E - Fixed Constructions – 05 – C
Patent
E - Fixed Constructions
05
C
E05C 17/04 (2006.01) E05C 17/30 (2006.01)
Patent
CA 2060824
A telescopic support arm includes an outside arm and an inside arm which are designed to slide freely each other, the outside arm having a slot and an abutting piece inside thereof, and the inside arm having a slot and rotatable stopping piece inside thereof. The stopping piece is rotated by the engagement with the end portions of the slots and the abutting piece so as to be projected out of or sink into the slots, and by its rotation the outside arm and the inside arm are free to slide each other in both the extending and contracting directions. The stopping piece is provided with a buffer mechanism which comprises a holding piece of the stopping piece , a spring for pulling the holding piece in, the contracting direction of the telescopic support arm, and a slot for slidably supporting a support shaft of the stopping piece. A rack with a tooth part is disposed in the outside arm along its longitudinal direction, while a locking piece with a pawl part is provided in the inside arm. While the support arm expands, the pawl part engages with each tooth of the tooth part one by one, so that the length of the support arm may be ajdusted by arresting the pawl part at a desired position.
Kabushikigaisha Yagi
Riches Mckenzie & Herbert Llp
LandOfFree
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