Patent US4545462A successfully refreshed from Google Patents.
US4545462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lift for vehicle maintenance
Assignee: Individual
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Filing: 1983-06-22
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Granted: 1985-10-08
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Expires: 2003-06-22
Abstract
Abstract A hydraulic vehicle lift comprising a pair of hydraulic cylinders with outwardly projecting lifting arms for engaging a vehicle to be lifted. The lifting arms are secured to a housing which includes wheels in rolling contact with the outer surface of the hydraulic cylinders. A cable system extending between the hydraulic cylinders and lifting arms is provided to balance the ascent and descent of the lifting arms on the two cylinders.
Inventors
- 👤 Yun T. Sul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:55
CPC Classifications
B; B66; B66F; B66F7/00; B66F7/02; B66F7/04; B66F7/10; B66F7/16; B66F7/20
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
195 words
A lifting device comprising: two hydraulic cylinders each including a piston means reciprocally movable therein; each of said piston means having respective lifting arm means operatively associated therewith for engaging an object to be lifted; cable means extending and operatively associated with said respective lifting arm means for balancing the movement of said piston means; a lifting arm support means associated with each of said lifting arm means and operatively associated with said piston means; a guide arm means extending downwardly from said respective lifting arm support means and having wheel means associated therewith, said wheel means being in rolling contact with a guide means; and pulley means positioned adjacent to said cylinder and between said lifting arm support means and said wheel means; said cable means being secured to said lifting arm support means associated with a first one of said cylinders, extends over one of said pulley means positioned adjacent to said first one of said cylinders, extends to and over a pulley means positioned adjacent to a second one of said cylinders, and extends to and is secured to said lifting arm support means associated with the second one of said cylinders.
Claim 2
Dependent Claim
195 words
A lifting device comprising: two hydraulic cylinders each including a piston means reciprocally movable therein; each of said piston means having respective lifting arm means operatively associated therewith for engaging an object to be lifted; cable means extending and operatively associated with said respective lifting arm means for balancing the movement of said piston means; a lifting arm support means associated with each of said lifting arm means and operatively associated with said piston means; a guide arm means extending downwardly from said respective lifting arm support means and having wheel means associated therewith, said wheel means being in rolling contact with a guide means; and pulley means positioned adjacent to said cylinder and between said lifting arm support means and said wheel means; said cable means being secured to said lifting arm support means associated with a first one of said cylinders, extends over one of said pulley means positioned adjacent to said first one of said cylinders, extends to and over a pulley means positioned adjacent to a second one of said cylinders, and extends to and is secured to said lifting arm support means associated with the second one of said cylinders.
Claim 3
Dependent Claim
27 words
A lifting device as in claim 1, wherein said guide arm means includes a housing at the lower end thereof, said wheel means positioned within said housing.
Claim 4
Dependent Claim
24 words
A lifting device as in claim 2, wherein said guide means comprises two parallel vertically extending guides for rolling contact of said wheel means.
Claim 5
Dependent Claim
25 words
A lifting device as in claim 3, wherein said wheel means comprises two wheels, each in rolling contact with one of said two parallel guides.
Claim 6
Dependent Claim
21 words
A lifting device as in claim 1, wherein said lifting arm means are pivotally associated with said lifting arm support means.
Claim 7
Dependent Claim
22 words
A lifting device as in claim 1, wherein said lifting arm means are operatively secured to the top of said piston means.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-10-07 | 1989-04-08 | 1989-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-07 | 1993-04-08 | 1993-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-07 | 1997-04-08 | 1997-10-08 | $7700.00 | Window Closed / Lapsed |