US3677573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic equipment cart
Assignee: Individual
•
Filing: 1970-09-25
•
Granted: 1972-07-18
•
Expires: 1990-09-25
Abstract
Abstract A cart having two sets of wheels which are interchangeable, one set for another, so that the cart can readily be converted from outdoor use to indoor use and vice versa. The cart is capable of transporting equipment such as that used by a photographer and also providing a steady base for the camera mount. Parts of the cart are foldable and others collapsible for convenience in storing the cart in a confined space.
Inventors
- 👤 Sonny B Chin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:22
CPC Classifications
F; F16; F16M; F16M11/00; F16M11/42; B; B62; B62B; B62B1/00; B62B1/10; B62B1/12; F16M11/02; F16M11/04; F16M11/06; F16M11/10; F16M11/18; F16M11/20; F16M11/24; G; G03; G03B; G03B17/00; G03B17/56; G03B17/561; F16M2200/00; F16M2200/08
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
167 words
A cart for transporting photographic equipment or the like comprising a frame having a platform and side members, an axle rotatably mounted in the frame near the platform and having opposite ends projecting laterally of the side members, an arm secured to each opposite end of the axle for swinging movement in a vertical plane, a first and second pair of spindles mounted on opposite ends of the arms, a pair of main wheels journalled on the first pair of spindles, a pair of auxiliary wheels journalled on the second pair of spindles, manually operable change means for rotating the axle whereby to selectively swing the main wheels or the auxiliary wheels into cart supporting engagement with the surface of the ground, first latch means for securing the manually operable change means to the frame with the main wheels in contact with the ground, and second latch means for securing the manually operable change means to the frame with the auxiliary wheels in contact with the ground.
Claim 2
Dependent Claim
167 words
A cart for transporting photographic equipment or the like comprising a frame having a platform and side members, an axle rotatably mounted in the frame near the platform and having opposite ends projecting laterally of the side members, an arm secured to each opposite end of the axle for swinging movement in a vertical plane, a first and second pair of spindles mounted on opposite ends of the arms, a pair of main wheels journalled on the first pair of spindles, a pair of auxiliary wheels journalled on the second pair of spindles, manually operable change means for rotating the axle whereby to selectively swing the main wheels or the auxiliary wheels into cart supporting engagement with the surface of the ground, first latch means for securing the manually operable change means to the frame with the main wheels in contact with the ground, and second latch means for securing the manually operable change means to the frame with the auxiliary wheels in contact with the ground.
Claim 3
Dependent Claim
164 words
A cart for transporting photographic equipment or the like comprising a frame having a platform and side members, an axle rotatably mounted in the frame near the platform and having opposite ends projecting laterally of the side members, an arm secured to each opposite end of the axle for swinging movement in a vertical plane, a first and a second pair of spindles mounted on opposite ends of the arms, a pair of main wheels journalled on the first pair of spindles, a pair of auxiliary wheels journalled on the second pair of spindles, manually operable change means for rotating the axle whereby to selectively swing the main wheels or the auxiliary wheels into cart supporting engagement with the surface of the ground, and a stand mounted on the frame for movement to a ground engaging position whereby to support said frame elevated above the surface of the ground a distance greater than the maximum arc of swing of the main and auxiliary wheels.
Claim 4
Dependent Claim
164 words
A cart for transporting photographic equipment or the like comprising a frame having a platform and side members, an axle rotatably mounted in the frame near the platform and having opposite ends projecting laterally of the side members, an arm secured to each opposite end of the axle for swinging movement in a vertical plane, a first and a second pair of spindles mounted on opposite ends of the arms, a pair of main wheels journalled on the first pair of spindles, a pair of auxiliary wheels journalled on the second pair of spindles, manually operable change means for rotating the axle whereby to selectively swing the main wheels or the auxiliary wheels into cart supporting engagement with the surface of the ground, and a stand mounted on the frame for movement to a ground engaging position whereby to support said frame elevated above the surface of the ground a distance greater than the maximum arc of swing of the main and auxiliary wheels.
Claim 5
Dependent Claim
22 words
A cart as claimed in claim 2, and including hinge means for folding the platform substantially into parallelism with the side members.
Claim 6
Dependent Claim
19 words
A cart as claimed in claim 3, and including locking means for securing the platform in the unfolded position.
Claim 7
Dependent Claim
34 words
A cart as claimed in claim 2, in which said side members each comprise upper and lower posts, and catch means for securing the upper posts of each side member in the extended position.
Claim 8
Dependent Claim
38 words
A cart as claimed in claim 2, in which said manually operable change means includes a lever having two operating positions, and a latch plate carried by the frame for engagement by the lever in each operating position.
Claim 9
Dependent Claim
167 words
A cart for transporting photographic equipment or the like comprising a platform and side members, a leg on the platform near the forward edge thereof, an axle rotatably mounted in the frame near the rearward edge of the platform and having opposite ends projecting laterally of the side members, an arm secured to each opposite end of the axle for swinging movement in a vertical plane, a first and a second pair of spindles mounted on opposite ends of the arms, a pair of main wheels journalled on the first pair of spindles, a pair of auxiliary wheels journalled on the second pair of spindles, a lever secured to the axle for swinging either the main or auxiliary wheeLs into a ground engaging position, a first latch plate carried by the frame for engagement by the lever when the main wheels are in ground-engaging position, and a second latch plate carried by the frame for engagement by the lever when the auxiliary wheels are in ground-engaging position.
Claim 10
Dependent Claim
167 words
A cart for transporting photographic equipment or the like comprising a platform and side members, a leg on the platform near the forward edge thereof, an axle rotatably mounted in the frame near the rearward edge of the platform and having opposite ends projecting laterally of the side members, an arm secured to each opposite end of the axle for swinging movement in a vertical plane, a first and a second pair of spindles mounted on opposite ends of the arms, a pair of main wheels journalled on the first pair of spindles, a pair of auxiliary wheels journalled on the second pair of spindles, a lever secured to the axle for swinging either the main or auxiliary wheeLs into a ground engaging position, a first latch plate carried by the frame for engagement by the lever when the main wheels are in ground-engaging position, and a second latch plate carried by the frame for engagement by the lever when the auxiliary wheels are in ground-engaging position.
Claim 11
Dependent Claim
36 words
A cart as claimed in claim 7, and including a stand mounted on the frame for movement between a stored position and a position of use, and spring means biasing the stand towards the stored position.
Claim 12
Dependent Claim
94 words
A cart as claimed in claim 7, in which said platform comprises an inner portion and an outer portion hingedly connected together whereby said outer portion is swingable about a transverse axis to a substantially upright position, side plates carried by the frame above on the platform and having inner and outer portions hingedly connected together whereby said outer portions are swingable about vertical axes to folded positions alongside the platform outer portion in the upright position, and locking means for securing the outer portions of the side plates to the platform outer portion.
Claim 13
Dependent Claim
35 words
A cart as claimed in claim 9, in which said side members each comprise telescoping upper and lower posts, and catch means for securing the upper posts of each side member in the extended position.
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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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |