Elevator brake wedge

Patent metadata

Field	Value
Publication number	US-10214385-B2
Application number	US-201715415378-A
Country	US
Kind code	B2
Filing date	Jan 25, 2017
Priority date	Jan 25, 2017
Publication date	Feb 26, 2019
Grant date	Feb 26, 2019

Abstract

An elevator brake wedge is provided and includes an elongate body having first and second generally opposed major surfaces and first and second generally opposed minor surfaces. The second minor surface has a greater length than the first minor surface. Each of the first and second major surfaces extends between corresponding first and second ends of the first and second minor surfaces, respectively. The second major surface defines low-friction film securing grooves extending from a plane of the second major surface into the elongate body.

First claim

What is claimed is:

1. An elevator brake wedge, comprising:
an elongate body having first and second generally opposed major surfaces and first and second generally opposed minor surfaces,
the second minor surface having a greater length than the first minor surface,
each of the first and second major surfaces extending between corresponding first and second ends of the first and second minor surfaces, respectively, and
the second major surface defining low-friction film securing grooves extending from a plane of the second major surface into the elongate body,
wherein each of the low-friction film securing grooves has an elongate shape and is elongate in a dimension extending into the elongate body from a plane of the second major surface and comprises:
an axial end wall defining an end wall plane transversely oriented relative to the plane of the second major surface and comprising opposite first and second end wall ends;
a major sidewall which is longer than the axial end wall and which extends from the plane of the second major surface to the first end wall end; and
a minor sidewall which is parallel with and shorter than the major sidewall and which extends from the plane of the second major surface to the second end wall end.

2. The elevator brake wedge according to claim 1 , wherein:
the elongate body comprises metallic materials or metallic alloys, and
the low-friction film securing grooves are receptive of low-friction film handles.

3. The elevator brake wedge according to claim 1 , wherein a material of the second major surface directly and substantially non-adhesively contacts a material of a low-friction film.

4. An elevator brake, comprising:
first and second sliding guides supportable in a body on either side of a rail;
first and second brake wedges configured to assume respective non-braking and braking positions in the body between the sides of the rail and the first and second sliding guides, respectively,
each of the first and second brake wedges comprising:
a first major surface for engagement with the rail;
a second major surface generally opposite the first major surface and formed to define grooves; and
a single unitary low-friction film comprising contiguous sections and having handles at each of the contiguous sections which are receivable in the grooves to support the low-friction film at the second major surface for engagement with a corresponding one of the first and second sliding guides, wherein:
each of the grooves has an elongate shape and comprises:
an axial end wall defining an end wall plane transversely oriented relative to the plane of the second major surface and comprising opposite first and second end wall ends:
a major sidewall which is longer than the axial end wall and which extends from a plane of the second major surface to the first end wall end; and
a minor sidewall which is parallel with and shorter than the major sidewall and which extends from the plane of the second major surface to the second end wall end,

the single unitary low-friction film comprises a body with a major surface extending continuously along each of the contiguous sections and abutting with the second major surface, and
the handles of each of the contiguous sections are respectively receivable in the grooves to support the single unitary low-friction film at the second major surface for engagement with a corresponding one of the first and second sliding guides, each of the handles being elongate in a direction extending outwardly relative to the body from a plane of the major surface.

5. The elevator brake according to claim 4 , wherein:
each of the first and second brake wedges further comprises a first minor surface and a second minor surface generally opposed to and having a greater length than the first minor surface, and
the grooves extend from a plane of the second major surface toward a plane of the first major surface.

6. The elevator brake according to claim 4 , wherein:
the first and second brake wedges comprise metallic materials or metallic alloys, and
the low-friction film comprises at least one of filled or unfilled thermoplastic materials, filled or unfilled polymers, filled or unfilled thermoplastics and/or thermoset or epoxy materials with low friction additives.

7. The elevator brake according to claim 4 , wherein a material of the second major surface directly and substantially non-adhesively contacts a material of the low-friction film.

Assignees

• Otis Elevator Co

Inventors

• Eastman Scott Alan
• Guilani Brad
• Zhao Chen Qian
• Dube Randall S

Classifications

• B33Y10/00

  Processes of additive manufacturing · CPC title

• B22D25/02

  by its peculiarity of shape; of works of art {(cylinders, pistons B22D15/02)} · CPC title

• B29C45/14

  incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles {(B29C45/1671 takes precedence)} · CPC title

• B29C43/18

  incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles {(B29C43/206 takes precedence)} · CPC title

• B29K2705/00

  Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts · CPC title