Platform centering device

• US 6,974,123 B2
• Filed: 04/03/2002
• Issued: 12/13/2005
• Est. Priority Date: 04/03/2002
• Status: Active Grant

• Current Assignee: Advance Lifts, Inc.
• Original Assignee: Advance Lifts, Inc.
• Inventors: Latvys, Evaldas
• Primary Examiner(s): Watson, Robert C.
• Application Number:
  US10/115,514
• Publication Number:
  US 20030189194A1
• Time in Patent Office: 1,350 Days
• Field of Search: 259/122, 259/124, 259/9.R, 259/9.B, 259/9.C, 182/157, 182/191, 182/158, 182/12.A, 745/21
• US Class Current: 254/122
• CPC Class Codes: B66F 7/065 Scissor linkages, i.e. X-configuration
• CPC Class Codes: B66F 7/08 hydraulically or pneumatically operated

Abstract

A centering device for a platform lift which includes a lifting mechanism for moving objects from a first to a second height. The lift mechanism has a base, at least a first and a second set of legs, and a platform. The first and second sets of legs each have first opposite ends pivotally secured to the base and the platform, respectively, and second opposite ends provide with traveling members to cooperate with the platform and base, respectively. The platform has a lower portion including a rail upon which the traveling members of the first set of legs traverse. Between the ends of each of the first set of legs, having the traveling members, and the rail, a centering device is disposed to provide alignment of the traveling members and the rails.

Claims

1. A lift comprising:

a lifting mechanism for moving objects from a first to a second height, including a base, a first set of legs, a second set of legs, a power module, and a platform;

the legs each having a proximal end and a distal end;

the proximal ends of the first set of legs each being secured to the base, and the distal ends each having a traveling member;

the proximal ends of the second set of legs each being secured to the platform, and the distal ends each having a traveling member;

the platform having a lower portion including a rail upon which each of the traveling members of the first set of legs traverse; and

a low-friction wear resistant pad disposed between each of the distal ends of the first set of legs and the corresponding rail to provide alignment of the traveling members with the rails.

2. The lift of claim 1, wherein the pad is made from Nylatron®

.

3. The lift of claim 1, wherein the pad is round.

4. The lift of claim 1, wherein the pad provides substantial parallelism between the platform and the base.

5. The lift of claim 1, wherein the power module is a hydraulic cylinder.

6. The lift of claim 1, wherein additional sets of legs are disposed between the base and the platform.

7. A centering device for a platform on a lift comprising:

a lifting mechanism including a base and a set of legs having first ends pivotally secure to the base and having traveling members associated with second ends opposite the first ends, a second set of legs, and traveling members;

the platform having a lower portion including a rail upon which each of the traveling members of the set of legs traverse; and

a low-friction wear resistant pad disposed between each of the second ends of the set of legs and the corresponding rail to provide alignment of the traveling members with the rails.

8. A lift comprising:

a lifting mechanism

for moving objects from a first to a second height including a base, a combination of legs, a platform, traveling members and a power module;

the combination of legs including at least a first pair of legs having a first travel end and a first pivot end and including at least a second pair of legs having a second travel end and a second pivot end;

the first and second travel ends being opposite one another and including a traveling member associated with each of the legs of the first and second pairs of legs at the respective travel ends thereof;

the first pivot end of the first pair of legs being pivotally attached to the base, and the second pivot end of the second pair of legs being pivotally attached to the platform;

the platform having a lower portion including rails upon which each of the traveling members of the legs of the first pair of legs traverse; and

a low-friction wear resistant pad disposed between the rails and the first travel ends of each of the legs of the first pair of legs to provide alignment of the traveling members with the rails.

9. A scissors lift comprising:

abase;

a platform;

at least a pair of legs operatively connecting the base to the platform, each pair of legs including a proximal end and a distal end,

the distal ends of one pair of legs being secured to the platform, and the distal ends of the other pair of legs moving relative to the platform;

traveling members disposed near the ends of the other pair of legs, the traveling members engaging rails connected to the platform; and

a wear-resistant insert located on at least one of the other pair of legs between the at least one leg and one of the rails.

10. The scissors lift of claim 9, wherein the traveling members are rollers that engage a bottom surface of the rails.

11. The scissors lift of claim 9, wherein at least a portion of the insert is disposed above the traveling member.

12. The scissors lift of claim 9, wherein the insert abuts the rail.

13. The scissors lift of claim 9, wherein the insert slidingly engages the rail.

14. The scissors lift of claim 9, wherein the insert protrudes outwardly from an outer portion of the at least one of the other pair of legs.

15. The scissors lift of claim 9, wherein at least a portion of the insert occupies a space between the traveling member and the rail.

16. The scissors lift of claim 9, further including additional pairs of legs disposed between the base and the platform.

17. The scissors lift of claim 9, wherein the insert is replaceable.