US3739693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic positioning apparatus and parts therefor or the like
Assignee: Robertshaw Controls Co
•
Filing: 1971-10-22
•
Granted: 1973-06-19
•
Expires: 1991-10-22
Abstract
Abstract A plurality of separate pneumatically operated actuators disposed in aligned and abutting relation to provide a linear positioning unit having opposed ends with each actuator being individually operable to linearly extend itself when actuated and thereafter to linearly collapse itself when deactuated whereby one end of the unit will be correspondingly linearly extended relative to the other end thereof and thereafter be linearly collapsed relative to the other end thereof. A control device being operatively interconnected to the one end of the positioning unit to be controlled in relation to the position of the one end relative to the other end thereof and control means for directing a source of pneumatic fluid to at least one of the actuators to extend the one end of the unit by the degree of actuation of the one actuator and for thereafter disconnecting the source from that one actuator to collapse the one end of the unit by the degree of deactuation of the one actuator.
Inventors
- 👤 L Puster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:49
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/16; F15B11/18; F15B11/08; F15B11/12; F15B11/121; F15B11/125
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
243 words
A pneumatically operated actuator comprising a pair of cupshaped housing members respectively having their open ends provided with threaded portions that are adjustable secured together in threaded telescoping relation to define a cavity between their respective closed ends, and a piston member slidably disposed in the open end of one of said housing members to define a chamber between said piston member and said closed end of said one housing member, the other housing member having an opening through its said closed end in communication with said cavity, said piston member having an extension projecting through said opening whereby the stroke of said actuator is determined by said piston member abutting against the respective closed ends of said housing members, said threaded portion of said one housing member being inwardly offset from said closed end thereof, holding means being carried by said one housing member to secure said housing members together in the desired adjusted telescoping relation thereof, said holding means comprising a set screw threaded in a threaded through bore in said one housing member and having a portion thereof extending beyond said end wall of said one housing member outboard of said inside side surface thereof and abut against the open end of said other housing member, said set screw being adapted to be adjusted to permit said free end of said other housing member to be adjusted to abut against said one housing member adjacent said offset threaded portion thereof.
Claim 2
Dependent Claim
243 words
A pneumatically operated actuator comprising a pair of cupshaped housing members respectively having their open ends provided with threaded portions that are adjustable secured together in threaded telescoping relation to define a cavity between their respective closed ends, and a piston member slidably disposed in the open end of one of said housing members to define a chamber between said piston member and said closed end of said one housing member, the other housing member having an opening through its said closed end in communication with said cavity, said piston member having an extension projecting through said opening whereby the stroke of said actuator is determined by said piston member abutting against the respective closed ends of said housing members, said threaded portion of said one housing member being inwardly offset from said closed end thereof, holding means being carried by said one housing member to secure said housing members together in the desired adjusted telescoping relation thereof, said holding means comprising a set screw threaded in a threaded through bore in said one housing member and having a portion thereof extending beyond said end wall of said one housing member outboard of said inside side surface thereof and abut against the open end of said other housing member, said set screw being adapted to be adjusted to permit said free end of said other housing member to be adjusted to abut against said one housing member adjacent said offset threaded portion thereof.
Claim 3
Dependent Claim
63 words
A pneumatically operated actuator as set forth in claim 1 wherein said holding means comprises another set screw that is threaded in another threaded through bore in said one housing member and has a portion thereof extending beyond said end wall of said one housing member outboard of said inside surface thereof and abut against said open end of said other housing member.
Claim 4
Dependent Claim
22 words
A pneumatically operated actuator as set forth in claim 2 wherein said set screws are disposed on opposite sides of said chamber.
Claim 5
Dependent Claim
21 words
A pneumatically operated actuator As set forth in claim 1 wherein each housing member has a substantially circular transverse cross-sectional configuration.
Claim 6
Dependent Claim
37 words
A pneumatically operated actuator as set forth in claim 1 wherein said piston member has an end surface for abutting against said closed end of said one housing member, said end surface having a recess formed therein.
Claim 7
Dependent Claim
24 words
A pneumatically operated actuator as set forth in claim 5 wherein said end surface of said piston member is beveled at the edge thereof.
Claim 8
Dependent Claim
28 words
A pneumatically operated actuator as set forth in claim 1 wherein said piston member carries an O-ring to seal against said one housing member while providing movement therebetween.
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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |