Lock bar for railroad gate warning mechanism
AssigneeSafetran Systems Corporation
InventorRichard C. Bohme
Life of this patent
Estimating the term…
Abstract
A lock bar for controlling the position of a railroad warning gate includes an elongated body portion extending between a first end and a second end, a clutch mechanism disposed in the elongated body, the clutch mechanism permitting rotational movement in one direction but restricting rotational movement in the opposite direction and a hub disposed in the clutch mechanism for engaging a portion of a motor drive mechanism for a railroad warning gate such that the gate is permitted to move in one direction but is restricted from movement in the opposite direction. Indicia are preferably disposed on the opposing edges to indicate the position that the warning gate will be retained in. An oblong aperture defined through the lock bar receives a pin to hold the lock bar in engagement with the motor drive mechanism.
Claims14
A lock bar for temporary installation on a portion of a motor drive mechanism of a railroad warning gate to temporarily retain the railroad warning gate in a raised position or in a lowered position, said lock bar comprising:
- a rigid elongated body portion extending between a first end and a second end and having first and second sides;
- a clutch mechanism disposed in the rigid elongated body portion intermediate the first end and the second end of the elongated body portion;
- and
- said clutch mechanism having an internally disposed female engagement surface for engaging a similarly shaped male portion of the motor drive mechanism when the rigid elongated body portion is temporarily fixed to the motor drive mechanism with its first and second sides in a given orientation such that the railroad warning gate is permitted to rotate in one direction but is restricted from rotation in an opposite direction, and said clutch mechanism also engaging a portion of the motor drive mechanism when the rigid elongated body portion is temporarily fixed to the motor drive mechanism with the orientation of said sides substantially reversed such that said warning gate is permitted to rotate in said opposite direction but is restricted from rotation in said one direction, said clutch mechanism receiving the portion of the motor drive mechanism of the railroad warning gate in either orientation of the first or second sides of the latch bar.
A lock bar for temporary installation on a portion of a motor drive mechanism of a railroad warning gate to temporarily retain the railroad warning gate in a raised position or in a lowered position, said lock bar comprising:
- a rigid elongated body portion extending between a first end and a second end;
- a clutch mechanism disposed in the rigid elongated body intermediate the first end and the second end of the elongated body portion, said clutch mechanism permitting rotational movement in one direction but restricting rotational movement in an opposite direction;
- said clutch mechanism engaging a portion of said motor drive mechanism when the lock bar is temporarily fixed thereon such that the railroad warning gate is permitted to move in one direction but is restricted from movement in the opposite direction;
- wherein said clutch mechanism comprises an internal hexagonal female surface and said portion of the motor drive mechanism includes a hexagonal shaft, said internal hexagonal female surface of the clutch mechanism receives said hexagonal shaft of said portion of said motor drive mechanism when said latch bar is temporarily fixed to said motor drive mechanism.
Dependencies are inferred from the claim text.