Patent US3719085A successfully refreshed from Google Patents.
US3719085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal power element
Assignee: Robertshaw Controls Co
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Filing: 1970-11-23
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Granted: 1973-03-06
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Expires: 1990-11-23
Abstract
Abstract A thermal power element is constructed of a pair of generally hollow casing members with a thermally responsive charge in one casing member and with a sealed plunger protruding from the other casing member. The two casing members are joined together to form a unitary structure by means of interengaging flange elements securely locked together to prevent relative movement between the casing members.
Inventors
- 👤 B Sliger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:18
CPC Classifications
G; G01; G01K; G01K5/00; G01K5/32; G01K5/44
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
271 words
A thermal power element comprising a generally hollow cup and a generally hollow guide disposed on a common longitudinal axis, actuating means in said guide and having a stem protruding therefrom and being movable along said longitudinal axis, a charge of thermally expansible-contractible material in said cup, diaphragm means separating interior portions of said cup and guide and defining a movable wall for transmitting movement between said charge and said actuating means, said cup having a bottom wall and a side wall extending therefrom, an annular recessed wall and an annular shoulder defining a connecting wall between said side wall and said recessed wall, said recessed wall being generally parallel to said longitudinal axis and said annular shoulder being generally transverse to said longitudinal axis, said diaphragm means having an annular periphery extending against said recessed wall in overlying relation to said annular shoulder, an annular flange on said guide being disposed in said cup, a bottom surface of said annular flange extending generally transverse to said longitudinal axis in overlying relatioN to the annular periphery of said diaphragm means, a peripheral surface on said annular flange extending generally parallel to said longitudinal axis to engage a contiguous face on said recessed wall, a radially inwardly directed end wall on said cup overlying said annular flange to retain said cup and guide in assembled relationship, locking means interconnecting the peripheral surface on said annular flange and the contiguous face on said annular recess, said locking means extending generally transverse to said longitudinal axis and preventing relative movement between said cup and guide during movement between said actuating means and said charge.
Claim 2
Dependent Claim
271 words
A thermal power element comprising a generally hollow cup and a generally hollow guide disposed on a common longitudinal axis, actuating means in said guide and having a stem protruding therefrom and being movable along said longitudinal axis, a charge of thermally expansible-contractible material in said cup, diaphragm means separating interior portions of said cup and guide and defining a movable wall for transmitting movement between said charge and said actuating means, said cup having a bottom wall and a side wall extending therefrom, an annular recessed wall and an annular shoulder defining a connecting wall between said side wall and said recessed wall, said recessed wall being generally parallel to said longitudinal axis and said annular shoulder being generally transverse to said longitudinal axis, said diaphragm means having an annular periphery extending against said recessed wall in overlying relation to said annular shoulder, an annular flange on said guide being disposed in said cup, a bottom surface of said annular flange extending generally transverse to said longitudinal axis in overlying relatioN to the annular periphery of said diaphragm means, a peripheral surface on said annular flange extending generally parallel to said longitudinal axis to engage a contiguous face on said recessed wall, a radially inwardly directed end wall on said cup overlying said annular flange to retain said cup and guide in assembled relationship, locking means interconnecting the peripheral surface on said annular flange and the contiguous face on said annular recess, said locking means extending generally transverse to said longitudinal axis and preventing relative movement between said cup and guide during movement between said actuating means and said charge.
Claim 3
Dependent Claim
271 words
A thermal power element comprising a generally hollow cup and a generally hollow guide disposed on a common longitudinal axis, actuating means in said guide and having a stem protruding therefrom and being movable along said longitudinal axis, a charge of thermally expansible-contractible material in said cup, diaphragm means separating interior portions of said cup and guide and defining a movable wall for transmitting movement between said charge and said actuating means, said cup having a bottom wall and a side wall extending therefrom, an annular recessed wall and an annular shoulder defining a connecting wall between said side wall and said recessed wall, said recessed wall being generally parallel to said longitudinal axis and said annular shoulder being generally transverse to said longitudinal axis, said diaphragm means having an annular periphery extending against said recessed wall in overlying relation to said annular shoulder, an annular flange on said guide being disposed in said cup, a bottom surface of said annular flange extending generally transverse to said longitudinal axis in overlying relatioN to the annular periphery of said diaphragm means, a peripheral surface on said annular flange extending generally parallel to said longitudinal axis to engage a contiguous face on said recessed wall, a radially inwardly directed end wall on said cup overlying said annular flange to retain said cup and guide in assembled relationship, locking means interconnecting the peripheral surface on said annular flange and the contiguous face on said annular recess, said locking means extending generally transverse to said longitudinal axis and preventing relative movement between said cup and guide during movement between said actuating means and said charge.
Claim 4
Dependent Claim
271 words
A thermal power element comprising a generally hollow cup and a generally hollow guide disposed on a common longitudinal axis, actuating means in said guide and having a stem protruding therefrom and being movable along said longitudinal axis, a charge of thermally expansible-contractible material in said cup, diaphragm means separating interior portions of said cup and guide and defining a movable wall for transmitting movement between said charge and said actuating means, said cup having a bottom wall and a side wall extending therefrom, an annular recessed wall and an annular shoulder defining a connecting wall between said side wall and said recessed wall, said recessed wall being generally parallel to said longitudinal axis and said annular shoulder being generally transverse to said longitudinal axis, said diaphragm means having an annular periphery extending against said recessed wall in overlying relation to said annular shoulder, an annular flange on said guide being disposed in said cup, a bottom surface of said annular flange extending generally transverse to said longitudinal axis in overlying relatioN to the annular periphery of said diaphragm means, a peripheral surface on said annular flange extending generally parallel to said longitudinal axis to engage a contiguous face on said recessed wall, a radially inwardly directed end wall on said cup overlying said annular flange to retain said cup and guide in assembled relationship, locking means interconnecting the peripheral surface on said annular flange and the contiguous face on said annular recess, said locking means extending generally transverse to said longitudinal axis and preventing relative movement between said cup and guide during movement between said actuating means and said charge.
Claim 5
Dependent Claim
29 words
The invention as recited in claim 1 wherein said locking means includes a groove in said peripheral surface and a projection extending from said contiguous face into said groove.
Claim 6
Dependent Claim
18 words
The invention as recited in claim 2 wherein said groove and said projection have similarly shaped cross sections.
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) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |