Title:
一定力レールクランプ
Document Type and Number:
Japanese Patent JP4977251
Kind Code:
B2
Abstract:
A rail clamp comprises a frame and a pair of levers. Each of the levers has a brake pad at a first end thereof, a cam follower at second end thereof, and is mounted to the frame by a pivot disposed between said first and second ends. A cam is disposed between the levers and a spring biases the cam in a first direction. A clamp release actuator is operable to displace the cam in a second direction. The second direction is opposite to the first direction. A pair of variably sloped cam surfaces are disposed on opposite sides of the cam. Each of the variably sloped cam surfaces is in contact with the cam follower of a corresponding one of the levers, and each of the variably sloped cam surfaces has a slope which varies to counteract variations in a spring force of the spring as the cam is displaced, thereby maintaining a constant clamping force.
Inventors:
Barryant Igor
Application Number:
JP2010543347A
Publication Date:
July 18, 2012
Filing Date:
January 22, 2009
Export Citation:
Assignee:
Hilmer Industries Limited
International Classes:
B61H7/12; F16D65/16; B66B5/18; F16D65/14; F16D65/22
Domestic Patent References:
| JP49140858U | ||||
| JP2002104186A | ||||
| JP57071825U | ||||
| JP56025838U | ||||
| JP2008291880A |
Foreign References:
| US5353895 |
Attorney, Agent or Firm:
Hitoshi Shinbo