US3772966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid torque operator
Assignee: Individual
•
Filing: 1972-06-28
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Granted: 1973-11-20
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Expires: 1992-06-28
Abstract
Abstract A fluid power operator for generating a rotary output torque. A pair of fixed, linear piston rods is located in a parallel spaced disposition to extend between and through a pair of housing end walls. Two fixed pistons are individually fixed to a midportion of a different rod. A cylinder envelopes each piston rod for guided movement along the piston rod. Mechanical coupling means, which may be a Scotch yoke, rack and pinion gear, or a slotted plate cooperating with disc or lever supported pins, interconnect both cylinders to an output drive shaft extending through the housing cover and bottom. Fluid passageways formed in each piston rod supply fluid pressure and exhaust to the cylinder chambers. Accordingly, the application of varying differential pressures to the opposite sides of both pistons reciprocate both cylinders relative their associated rods to apply a rotating force to the drive shaft through the coupling means.
Inventors
- 👤 C Mills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:07
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/02; F15B15/06; F15B15/065; F01; F01B; F01B17/00; F01B17/02; F01B9/00; F01B9/04; F01B9/047; F03; F03C; F03C1/00; F03C1/02; F15B15/066; F16; F16H; F16H19/00; F16H19/02; F16H19/04; F16H21/00; F16H21/10; F16H21/44
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
260 words
A fluid power operator for generating a rotary output torque and contained within a housing having a plurality of spaced walls comprising a piston, a linear piston rod fixed to a pair of said spaced walls and extending through the piston and having individual fluid passageways having openings outside of the housing and communicating with the opposite sides of the piston, the piston being fixed to an intermediate portion of the rod, a cylinder including end caps enveloping the piston for guided movement along and only by the piston and piston rod, a pair of output drive elements secured to a drive shaft means, said drive shaft means being rotatably mounted to a second pair of spaced walls and rotating on an axis fixed relative to the housing and perpendicular to the longitudinal axis of the piston rod at a point generally intermediate thereof, a pair of parallel spaced cylinder connector elements means fixing the ends of each of said connector elements to said end caps of the cylinder with the cylinder located therebetween and with the connector elements being located in planes perpendicular to the axis of rotation of the output drive shaft means, and a pair of spaced coupling elements coupled to each of the connector elements, respectively, each coupling element individually coupling a different connector element to the drive elements whereby a varying differential fluid pressure applied to opposite sides of the piston moves or reciprocates the cylinder relative the piston to apply spaced rotating forces to the drive elements through the spaced connector and coupling elements.
Claim 2
Dependent Claim
260 words
A fluid power operator for generating a rotary output torque and contained within a housing having a plurality of spaced walls comprising a piston, a linear piston rod fixed to a pair of said spaced walls and extending through the piston and having individual fluid passageways having openings outside of the housing and communicating with the opposite sides of the piston, the piston being fixed to an intermediate portion of the rod, a cylinder including end caps enveloping the piston for guided movement along and only by the piston and piston rod, a pair of output drive elements secured to a drive shaft means, said drive shaft means being rotatably mounted to a second pair of spaced walls and rotating on an axis fixed relative to the housing and perpendicular to the longitudinal axis of the piston rod at a point generally intermediate thereof, a pair of parallel spaced cylinder connector elements means fixing the ends of each of said connector elements to said end caps of the cylinder with the cylinder located therebetween and with the connector elements being located in planes perpendicular to the axis of rotation of the output drive shaft means, and a pair of spaced coupling elements coupled to each of the connector elements, respectively, each coupling element individually coupling a different connector element to the drive elements whereby a varying differential fluid pressure applied to opposite sides of the piston moves or reciprocates the cylinder relative the piston to apply spaced rotating forces to the drive elements through the spaced connector and coupling elements.
Claim 3
Dependent Claim
229 words
The combination of claim 1 in which all of the following operator components are also contained within the housing comprising a second piston, and a second linear piston rod fixed to said first pair of spaced walls and extending through the second piston and also having individual fluid pasSageways having openings outside of the housing and communicating with opposite sides of the second piston, the second piston being fixed to an intermediate portion of the second rod, a second cylinder including end caps enveloping the second piston for guided movement along and only by the second piston and second piston rod, and a second pair of spaced cylinder connector elements means fixing the ends of said connector elements to said end caps of the second cylinder with the second cylinder located therebetween and with the connector elements being located in planes perpendicular to the axis of rotation of the output drive shaft means and a second pair of spaced coupling elements each individually coupling a different connector element of said second pair to the drive shaft means with the drive elements being located between both cylinders whereby the application of varying differential fluid pressures to the opposite sides of both pistons moves or reciprocates both cylinders relative their associated rods to apply balanced spaced rotating forces to the drive elements through both pair of spaced connector and coupling elements.
Claim 4
Dependent Claim
52 words
The combination of claim 2 in which the housing includes a box and a removable cover wall and a bottom wall coupled to the box of which the end walls are a part and in which the drive shaft means is a shaft extending between and projecting through the bottom and cover.
Claim 5
Dependent Claim
47 words
The combination of claim 2 in which the drive elements are Scotch yokes and in which the coupling elements are pin elements connected to each connector element, and in which the drive shaft means is a shaft to which a midportion of each Scotch yoke is pivoted.
Claim 6
Dependent Claim
50 words
The combination of claim 2 in which the coupling elements are rack teeth and in which the drive elements are mating pinion gears, and in which two racks are connected to each cylinder, and their mating pinion gears are rotatably supported on the drive shaft means which is a shaft.
Claim 7
Dependent Claim
63 words
The combination of claim 2 in which the connector elements are plates, the coupling elements are slots in said plates, and the drive elements are pivoted pin linkages wherein two slotted plates are connected to each cylinder and the pin linkages are rotatably supported on the drive shaft means which is a shaft so that a linkage pin is engaged in each slot.
Claim 8
Dependent Claim
86 words
The combination of claim 2 in which the connector elements are plates, the coupling elements are multiple slots in said plates, and the drive elements are pivoted discs carrying multiple slot engaging pin elements wherein two slotted plates are connected to each cylinder, and the pivoted discs are rotatably supported on the drive shaft means which is a shaft so that a plurality of pin elements sequentially engage each of the plurality of slots formed in each plate connected to each cylinder during a cylinder stroke.
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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) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |