1. A hand-held wire-wrapping or unwrapping gun, comprising:
a) a frame having user-accessible electrically-conductive elements,
b) a rotatable drive assembly journaled on said frame and including an electrically-conductive drive shaft coupled at a distal end to means for receiving and removably holding an electrically-conductive bit for wrapping or unwrapping a wire around an electrical terminal,
c) user-actuating means for driving the drive shaft and bit,
d) means for electrically-insulating the frame from the electrically-conductive drive shaft and the electrically-conductive bit, the means for electrically-insulating the frame comprising an electrically-insulated drive housing surrounding the drive shaft and bit and separating the latter from the frame’s electrically-conductive elements, the means for electrically-insulating the frame further comprising divided drive shaft portions and electrically-insulated means for coupling together the divided drive shaft portions, such that electrical shock to the user is avoided upon accidental contact between the user and one of the electrically-conductive elements of the frame when the tool bit during use contacts an electrically active electrical terminal.
2. A hand-held wire-wrapping or unwrapping gun as claimed in claim 1, further comprising an electrically-insulating outer coating on the frame.
3. A hand-held wire-wrapping or unwrapping gun as claimed in claim 1, wherein the electrically-insulated drive housing is part of the electrically-conductive bit holding means.
4. A hand-held wire-wrapping or unwrapping gun as claimed in claim 1, wherein the electrically-insulated drive housing comprises at an end remote from the user-actuating means a chuck or clamp for removably gripping and releasing the bit.
5. A hand-held wire-wrapping or unwrapping gun as claimed in claim 4, wherein the chuck or clamp comprises a rotatable collet constituted of electrically-insulated material.
6. A hand-held wire-wrapping gun, comprising:
a) an electrically-conductive frame having an electrically-insulating outer coating and also user-accessible exposed electrically-conductive elements,
b) a rotatable drive assembly journaled on said frame and including a electrically-conductive first shaft coupled to user-actuating means for driving the first shaft and at the distal end of the gun an axially-spaced electrically-conductive second drive shaft coupled to holding means for receiving and removably holding an electrically-conductive bit or bit-and-sleeve assembly for unwrapping or wrapping a wire around an electrical terminal when the bit is rotated,
c) electrically-insulated coupling means for connecting the first shaft to the second shaft such that rotation of the first shaft causes rotation of the second shaft,
d) the bit-and-sleeve holding means comprising a user-operated chuck or clamp for removably gripping and releasing the bit-and-sleeve assembly, the bit-and-sleeve holding means further comprising an electrically-insulating portion serving as a drive housing and surrounding the coupling means and second shaft and electrically-insulating the frame from the first and second shafts and adjacent bit or bit-and-sleeve, such that electrical shock to the user is avoided upon accidental contact between the user and one of the electrically-conductive elements of the frame when the tool bit during use contacts an active electrical terminal.
7. A hand-held wire-wrapping gun as claimed in claim 6, wherein the coupling and electrically-insulating portion of the bit-and-sleeve holding means comprises a plastic material.
8. A hand-held wire-wrapping gun as claimed in claim 6, wherein the coupling means is press-fitted to end portions of the first and second shafts.
9. A hand-held wire-wrapping gun as claimed in claim 6, wherein the frame comprises tabs for retaining the rotating components within the electrically-insulating drive housing.
10. A hand-held wire-wrapping gun as claimed in claim 9, further comprising a pin for retaining the electrically-insulating drive housing and maintaining the orientation of the second shaft.
11. A hand-held wire-wrapping gun as claimed in claim 6, further comprising user-actuating means for rotating the drive assembly, the drive assembly comprising a spur gear driving a pinion gear, the pinion gear being integral with the first shaft portion.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An overpack for storage and handling of containers for liquids, the overpack comprising:
a floor and a plurality of sides extending from the floor, wherein the floor and the sides define a top portion and a bottom portion, the top portion comprising one or more openings, wherein at least one of the openings is a drain capable of draining fluid from the overpack, and the bottom portion defining a continuous surface having no openings, wherein the bottom portion is constructed to provide spill containment;
an access opening defined by the sides and opposite of the floor, wherein the access opening is configured to allow for insertion and removal of a container; and
a lid removably secured to cover the access opening;
wherein the floor and the sides are integrally formed of plastic, the overpack is stackable, and wherein the overpack is adapted to receive a drum-shaped container having a volume of 200-500 liters.
2. The overpack of claim 1, the overpack further comprising walls, wherein the lid is arrangeable next to a wall of the overpack in an open position.
3. The overpack of claim 1, wherein the opening comprises recesses for access to inside of the overpack by a drum lift.
4. The overpack of claim 1, wherein the access opening comprises a rain drain to prevent fluids from entering the overpack when the access opening is closed by the lid.
5. The overpack of claim 1, wherein at least one wall of the overpack comprises at least one reinforcement rib.
6. The overpack of claim 5, wherein the at least one reinforcement rib is located vertically at the wall of the overpack.
7. The overpack of claim 1, wherein the overpack is made of a first material comprising plastic, and wherein the overpack is free of reinforcements made of a second material.
8. The overpack of claim 1, wherein the overpack is formed without undercuts.
9. The overpack of claim 1, wherein the drain comprises a cleaning opening for emptying a cleaning fluid from the overpack.
10. The overpack of claim 1, wherein the overpack has a base area of about 600 mm by 800 mm.
11. The overpack of claim 1, wherein the overpack comprises handling recesses.
12. The overpack of claim 11, wherein the handling recesses extend from one wall of the overpack an opposing wall of the overpack.
13. The overpack of claim 11, wherein the overpack comprises a base portion and wherein the handling recesses are located at the base portion of the overpack.
14. The overpack of claim 1, wherein the overpack does not comprise wheels for transportation.
15. A safety system for storage and handling of liquids comprising an overpack according to claim 1 and a container removably located inside the overpack.
16. The safety system of claim 15, wherein the container comprises a dry break system.
17. The safety system of claim 16, wherein the dry break system is configured differently for different products inside the container.
18. The safety system of claim 15, further comprising a liquid level indicator.
19. The safety system of claim 18, wherein the liquid level indicator is located outside the container in a top area of the container.