Back to results
US 4,515,248 AGranted
Buffer device for elevator
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorKazutoshi Ohta
Life of this patent
Estimating the term…
Abstract
A buffer device for an elevator employs, as a buffer member, a foamed plastic material such as polyurethane foam which undergoes very little permanent deformation upon receipt of an impact. The foamed plastic material is accommodated in a box made of a thin non-combustible material, and a heat-insulating material is disposed between the box and the buffer member in the box.
Claims12
An elevator comprising:
- a cage frame having a floor, spaced vertical support posts, and a buffer receiver opposed to said floor;
- and
- a buffer having an upper surface below and aligned with a lower surface of said buffer receiver so as to mate therewith and uniformly receive the weight of said cage frame when said cage frame falls vertically downwardly thereon;
- said buffer including
- a box formed of thin non-combustible material having said upper surface,
- a compressible box-shaped buffer member formed of foamed plastic material accommodated in said box, spaced from the peripheral walls thereof, and
- heat-insulating material disposed between said peripheral walls of said box and said foamed plastic material.
4 more elements
An elevator comprising:
- a cage frame having spaced vertical support posts and a cage floor;
- an open rectangular base buffer receiver at the periphery of said cage frame opposed to said cage floor;
- and
- a buffer having an open rectangular upper surface below and aligned with a lower surface of said buffer receiver so as to mate therewith and uniformly receive the weight of said cage frame when said cage frame falls vertically downwardly thereon;
- said buffer including
- an open rectangular box formed of thin non-combustible material having said open rectangular upper surface,
- a compressible open rectangular box-shaped buffer member formed of foamed plastic material accomodated in said box, spaced from the peripheral walls thereof, and
- heat-insulating material disposed between said peripheral walls of said box and said foamed plastic material.
5 more elements
Dependencies are inferred from the claim text.