Adjustable pole
An adjustable pole comprising an upper pole telescopically engaged with a lower pole. The adjustable pole further comprises a locking unit secured to an upper end of the lower pole. The locking unit comprises a housing having a lower bore engaged with the upper end of the lower pole. The housing further comprises an upper bore disposed above the lower bore for freely receiving the upper pole into and out of the lower pole. The housing further comprises a channel disposed adjacent the upper bore. The locking unit further comprises a lever rotatably supported within the channel between a locked position where the upper pole cannot move relative to the lower pole and an unlocked position where the upper pole may be moved. The lever comprises a tooth catch engaged with the upper pole and substantially shielded by the channel between the locked and unlocked positions.
1. An adjustable pole comprising:
a lower pole comprising an upper end;
an upper pole telescopically engaged with said lower pole;
a locking unit engaged with said upper end of said lower pole; said locking unit comprises:
a one-piece unitary housing comprising a lower bore engaged with said upper end of said lower pole and an upper bore freely guiding said upper pole into and out of said lower pole; said lower and upper bores have a common central axis; said housing further comprises a channel disposed adjacent said upper bore; said channel comprises a floor, left and right sidewalls, and a top wall; said housing further comprises a slot having a first portion disposed in said floor and a second portion disposed in said top wall an upper end of said first portion of slot is merged with said second portion of said slot to provide a continuous L-shaped slot to provide access between said channel and said upper pole disposed within said upper bore; and
a lever rotatably supported within said channel between a locked position where said upper pole cannot be moved and an unlocked position where said upper pole may be moved; said lever comprises a handle portion disposed outward of the channel and a tooth catch engaged with said upper pole in said locked position; said tooth catch is substantially shielded by said top wall and said left and right sidewalls of said channel between said locked and unlocked positions.
2. The adjustable pole of claim 1 , further comprising a spring having a base portion engaged with said floor and an upper portion engaged with said lever; said spring is biased to force said tooth catch into contact with said upper pole.
3. The adjustable pole assembly of claim 2 , further comprising a pin extending between said left and right sidewalls of said channel; said lever pivots about said pin.
4. The adjustable pole of claim 3 , wherein said base portion of said spring has a pair of elongated members engaged with said floor and said upper portion has an elongated loop portion engaged with said handle of said lever.
5. The adjustable pole of claim 4 , further comprising a thumb grip engaged with said handle portion of said lever; said thumb grip comprises a seat engaged with said elongated loop portion of said spring.
6. The adjustable pole of claim 5 , wherein said thumb grip further comprises a channel engaged with said handle portion of said lever.
7. The adjustable pole of claim 6 , wherein said lower bore comprises an annular wall having first and second openings; the upper end of the lower pole has first and second protrusions; said first and second openings of said lower bore are securely engaged with the first and second protrusions of the lower pole, respectively.
8. The adjustable pole of claim 7 , wherein said lower bore has a diameter D 1 ; said upper bore has a diameter D 2 ; said diameter D 1 of said lower bore is larger than said diameter D 2 of said upper bore preventing said upper end of said lower pole from entering said upper bore.
9. The adjustable pole of claim 1 , wherein said housing is made from plastic.
10. The adjustable pole of claim 1 , wherein said tooth catch of said lever comprises forward and rear edges.
11. A locking unit for use with an upper pole telescopically engaged with a lower pole; the locking unit comprising:
a one-piece unitary housing comprising a lower bore engaged with the upper end of the lower pole and an upper bore freely guiding the upper pole into and out of the lower pole; said lower and upper bores have a common central axis; said housing further comprises a channel disposed adjacent said upper bore; said channel comprises a floor, left and right sidewalls, and a top wall; said housing further comprises a slot having a first portion disposed in said floor and a second portion disposed in said top wall an upper end of said first portion of slot is merged with said second portion of said slot to provide a continuous L-shaped slot to provide access between said channel and the upper pole disposed within said upper bore; and
a lever rotatably supported within said channel between a locked position where said upper pole cannot be moved and an unlocked position where said upper pole may be moved; said lever comprises a handle portion disposed outward of the channel and a tooth catch engaged with said upper pole in said locked position; said tooth catch is substantially shielded by said top wall and said left and right sidewalls of said channel between said locked and unlocked positions.
12. The locking unit of claim 11 , further comprising a spring having a base portion engaged with said floor and an upper portion engaged with said lever; said spring is biased to force said tooth catch into contact with the upper pole.
13. The locking unit of claim 12 , further comprising a pin extending between said left and right sidewalls of said channel; said lever pivots about said pin.
14. The locking unit of claim 13 , wherein said base portion of said spring has a pair of elongated members engaged with said floor and said upper portion has an elongated loop portion engaged with said handle of said lever.
15. The locking unit of claim 14 , further comprising a thumb grip engaged with said handle portion of said lever; said thumb grip comprises a seat engaged with said elongated loop portion of said spring.
16. The locking unit of claim 15 , wherein said thumb grip further comprises a channel engaged with said handle portion of said lever.
17. The locking unit of claim 16 , wherein said lower bore comprises an annular wall having first and second openings adapted to engage with first and second protrusions of the lower pole, respectively.
18. The locking unit of claim 17 , wherein said lower bore has a diameter D 1 ; said upper bore has a diameter D 2 ; said diameter D 1 of said lower bore is smaller than said diameter D 2 of said upper bore preventing said upper end of said lower pole from entering said upper bore.
19. The locking unit of claim 18 , wherein said housing is made from plastic.
20. The locking unit of claim 19 , wherein said tooth catch of said lever comprises forward and rear edges.