Patent US3850409A successfully refreshed from Google Patents.
US3850409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual hydraulic jack and holding device
Assignee: PC GORMAN
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Filing: 1973-03-23
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Granted: 1974-11-26
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Expires: 1993-03-23
Abstract
Abstract A dual jacking device for automobiles and the like having a ground supported base for holding a pair of vertically upstanding pistons. A lifting cylinder surrounds each piston and is connected to a pump for pumping hydraulic fluid into the cylinder. Each cylinder has a lifting bracket movably mounted on the cylinder and a slidable holding chain mounted on the bracket. Each cylinder also has a lifting chain, one end of which is movably mounted on the cylinder, and the other end has secured to it a hook.
Inventors
- 👤 N Jones
- 👤 O Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:46
CPC Classifications
B; B66; B66F; B66F3/00; B66F3/24; B66F3/25; B66F3/42; B66F13/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
124 words
A dual jacking device comprising: a. a base having spaced-apart floor plates, said floor plates being movable relative to each other and securable against further movement at any desired position, said floor plates further having vertically extending tubular elements secured thereto, b. two vertically upstanding jacking means mounted on said base in spaced-apart relationship, each of said jacking means further comprising a hydraulic pump, a lifting column secured to said pump, and a piston positioned in said column and movable relative to said column upon actuation of said pump, said tubular elements being capable of receiving one end of said piston, and c. first and second lifting means secured to each of said jacking means for supporting an object relative to said jacking means.
Claim 2
Dependent Claim
124 words
A dual jacking device comprising: a. a base having spaced-apart floor plates, said floor plates being movable relative to each other and securable against further movement at any desired position, said floor plates further having vertically extending tubular elements secured thereto, b. two vertically upstanding jacking means mounted on said base in spaced-apart relationship, each of said jacking means further comprising a hydraulic pump, a lifting column secured to said pump, and a piston positioned in said column and movable relative to said column upon actuation of said pump, said tubular elements being capable of receiving one end of said piston, and c. first and second lifting means secured to each of said jacking means for supporting an object relative to said jacking means.
Claim 3
Dependent Claim
46 words
A jacking device as set forth in claim 1 wherein one end of each of said pistons has a metal block secured thereto, said metal block being insertable into said tubular element for supporting said each of said jacking means in vertical alignment with each other.
Claim 4
Dependent Claim
186 words
A dual jacking device comprising: a. spaced-apart base members, said base members being interconnected by tubular members in telescoping relationship to each other, said tubular members serving to maintain said base members in spaced-apart relationship, b. vertically upstanding jacking means mounted on each of said base members, each of said jacking means having a hydraulic pump, a lifting column secured to said pump and a piston positioned in said column movable relative to said column upon actuation of said pump, c. a bracket movably mounted on said cylinder having both screw means for securing said bracket to said lifting column in any desired position, said bracket further having guard box means with chain means movable relative to said guard box for holding in position an object supported by said bracket, and d. clamp means movably mounted on said cylinder having both screw means for securing said clamp to said lifting column in any desired position and chain means secured at one end to said clamp, the other end of said chain means having a hook secured thereto for supporting an object relative to said lifting column.
Claim 5
Dependent Claim
186 words
A dual jacking device comprising: a. spaced-apart base members, said base members being interconnected by tubular members in telescoping relationship to each other, said tubular members serving to maintain said base members in spaced-apart relationship, b. vertically upstanding jacking means mounted on each of said base members, each of said jacking means having a hydraulic pump, a lifting column secured to said pump and a piston positioned in said column movable relative to said column upon actuation of said pump, c. a bracket movably mounted on said cylinder having both screw means for securing said bracket to said lifting column in any desired position, said bracket further having guard box means with chain means movable relative to said guard box for holding in position an object supported by said bracket, and d. clamp means movably mounted on said cylinder having both screw means for securing said clamp to said lifting column in any desired position and chain means secured at one end to said clamp, the other end of said chain means having a hook secured thereto for supporting an object relative to said lifting column.
References Cited (Backward Citations)
US832420A
Cited
US1064538A
Cited
DE678669C
Cited
US2369545A
Cited
US2527841A
Cited
US2565072A
Cited
US3095182A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |