Patent US3854832A successfully refreshed from Google Patents.
US3854832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Handling rod assembly for investment casting mold
Assignee: Caterpillar Inc
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Filing: 1973-01-15
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Granted: 1974-12-17
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Expires: 1993-01-15
Abstract
Abstract A handling rod assembly comprises a rod having a connecting lug detachably mounted at its lower end to provide a drive connection between the rod assembly and a wax pattern pre-attached to the lug. The lug is detachably connected to the rod assembly by a bayonet connection and a pair of drive lugs which cooperate to prevent axial and rotational movement of the lug relative to the rod during spinning thereof. A coil spring is mounted on the rod to retain the drive lugs in driving engagement during such spinning.
Inventors
- 👤 G Cowper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:31
CPC Classifications
B; B22; B22C; B22C7/00; B22C7/02; A; A63; A63B; A63B60/00; A63B60/06; A63B60/22; A63B60/28; Y; Y10; Y10T; Y10T403/00; Y10T403/70; Y10T403/7005; Y10T403/7007; Y10T403/7016
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
87 words
An investment casting handling rod assembly adapted for use in making an investment casting mold comprising a rod having attachment means on its upper end adapted to attach the rod assembly to mold handling apparatus, a casting connecting lug having an irregularly shaped head, coupling means detachably connecting said lug to a lower end of said rod assembly and for preventing axial movement of said lug relative to said rod, and anti-rotation means for preventing both clockwise and counterclockwise rotation of said lug relative to said rod.
Claim 2
Dependent Claim
87 words
An investment casting handling rod assembly adapted for use in making an investment casting mold comprising a rod having attachment means on its upper end adapted to attach the rod assembly to mold handling apparatus, a casting connecting lug having an irregularly shaped head, coupling means detachably connecting said lug to a lower end of said rod assembly and for preventing axial movement of said lug relative to said rod, and anti-rotation means for preventing both clockwise and counterclockwise rotation of said lug relative to said rod.
Claim 3
Dependent Claim
22 words
The handling rod assembly of claim 1 further comprising releasable retaining means for continuously maintaining said anti-rotation means in a locked position.
Claim 4
Dependent Claim
39 words
The handling rod assembly of claim 1 further comprising a sleeve telescopically mounted on said rod, said anti-rotation means comprising at least one mating tab and slot connection formed on axially opposed ends of said lug and said sleeve.
Claim 5
Dependent Claim
32 words
The handling rod assembly of claim 3 further comprising an annular flange secured on said rod and a normally compressed coil spring mounted on said rod between said sleeve and said flange.
Claim 6
Dependent Claim
34 words
The handling rod assembly of claim 3 wherein said anti-rotation means further comprises a pin secured to said rod to have an end thereof project radially through at least one side of said sleeve.
Claim 7
Dependent Claim
45 words
The handling rod assembly of claim 5 further comprising an elongated slot formed longitudinally through said sleeve to receive the end of said pin therein to form a lost-motion connection permitting limited axial movement, but for preventing relative rotation between said rod and said sleeve.
Claim 8
Dependent Claim
15 words
The handling rod assembly of claim 1 wherein said coupling means comprises a bayonet connection.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |