US3765497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic compression load cell
Assignee: RAINIER NATIONAL BANK
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Filing: 1972-09-05
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Granted: 1973-10-16
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Expires: 1992-09-05
Abstract
Abstract A hydraulic compression load cell which includes interchangeable internal parts of different sizes to impart differing mechanical advantages adapting the cell to different load ranges, together with a mechanical amplifier which is adjustable to further expand and contract the load capacity of the cell.
Inventors
- 👤 P Thordarson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:25
CPC Classifications
G; G01; G01L; G01L1/00; G01L1/02; G01G; G01G5/00; G01G5/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
162 words
A hydraulic compression load cell comprising: a. a housing defining an internal cavity having a top opening and an outlet for transmitting fluid pressure; b. a plurality of inserts adapted externally to be threaded interchangeably into the housing cavity and each having a vertical central opening therein, said inserts having internal bottom-opening cavities of respectively different sizes corresponding to different load ranges; c. a plurality of piston elements corresponding to said inserts and having head portions of different sizes to be received in the cavities of the respective inserts, each having a rod portion connected to the head portion to extend vertically through the central opening in the insert for engagement by an applied load; d. a plurality of diaphragms of different sizes adapted interchangeably to be held in the housing cavity by respective inserts and engaged by the head portions of corresponding piston elements, each diaphragm defining a fluid confining space within the housing cavity communicating with the fluid pressure outlet.
Claim 2
Dependent Claim
162 words
A hydraulic compression load cell comprising: a. a housing defining an internal cavity having a top opening and an outlet for transmitting fluid pressure; b. a plurality of inserts adapted externally to be threaded interchangeably into the housing cavity and each having a vertical central opening therein, said inserts having internal bottom-opening cavities of respectively different sizes corresponding to different load ranges; c. a plurality of piston elements corresponding to said inserts and having head portions of different sizes to be received in the cavities of the respective inserts, each having a rod portion connected to the head portion to extend vertically through the central opening in the insert for engagement by an applied load; d. a plurality of diaphragms of different sizes adapted interchangeably to be held in the housing cavity by respective inserts and engaged by the head portions of corresponding piston elements, each diaphragm defining a fluid confining space within the housing cavity communicating with the fluid pressure outlet.
Claim 3
Dependent Claim
28 words
The load cell of claim 1 wherein the piston element includes a load bearing table portion having an annular well extending downwardly overlapping the outside of said housing.
Claim 4
Dependent Claim
75 words
The load cell of claim 1 in combination with a mechanical amplifier comprising a base portion on which said housing is mounted and which includes an upwardly extending mounting arm, and a beam pivotally coupled to the mounting arm at one end and extending over the load cell to engage the piston element thereof, said beam including a load engaging element mounted on the top surface thereof and positionable along said beam at selected location.
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |