1. A differential device operable selectively in a non-differential operation mode and a differential operation mode, comprising:
a ball member;
a ball retaining member rotatable with a driving rotational member and extending along opposed axial end portions of left and right drive shafts, said ball member being disposed between said ball retaining member and the opposed axial end portions of the left and right drive shafts, said ball retaining member having a through-hole portion formed therein to receive part of said ball member;
a shift member fitted over said ball retaining member and including: a ball-restricting portion of an inner diameter generally equal to an outer diameter of said ball retaining member; and a ball-releasing portion having a greater inner diameter than the ball-restricting portion;
an actuator for sliding said shift member, along said ball retaining member, from a ball-releasing position to a ball-restricting position when said non-differential operation mode is selected, but from the ball-restricting position to the ball-releasing position when said differential operation mode is selected; and
a pair of opposed power-transmitting portions provided on respective ones of the axial ends of the left and right drive shafts and together defining a recessed portion of a predetermined sectional shape such that, when said shift member is in the ball-restricting position, said ball member is placed, via the ball-restricting portion, in engagement with the power-transmitting portions to thereby transmit a driving power from the rotational member to both of the left and right drive shafts, but, when said shift member is in the ball-releasing position, said ball member is allowed to move radially outward into engagement with only one of the power-transmitting portions to thereby permit differential rotation of the left and right drive shafts.
2. A differential device as claimed in claim 1 wherein a plurality of said ball members are provided in spaced-apart relation to each other along a circumferential direction of the axial end portions of the left and right drive shafts, and wherein a plurality of the pairs of the opposed power-transmitting portions are provided in spaced-apart relation to each other along the circumferential direction of the axial end portions, and pairs of non-power-transmitting portions are formed, on the opposed axial end portions of the left and right drive shafts, between the pairs of the power-transmitting recessed portions.
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 on-the-go field erectable assault course comprising:
a first plurality of panels arrangeable in a closed perimeter, each of said plurality of panels having a bullet-retaining member secured thereto;
a base for supporting said plurality of panels, said base supporting said plurality of panels in an erect condition;
a second plurality of panels, said second plurality of panels having a bullet retaining member on opposite faces thereof, said second plurality of panels positioned within the closed perimeter to form a divider wall for preventing penetration of a bullet from either side of said divider wall; and
fasteners for securing the first plurality of panels to said base.
2. The on-the-go field erectable assault course of claim 1 including a set of securement members holding each of the panels in a fixed upright condition.
3. The on-the-go field erectable assault course of claim 2 including at least one panel with an opening therein for entry by a person.
4. The on-the-go field erectable assault course of claim 3 including a top securing member for securing a top of each of the panels in the upright condition.
5. The on-the-go field erectable assault course of claim 4 including a set of bolt fasteners for securing each of the panels to said base and to said top securing member.
6. The on-the-go field erectable assault course of claim 1 including
a catwalk extending around the perimeter of the enclosure to permit a person to view assault activities within the enclosure.
7. The on-the-go field erectable assault course of claim 1 wherein the base comprises an elongated member having a length greater than the width of each of said panels to thereby enable the base to support a portion of at least two panels.
8. The on-the-go field erectable assault course of claim 1 wherein each of the panels are metal panels having a Brinell hardness of at least 500.
9. An on-the-go field erectable assault course comprising:
a plurality of panels, each of said plurality of panels having a bullet-retaining member secured thereto;
a base for supporting said plurality of panels, said base supporting said plurality of panels in an erect condition;
a catwalk extending around the perimeter of the enclosure to permit a person to view assault activities within the enclosure; and
fasteners for securing the plurality of panels to said base.