the rotating frame and is offset from the center line of rotation of the rotating frame, e. a first piston and cylinder assembly which is located within the open center space of the rotating frame in order to reduce the overhang or overturn moment of the assembly and which is connected to the extension of the first clamp arm and to the second clamp arm for rotating the clamp arms with respect to each other about the pin, and f. a second piston and cylinder assembly which is connected to the rotating frame and one of the clamp arms for simultaneous rotation of the clamp arms about the pin and which is located within the clamp arm to which it is attached to prevent its interference with any load which is being carried by the clamp.
References Cited (Backward Citations)
US3583586A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |