US 12,065,181 B2
Tamperproof gate mechanism
Daniel Spencer, Pittsburgh, PA (US); Brian Joseph Hogan, Temecula, CA (US); and Richard C. Bohme, Louisville, KY (US)
Assigned to Siemens Mobility, Inc., New York, NY (US)
Appl. No. 17/278,696
Filed by Siemens Mobility, Inc., New York, NY (US)
PCT Filed Nov. 13, 2019, PCT No. PCT/US2019/061136
§ 371(c)(1), (2) Date Mar. 23, 2021,
PCT Pub. No. WO2020/102317, PCT Pub. Date May 22, 2020.
Claims priority of provisional application 62/767,081, filed on Nov. 14, 2018.
Prior Publication US 2022/0041195 A1, Feb. 10, 2022
Int. Cl. B61L 29/00 (2006.01); B61L 29/04 (2006.01); B61L 29/10 (2006.01)
CPC B61L 29/10 (2013.01) [B61L 29/04 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A crossing gate mechanism comprising:
a linkage operably coupled to a crossing gate arm,
a housing, the linkage being positioned in the housing,
wherein the crossing gate arm is movable between a vertical position and a horizontal position via the linkage,
wherein the linkage is in a first position when the crossing gate arm is in the vertical position and in a second position when the crossing gate arm is in the horizontal position,
wherein the linkage in the second position mechanically locks the crossing gate arm in the horizontal position,
wherein the linkage comprises a gear that is configured as a segment gear, wherein teeth of the segment gear extend over a range of about 180°,
wherein a first spring buffer is arranged on an inner sidewall of the housing and serves as a stopping point for the segment gear when the crossing gate arm is in the horizontal position, and
wherein a second spring buffer is arranged on the inner sidewall of the housing and provides a resting location for the linkage in an unpowered descent of the crossing gate arm,
wherein the linkage comprises a first connecting member rotatably coupled at a first end to the crossing gate arm and a second connecting member rotatably coupled at a first end to the gear,
wherein the first connecting member and the second connecting member are coupled to each other at a connecting point at respective second ends, and
further comprising a third connecting member connected at a first end to a stationary part and at a second end to the connecting point of the first and second connecting members.