Pneumatic lifting device
First Claim
1. A pneumatic lifting device comprising:
- a base;
a first mast attached to the base, the first mast having a first rail extending therealong;
a second mast attached to the base opposite the first mast, the second mast having a second rail extending therealong; and
a lift platform movably coupled to the first rail by a pair of bearings interposed between and separating the first rail and the lift platform, the pair of bearings coupling the lift platform to the first rail being mounted on the lift platform so as to move in conjunction with the lift platform,wherein the lift platform is also movably coupled to the second rail by a pair of bearings interposed between and separating the second rail and the lift platform, the pair of bearings coupling the lift platform to the second rail being mounted on the lift platform so as to move in conjunction with the lift platform,the pair of bearings coupling the lift platform to the first rail being operatively coupled to the first rail so as to enable the pair of bearings coupling the lift platform to the first rail to move with respect to the first rail,the pair of bearings coupling the lift platform to the second rail being operatively coupled to the second rail so as to enable the pair of bearings coupling the lift platform to the second rail to move with respect to the second rail,wherein a bearing of the pair of bearings coupling the lift platform to the first rail that is located farthest from the base is coupled to the lift platform so that, when the bearing is engaged with the first rail, at least a portion of a load-bearing part of the bearing resides above a plane defined by a portion of the lift platform and extending through the bearing, and wherein the other bearing of the pair of bearings coupling the lift platform to the first rail resides below the plane.
2 Assignments
0 Petitions
Accused Products
Abstract
A pneumatic lifting device includes a base, a first mast attached to the base, and a second mast attached to the base opposite the first mast. The first mast has a first rail extending therealong, and the second mast has a second rail extending therealong. A lift platform is operatively coupled to the base. The platform includes a first pair and a second pair of bearings coupled thereto so as to move in conjunction with the lift platform. The first pair of bearings is operatively coupled to the first rail so as to enable the first pair of bearings to move with respect to the first rail. The second pair of bearings is operatively coupled to the second rail so as to enable the second pair of bearings to move with respect to the second rail.
29 Citations
12 Claims
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1. A pneumatic lifting device comprising:
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a base; a first mast attached to the base, the first mast having a first rail extending therealong; a second mast attached to the base opposite the first mast, the second mast having a second rail extending therealong; and a lift platform movably coupled to the first rail by a pair of bearings interposed between and separating the first rail and the lift platform, the pair of bearings coupling the lift platform to the first rail being mounted on the lift platform so as to move in conjunction with the lift platform, wherein the lift platform is also movably coupled to the second rail by a pair of bearings interposed between and separating the second rail and the lift platform, the pair of bearings coupling the lift platform to the second rail being mounted on the lift platform so as to move in conjunction with the lift platform, the pair of bearings coupling the lift platform to the first rail being operatively coupled to the first rail so as to enable the pair of bearings coupling the lift platform to the first rail to move with respect to the first rail, the pair of bearings coupling the lift platform to the second rail being operatively coupled to the second rail so as to enable the pair of bearings coupling the lift platform to the second rail to move with respect to the second rail, wherein a bearing of the pair of bearings coupling the lift platform to the first rail that is located farthest from the base is coupled to the lift platform so that, when the bearing is engaged with the first rail, at least a portion of a load-bearing part of the bearing resides above a plane defined by a portion of the lift platform and extending through the bearing, and wherein the other bearing of the pair of bearings coupling the lift platform to the first rail resides below the plane. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A pneumatic lifting device comprising:
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a base; a first mast attached to the base, the first mast having a first rail extending therealong; a second mast attached to the base opposite the first mast, the second mast having a second rail extending therealong; a first pair of bearings engaged with the first rail so to as be freely movable along the first rail; a third rail spaced apart from the first rail by the first pair of bearings and attached to the first pair of bearings so as to move in conjunction with the first pair of bearings; a second pair of bearings engaged with the second rail so to as be freely movable along the second rail; a fourth rail spaced apart from the second rail by the second pair of bearings and attached to the second pair of bearings so as to move in conjunction with the second pair of bearings; a third pair of bearings engaged with the third rail so to as be freely movable along the third rail; a fourth pair of bearings engaged with the fourth rail so to as be freely movable along the fourth rail; and a lift platform coupled to the third and fourth pairs of bearings so as to move in conjunction with the third and fourth pairs of bearings, wherein a bearing of the third pair of bearings that is located farthest from the base is coupled to the lift platform so that, when the bearing of the third pair of bearings is engaged with the third rail, at least a portion of a load-bearing part of the bearing of the third pair of bearings resides above a plane defined by a portion of the lift platform and extending through the bearing, and wherein the other bearing of the third pair of bearings resides below the plane. - View Dependent Claims (9, 10, 11, 12)
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Specification