Patent US3987870A successfully refreshed from Google Patents.
US3987870A
Expired / Lapsed
US
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Mast assembly
Assignee: Caterpillar Industrial Inc
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Filing: 1975-11-03
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Granted: 1976-10-26
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Expires: 1995-11-03
Abstract
Abstract A mast assembly has pulley means associated with sheaves of a lift chain for maintaining a hydraulic hose of the mast assembly at a protected position adjacent the chain.
Inventors
- 👤 Elias Wojtyna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:25
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/20; B66F9/205; Y; Y10; Y10S; Y10S414/00; Y10S414/131
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
159 words
In a mast assembly having a mast, a piston cylinder elevating mechanism associated with said mast, a carriage connected to said piston cylinder elevating mechanism, a first sheave positioned at a first elevation, a second sheave positioned at a higher second elevation, a chain connected at one end to the carriage and extending under the first sheave and over the second sheave, a fluid actuated device carried by the cariage, and at least one resilient hose operably connected to the fluid actuated device, the improvement comprising: a pulley connected to the second sheave and being positioned at a location immediately adjacent and beneath said second sheave; and said hose extending under the first sheave, over the pulley, and to the fluid actuated device, said hose being in contact with and overlying the chain on the first sheave with portions of said hose extending to and from said pulley being maintained by said pulley substantially adjacent and beneath said chain.
Claim 2
Dependent Claim
159 words
In a mast assembly having a mast, a piston cylinder elevating mechanism associated with said mast, a carriage connected to said piston cylinder elevating mechanism, a first sheave positioned at a first elevation, a second sheave positioned at a higher second elevation, a chain connected at one end to the carriage and extending under the first sheave and over the second sheave, a fluid actuated device carried by the cariage, and at least one resilient hose operably connected to the fluid actuated device, the improvement comprising: a pulley connected to the second sheave and being positioned at a location immediately adjacent and beneath said second sheave; and said hose extending under the first sheave, over the pulley, and to the fluid actuated device, said hose being in contact with and overlying the chain on the first sheave with portions of said hose extending to and from said pulley being maintained by said pulley substantially adjacent and beneath said chain.
Claim 3
Dependent Claim
23 words
Apparatus, as set forth in claim 1, wherein the axis of the second sheave and the pulley are oriented in a common direction.
Claim 4
Dependent Claim
30 words
Apparatus, as set forth in claim 1, wherein the axis of the second sheave and the pulley are maintained in a plane substantially parallel to the plane of the mast.
Claim 5
Dependent Claim
32 words
Apparatus, as set forth in claim 1, wherein the diameter of the pulley is of a size sufficient to maintain portions of the hose positioned adjacent the chain spaced from said chain.
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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) | 1979-10-26 | 1980-04-26 | 1980-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-26 | 1984-04-26 | 1984-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-26 | 1988-04-26 | 1988-10-26 | $7700.00 | Window Closed / Lapsed |