US3150569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston mechanism
Assignee: Milacron Inc
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Filing: 1963-03-04
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Granted: 1964-09-29
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Expires: 1983-03-04
Abstract
No abstract record available.
Inventors
- 👤 Lawrence A Attermeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:43
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/20; F15B15/26; F15B15/262
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
232 words
IN A FLUID MOTOR HAVING A PISTON ROD MOVABLE RELATIVE TO A CYLINDER, SAID ROD HAVING A LOAD FORCE ACTING THEREON CONSTANTLY TENDING TO SHIFT THE ROD IN ONE DIRECTION IN THE CYLINDER, A PISTON MECHANISM ON THE ROD COMPRISING: (A) A PAIR OF PISTON FACE MEMBERS RECEIVED AROUND THE ROD AND DIVIDING THE CYLINDER INTO TWO FLUID CAVITIES ISOLATED FROM ONE ANOTHER, ONE OF SAID FACE MEMBERS FIXED TO SAID ROD FOR AXIAL MOVEMENT THEREWITH AND THE OTHER OF SAID FACE MEMBERS MOVABLE A LIMITED AMOUNT RELATIVE TO SAID ROD, (B) A RADIALLY EXPANSIBLE MEMBER RECEIVED AROUND AND SPACED FROM THE ROD PROXIMATE TO SAID CYLINDER AND LOOSELY BETWEEN SAID FACE MEMBERS, (C) A SLEEVE FIXED ON SAID ROD BETWEEN SAID FACE MEMBERS AND AXIALLY MOVABLE WITH SAID ROD, (D) A SET OF TOGGLE MEMBERS PIVOTALLY RECEIVED BETWEEN SAID SLEEVE AND SAID EXPANSIBLE MEMBER, SAID TOGGLE MEMBERS ROTATABLY BY SAID SLEEVE TO INCREASE THE SPACING BETWEEN SAID SLEEVE AND EXPANSIBLE MEMBER WHEN THE ROD MOVES IN SAID ONE DIRECTION RELATIVE TO SAID EXPANSIBLE MEMBER, AND (E) A SPRING BIAS MECHANISM RECEIVED IN SAID ONE FACE MEMBER TENDING TO MOVE SAID EXPANSIBLE MEMBER AWAY THEREFROM IN THE OTHER DIRECTION RELATIVE TO SAID ONE DIRECTION, SAID EXPANSIBLE MEMBER THEREBY RENDERED MOVABLE WITH SAID ROD IN SAID ONE DIRECTION ONLY WHEN A FORCE ACTS ON SAID ONE FACE MEMBER TO OPPOSE THE LOAD FORCE.
Claim 2
Dependent Claim
232 words
IN A FLUID MOTOR HAVING A PISTON ROD MOVABLE RELATIVE TO A CYLINDER, SAID ROD HAVING A LOAD FORCE ACTING THEREON CONSTANTLY TENDING TO SHIFT THE ROD IN ONE DIRECTION IN THE CYLINDER, A PISTON MECHANISM ON THE ROD COMPRISING: (A) A PAIR OF PISTON FACE MEMBERS RECEIVED AROUND THE ROD AND DIVIDING THE CYLINDER INTO TWO FLUID CAVITIES ISOLATED FROM ONE ANOTHER, ONE OF SAID FACE MEMBERS FIXED TO SAID ROD FOR AXIAL MOVEMENT THEREWITH AND THE OTHER OF SAID FACE MEMBERS MOVABLE A LIMITED AMOUNT RELATIVE TO SAID ROD, (B) A RADIALLY EXPANSIBLE MEMBER RECEIVED AROUND AND SPACED FROM THE ROD PROXIMATE TO SAID CYLINDER AND LOOSELY BETWEEN SAID FACE MEMBERS, (C) A SLEEVE FIXED ON SAID ROD BETWEEN SAID FACE MEMBERS AND AXIALLY MOVABLE WITH SAID ROD, (D) A SET OF TOGGLE MEMBERS PIVOTALLY RECEIVED BETWEEN SAID SLEEVE AND SAID EXPANSIBLE MEMBER, SAID TOGGLE MEMBERS ROTATABLY BY SAID SLEEVE TO INCREASE THE SPACING BETWEEN SAID SLEEVE AND EXPANSIBLE MEMBER WHEN THE ROD MOVES IN SAID ONE DIRECTION RELATIVE TO SAID EXPANSIBLE MEMBER, AND (E) A SPRING BIAS MECHANISM RECEIVED IN SAID ONE FACE MEMBER TENDING TO MOVE SAID EXPANSIBLE MEMBER AWAY THEREFROM IN THE OTHER DIRECTION RELATIVE TO SAID ONE DIRECTION, SAID EXPANSIBLE MEMBER THEREBY RENDERED MOVABLE WITH SAID ROD IN SAID ONE DIRECTION ONLY WHEN A FORCE ACTS ON SAID ONE FACE MEMBER TO OPPOSE THE LOAD FORCE.
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) | 1967-09-29 | 1968-03-30 | 1968-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-29 | 1972-03-30 | 1972-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-29 | 1976-03-30 | 1976-09-29 | $7700.00 | Window Closed / Lapsed |