Mechanism to restrain slamming of shovel dipper doors
First Claim
1. In a shovel dipper having a generally box shape defined by interconnected front, back and side walls and an open top, a door pivotally attached to said back wall, and means operably associated with said dipper for opening and closing said door, the improvement comprising an energy dissipation mechanism to restrain slamming of said door upon closing thereof, said mechanism including a first arm connected at one end thereof to said back wall and a second arm connected at one end thereof to said door, said first and second arms on the other ends thereof being in superposed relation and having a friction liner therebetween, and Belleville spring-loaded bolt means pivotally securing said other ends together whereby said spring is adapted to exert substantially the same restraining force during a substantial portion of the life of said liner.
1 Assignment
0 Petitions
Accused Products
Abstract
A mechanism to restrain slamming of shovel dipper doors including a pair of arms connected respectively to the back and door of a shovel dipper and pivotally interconnected together with a Belleville spring loading.
22 Citations
9 Claims
- 1. In a shovel dipper having a generally box shape defined by interconnected front, back and side walls and an open top, a door pivotally attached to said back wall, and means operably associated with said dipper for opening and closing said door, the improvement comprising an energy dissipation mechanism to restrain slamming of said door upon closing thereof, said mechanism including a first arm connected at one end thereof to said back wall and a second arm connected at one end thereof to said door, said first and second arms on the other ends thereof being in superposed relation and having a friction liner therebetween, and Belleville spring-loaded bolt means pivotally securing said other ends together whereby said spring is adapted to exert substantially the same restraining force during a substantial portion of the life of said liner.
Specification