# US 10,500,699 B2 · Hands-free dual clamp device

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- Number: US 10,500,699 B2
- Document ID: US10500699B2
- Status: Granted
- Kind: B2
- Application number: 15/828,363
- Filed: 2017-11-30
- Published: 2019-05-30
- Granted: 2019-12-10
- Earliest claimed: 2017-11-30
- Applicants: Michael Chau-Lun Chang
- Inventors: Michael Chau-Lun Chang
- Web page: https://patentgrep.com/patent/US10500699B2

## CPC

- B25B 5/003: {Combinations of clamps}
- B25B 5/062: {with clamping means pivoting around an axis parallel to the pressing direction}
- B25B 5/101: {C-clamps}
- B25B 5/102: {with at least one jaw sliding along a bar}
- B25B 5/163: {Jaws or jaw attachments}
- F16B 7/0493: {forming a crossed-over connection}
- F16B 2/12: using sliding jaws
- F16B 5/0275: {the screw-threaded element having at least two axially separated threaded portions (F16B5/0283 takes precedence)}
- F16B 7/0433: {for rods or tubes being in parallel relationship}
- B25B: TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
- F16B: DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING (couplings for transmitting rotation F16D)

## Abstract

A hands-free dual clamp device includes two clamping units, each having an upper clamping body, a lower clamping body, a mating portion, and a shaft module. The shaft module is spirally inserted through the upper and lower clamping bodies and is rotatable, so as to enable the upper and lower clamping bodies to be adjustable at angles with respect to each other and cooperatively form a clamping space for clamping an external object. A connecting module includes at least a connecting unit having two opposite end portions, which are respectively provided with a first connecting element and a second connecting element. The first connecting element connected to the mating portion of one of the clamping units, and the second connecting element connected to the mating portions of the other of the clamping units, so that the two clamping units are linked together with the connecting module.

## Claims

### Claim 1

A hands-free dual clamp device, comprising:
two clamping units, each of the clamping units comprising an upper clamping body, a lower clamping body, a mating portion disposed on one end of the upper clamping body, and a shaft module, one end of the lower clamping body pivotally connected to the one end of the upper clamping body, the shaft module spirally inserted through the upper and lower clamping bodies and being rotatable, so as to enable the upper and lower clamping bodies to be adjustable at angles with respect to each other and cooperatively form a clamping space for clamping an external object; and
a connecting module comprising at least a connecting unit having two opposite end portions, one of the end portions provided with a first connecting element, the other end portion provided with a second connecting element, the first connecting element connected to the mating portion of one of the clamping units, and the second connecting element connected to the mating portions of the other one of the clamping units, so that the two clamping units are linked together with the connecting module;
wherein the upper clamping body and the lower clamping body respectively define a root portion located adjacent to the mating portion, the shaft module comprises an outer shaft, an inner shaft, and two sleeve pieces respectively disposed in the root portions of the upper and lower clamping bodies, and the sleeve pieces of the upper and lower clamping bodies are rotatable in the root portions, so that the outer shaft and the inner shaft are capable of swinging with respect to the sleeve pieces when the outer shaft rotates, whereby quickly adjusting a size of the clamping space between the upper and lower clamping bodies.

### Claim 2 (depends on 1)

The hands-free dual clamp device of claim 1, wherein the outer and inner shafts respectively form threads, the outer shaft is spirally connected with the sleeve piece of the upper clamping body, and a part of the inner shaft is spirally engaged into the outer shaft, and another part of the inner shaft is spirally connected with the sleeve piece of the lower clamping body.

### Claim 3 (depends on 2)

The hands-free dual clamp device of claim 2, wherein the threads of the outer shaft spiral in a direction opposite to that of the inner shaft, and the inner shaft is coaxially rotatable in the sleeve piece of the lower clamping body in conjunction with rotation of the outer shaft.

### Claim 4 (depends on 1)

The hands-free dual clamp device of claim 1, wherein at least one of the upper clamping bodies comprises two claws extending from the root portion and being spaced apart to form an interval, and the corresponding lower clamping body is capable of being adjusted by the shaft module to move into the interval.

### Claim 5 (depends on 1)

The hands-free dual clamp device of claim 1, wherein each of the root portions of the upper clamping body and the lower clamping body has a track slot formed thereon and penetrating the root portion, and the track slots are respectively configured to provide a space for the outer shaft and the inner shaft to swing therein.

### Claim 6 (depends on 1)

The hands-free dual clamp device of claim 1, wherein the connecting module comprises the two connecting units and an extending rod having two ends to connect the two connecting units, and the extending rod is extendable in length, adjustable at angles, and is bendable.

### Claim 7 (depends on 1)

The hands-free dual clamp device of claim 1, wherein the connecting module comprises the two connecting units and a chain element for linking the two connecting units.

### Claim 8 (depends on 1)

The hands-free dual clamp device of claim 1, wherein the first connecting element and the second connecting element respectively protrude inward to form a hole-shaped configuration, and the mating portions of the two clamping units protrude out of the upper clamping bodies to be connected to the first and second connecting elements.

### Claim 9 (depends on 1)

The hands-free dual clamp device of claim 1, wherein the connecting module comprises the two connecting units and a universal joint which connects the two connecting units.