US3762280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston motor device
Assignee: Robertshaw Controls Co
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Filing: 1972-02-16
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Granted: 1973-10-02
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Expires: 1992-02-16
Abstract
Abstract A piston motor device having a piston rod actuating mechanism mounted in a two-piece housing assembled with a snap fit and having a linkage assembly connected to the outer end of the piston rod for moving a shaft member clockwise and counterclockwise about its axis in response to linear movement of the piston rod.
Inventors
- 👤 K Kreuter
- 👤 L Steger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:52
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/08; F15B15/10; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20582; Y10T74/206
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
340 words
A piston motor device including a casing, means for rigidly mounting said casing, a piston rod having an inner end in said casing and an outer end slidably extending out of said casing, an operating mechanism in said casing connected to said inner end for reciprocating said piston rod, an actuator shaft adapted for limited clockwise and counterclockwise rotation about its axis in an oscillatory manner, a linkage assembly including a crankarm and a link disposed in angular relation to each other, said opErating mechanism including a spring biased piston, a flexible diaphragm having a peripheral mounting portion carried by said casing and a central portion engaging said piston and a rotatable connection between the inner end of said piston rod and said piston permitting the linkage assembly and said piston rod to be rotated as a unit to any desired position for suitable attachment to said actuator shaft, said crankarm having one end directly fixed to said actuator shaft for movement thereof, said link having one end pivotally connected to the outer end of said piston rod for movement thereby, said link being supported only by the ends thereof, and a pivotal connection between the other end of said link and a point located along the length of said crankarm whereby reciprocation of said piston rod causes oscillation of said actuator element, said crankarm and said link being disposed at an obtuse angle to each other when said piston rod is at one end of its stroke and said angle being reduced in degrees when said piston rod is moved to the other end of its stroke, said pivotal connection including adjustment means connecting said other end of said link to a selected position along said crankarm whereby said obtuse angle therebetween may be preset to correspond to a selected oscillation limit of said actuator shaft, and said adjustment means including an elongated slot in said crankarm, a bushing in said other end of said link, and locking means locking said bushing in a selected position of said slot.
Claim 2
Dependent Claim
340 words
A piston motor device including a casing, means for rigidly mounting said casing, a piston rod having an inner end in said casing and an outer end slidably extending out of said casing, an operating mechanism in said casing connected to said inner end for reciprocating said piston rod, an actuator shaft adapted for limited clockwise and counterclockwise rotation about its axis in an oscillatory manner, a linkage assembly including a crankarm and a link disposed in angular relation to each other, said opErating mechanism including a spring biased piston, a flexible diaphragm having a peripheral mounting portion carried by said casing and a central portion engaging said piston and a rotatable connection between the inner end of said piston rod and said piston permitting the linkage assembly and said piston rod to be rotated as a unit to any desired position for suitable attachment to said actuator shaft, said crankarm having one end directly fixed to said actuator shaft for movement thereof, said link having one end pivotally connected to the outer end of said piston rod for movement thereby, said link being supported only by the ends thereof, and a pivotal connection between the other end of said link and a point located along the length of said crankarm whereby reciprocation of said piston rod causes oscillation of said actuator element, said crankarm and said link being disposed at an obtuse angle to each other when said piston rod is at one end of its stroke and said angle being reduced in degrees when said piston rod is moved to the other end of its stroke, said pivotal connection including adjustment means connecting said other end of said link to a selected position along said crankarm whereby said obtuse angle therebetween may be preset to correspond to a selected oscillation limit of said actuator shaft, and said adjustment means including an elongated slot in said crankarm, a bushing in said other end of said link, and locking means locking said bushing in a selected position of said slot.
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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |